How Does Blockchain Use Public Key Cryptography

Dallas Bitcoin

Bitcoin is the currency of the Internet: a distributed, worldwide, decentralized digital money. Unlike traditional currencies such as dollars, bitcoins are issued and managed without any central authority whatsoever: there is no government, company, or bank in charge of Bitcoin. As such, it is more resistant to wild inflation and corrupt banks. With Bitcoin, you can be your own bank.
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Worldcoin Discussion

Worldcoin is a digital currency secured by cryptography. As a descendant of Bitcoin it shares many similarities but is more advanced and friendly to Brick and Mortar Businesses which require the fastest speed possible.
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Worldcoin: Think Outside The Banks

Worldcoin is a digital currency secured by cryptography. As a descendant of Bitcoin it shares many similarities but is more advanced and friendly to Brick and Mortar Businesses which require the fastest speed possible."
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To what extent public-key cryptography secures bitcoin transactions?

Can somebody verify if my research question is correct or whether it requires modification.
submitted by Parthgada1 to Bitcoin [link] [comments]

TAU uses Bitcoin cryptographic technologies that have been proved reliable. These include public-key cryptography, digital signature and address-based transactions.

TAU uses Bitcoin cryptographic technologies that have been proved reliable. These include public-key cryptography, digital signature and address-based transactions.
https://www.taucoin.io/
#TAUcoin #TAU #blockchain #POT #crypto
submitted by harjas2517 to ethinvestor [link] [comments]

07-23 13:32 - 'Can somebody help me reframe this research question? "To what extent public-key cryptography is viable for bitcoin transactions? "' (self.Bitcoin) by /u/Parthgada1 removed from /r/Bitcoin within 417-427min

'''
It is for my extended essay, also suggest me a few related and precise research question.
'''
Can somebody help me reframe this research question? "To what extent public-key cryptography is viable for bitcoin transactions? "
Go1dfish undelete link
unreddit undelete link
Author: Parthgada1
submitted by removalbot to removalbot [link] [comments]

TAU uses Bitcoin cryptographic technologies that have been proved reliable. These include public-key cryptography, digital signature and address-based transactions.

TAU uses Bitcoin cryptographic technologies that have been proved reliable. These include public-key cryptography, digital signature and address-based transactions.
https://www.taucoin.io/
#TAUcoin #TAU #blockchain #POT #crypto
submitted by harjas2517 to Crypto_ICO_Investing [link] [comments]

#Cryptography is the #essential #building #block of #independence for #organizations on the #Internet and #Beonbox #makes this #system #comfortable for #both sides. #ico #erc20 #eth #bitcoin #btc #eos #price #crypto #cryptocurrency #token #tokensale #exchange #transaction #japan

#Cryptography is the #essential #building #block of #independence for #organizations on the #Internet and #Beonbox #makes this #system #comfortable for #both sides. #ico #erc20 #eth #bitcoin #btc #eos #price #crypto #cryptocurrency #token #tokensale #exchange #transaction #japan submitted by Toscrypto to u/Toscrypto [link] [comments]

Technical: Taproot: Why Activate?

This is a follow-up on https://old.reddit.com/Bitcoin/comments/hqzp14/technical_the_path_to_taproot_activation/
Taproot! Everybody wants it!! But... you might ask yourself: sure, everybody else wants it, but why would I, sovereign Bitcoin HODLer, want it? Surely I can be better than everybody else because I swapped XXX fiat for Bitcoin unlike all those nocoiners?
And it is important for you to know the reasons why you, o sovereign Bitcoiner, would want Taproot activated. After all, your nodes (or the nodes your wallets use, which if you are SPV, you hopefully can pester to your wallet vendoimplementor about) need to be upgraded in order for Taproot activation to actually succeed instead of becoming a hot sticky mess.
First, let's consider some principles of Bitcoin.
I'm sure most of us here would agree that the above are very important principles of Bitcoin and that these are principles we would not be willing to remove. If anything, we would want those principles strengthened (especially the last one, financial privacy, which current Bitcoin is only sporadically strong with: you can get privacy, it just requires effort to do so).
So, how does Taproot affect those principles?

Taproot and Your /Coins

Most HODLers probably HODL their coins in singlesig addresses. Sadly, switching to Taproot would do very little for you (it gives a mild discount at spend time, at the cost of a mild increase in fee at receive time (paid by whoever sends to you, so if it's a self-send from a P2PKH or bech32 address, you pay for this); mostly a wash).
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash, so the Taproot output spends 12 bytes more; spending from a P2WPKH requires revealing a 32-byte public key later, which is not needed with Taproot, and Taproot signatures are about 9 bytes smaller than P2WPKH signatures, but the 32 bytes plus 9 bytes is divided by 4 because of the witness discount, so it saves about 11 bytes; mostly a wash, it increases blockweight by about 1 virtual byte, 4 weight for each Taproot-output-input, compared to P2WPKH-output-input).
However, as your HODLings grow in value, you might start wondering if multisignature k-of-n setups might be better for the security of your savings. And it is in multisignature that Taproot starts to give benefits!
Taproot switches to using Schnorr signing scheme. Schnorr makes key aggregation -- constructing a single public key from multiple public keys -- almost as trivial as adding numbers together. "Almost" because it involves some fairly advanced math instead of simple boring number adding, but hey when was the last time you added up your grocery list prices by hand huh?
With current P2SH and P2WSH multisignature schemes, if you have a 2-of-3 setup, then to spend, you need to provide two different signatures from two different public keys. With Taproot, you can create, using special moon math, a single public key that represents your 2-of-3 setup. Then you just put two of your devices together, have them communicate to each other (this can be done airgapped, in theory, by sending QR codes: the software to do this is not even being built yet, but that's because Taproot hasn't activated yet!), and they will make a single signature to authorize any spend from your 2-of-3 address. That's 73 witness bytes -- 18.25 virtual bytes -- of signatures you save!
And if you decide that your current setup with 1-of-1 P2PKH / P2WPKH addresses is just fine as-is: well, that's the whole point of a softfork: backwards-compatibility; you can receive from Taproot users just fine, and once your wallet is updated for Taproot-sending support, you can send to Taproot users just fine as well!
(P2WPKH and P2WSH -- SegWit v0 -- addresses start with bc1q; Taproot -- SegWit v1 --- addresses start with bc1p, in case you wanted to know the difference; in bech32 q is 0, p is 1)
Now how about HODLers who keep all, or some, of their coins on custodial services? Well, any custodial service worth its salt would be doing at least 2-of-3, or probably something even bigger, like 11-of-15. So your custodial service, if it switched to using Taproot internally, could save a lot more (imagine an 11-of-15 getting reduced from 11 signatures to just 1!), which --- we can only hope! --- should translate to lower fees and better customer service from your custodial service!
So I think we can say, very accurately, that the Bitcoin principle --- that YOU are in control of your money --- can only be helped by Taproot (if you are doing multisignature), and, because P2PKH and P2WPKH remain validly-usable addresses in a Taproot future, will not be harmed by Taproot. Its benefit to this principle might be small (it mostly only benefits multisignature users) but since it has no drawbacks with this (i.e. singlesig users can continue to use P2WPKH and P2PKH still) this is still a nice, tidy win!
(even singlesig users get a minor benefit, in that multisig users will now reduce their blockchain space footprint, so that fees can be kept low for everybody; so for example even if you have your single set of private keys engraved on titanium plates sealed in an airtight box stored in a safe buried in a desert protected by angry nomads riding giant sandworms because you're the frickin' Kwisatz Haderach, you still gain some benefit from Taproot)
And here's the important part: if P2PKH/P2WPKH is working perfectly fine with you and you decide to never use Taproot yourself, Taproot will not affect you detrimentally. First do no harm!

Taproot and Your Contracts

No one is an island, no one lives alone. Give and you shall receive. You know: by trading with other people, you can gain expertise in some obscure little necessity of the world (and greatly increase your productivity in that little field), and then trade the products of your expertise for necessities other people have created, all of you thereby gaining gains from trade.
So, contracts, which are basically enforceable agreements that facilitate trading with people who you do not personally know and therefore might not trust.
Let's start with a simple example. You want to buy some gewgaws from somebody. But you don't know them personally. The seller wants the money, you want their gewgaws, but because of the lack of trust (you don't know them!! what if they're scammers??) neither of you can benefit from gains from trade.
However, suppose both of you know of some entity that both of you trust. That entity can act as a trusted escrow. The entity provides you security: this enables the trade, allowing both of you to get gains from trade.
In Bitcoin-land, this can be implemented as a 2-of-3 multisignature. The three signatories in the multisgnature would be you, the gewgaw seller, and the escrow. You put the payment for the gewgaws into this 2-of-3 multisignature address.
Now, suppose it turns out neither of you are scammers (whaaaat!). You receive the gewgaws just fine and you're willing to pay up for them. Then you and the gewgaw seller just sign a transaction --- you and the gewgaw seller are 2, sufficient to trigger the 2-of-3 --- that spends from the 2-of-3 address to a singlesig the gewgaw seller wants (or whatever address the gewgaw seller wants).
But suppose some problem arises. The seller gave you gawgews instead of gewgaws. Or you decided to keep the gewgaws but not sign the transaction to release the funds to the seller. In either case, the escrow is notified, and if it can sign with you to refund the funds back to you (if the seller was a scammer) or it can sign with the seller to forward the funds to the seller (if you were a scammer).
Taproot helps with this: like mentioned above, it allows multisignature setups to produce only one signature, reducing blockchain space usage, and thus making contracts --- which require multiple people, by definition, you don't make contracts with yourself --- is made cheaper (which we hope enables more of these setups to happen for more gains from trade for everyone, also, moon and lambos).
(technology-wise, it's easier to make an n-of-n than a k-of-n, making a k-of-n would require a complex setup involving a long ritual with many communication rounds between the n participants, but an n-of-n can be done trivially with some moon math. You can, however, make what is effectively a 2-of-3 by using a three-branch SCRIPT: either 2-of-2 of you and seller, OR 2-of-2 of you and escrow, OR 2-of-2 of escrow and seller. Fortunately, Taproot adds a facility to embed a SCRIPT inside a public key, so you can have a 2-of-2 Taprooted address (between you and seller) with a SCRIPT branch that can instead be spent with 2-of-2 (you + escrow) OR 2-of-2 (seller + escrow), which implements the three-branched SCRIPT above. If neither of you are scammers (hopefully the common case) then you both sign using your keys and never have to contact the escrow, since you are just using the escrow public key without coordinating with them (because n-of-n is trivial but k-of-n requires setup with communication rounds), so in the "best case" where both of you are honest traders, you also get a privacy boost, in that the escrow never learns you have been trading on gewgaws, I mean ewww, gawgews are much better than gewgaws and therefore I now judge you for being a gewgaw enthusiast, you filthy gewgawer).

Taproot and Your Contracts, Part 2: Cryptographic Boogaloo

Now suppose you want to buy some data instead of things. For example, maybe you have some closed-source software in trial mode installed, and want to pay the developer for the full version. You want to pay for an activation code.
This can be done, today, by using an HTLC. The developer tells you the hash of the activation code. You pay to an HTLC, paying out to the developer if it reveals the preimage (the activation code), or refunding the money back to you after a pre-agreed timeout. If the developer claims the funds, it has to reveal the preimage, which is the activation code, and you can now activate your software. If the developer does not claim the funds by the timeout, you get refunded.
And you can do that, with HTLCs, today.
Of course, HTLCs do have problems:
Fortunately, with Schnorr (which is enabled by Taproot), we can now use the Scriptless Script constuction by Andrew Poelstra. This Scriptless Script allows a new construction, the PTLC or Pointlocked Timelocked Contract. Instead of hashes and preimages, just replace "hash" with "point" and "preimage" with "scalar".
Or as you might know them: "point" is really "public key" and "scalar" is really a "private key". What a PTLC does is that, given a particular public key, the pointlocked branch can be spent only if the spender reveals the private key of the given public key to you.
Another nice thing with PTLCs is that they are deniable. What appears onchain is just a single 2-of-2 signature between you and the developemanufacturer. It's like a magic trick. This signature has no special watermarks, it's a perfectly normal signature (the pledge). However, from this signature, plus some datta given to you by the developemanufacturer (known as the adaptor signature) you can derive the private key of a particular public key you both agree on (the turn). Anyone scraping the blockchain will just see signatures that look just like every other signature, and as long as nobody manages to hack you and get a copy of the adaptor signature or the private key, they cannot get the private key behind the public key (point) that the pointlocked branch needs (the prestige).
(Just to be clear, the public key you are getting the private key from, is distinct from the public key that the developemanufacturer will use for its funds. The activation key is different from the developer's onchain Bitcoin key, and it is the activation key whose private key you will be learning, not the developer's/manufacturer's onchain Bitcoin key).
So:
Taproot lets PTLCs exist onchain because they enable Schnorr, which is a requirement of PTLCs / Scriptless Script.
(technology-wise, take note that Scriptless Script works only for the "pointlocked" branch of the contract; you need normal Script, or a pre-signed nLockTimed transaction, for the "timelocked" branch. Since Taproot can embed a script, you can have the Taproot pubkey be a 2-of-2 to implement the Scriptless Script "pointlocked" branch, then have a hidden script that lets you recover the funds with an OP_CHECKLOCKTIMEVERIFY after the timeout if the seller does not claim the funds.)

Quantum Quibbles!

Now if you were really paying attention, you might have noticed this parenthetical:
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash...)
So wait, Taproot uses raw 32-byte public keys, and not public key hashes? Isn't that more quantum-vulnerable??
Well, in theory yes. In practice, they probably are not.
It's not that hashes can be broken by quantum computes --- they're still not. Instead, you have to look at how you spend from a P2WPKH/P2PKH pay-to-public-key-hash.
When you spend from a P2PKH / P2WPKH, you have to reveal the public key. Then Bitcoin hashes it and checks if this matches with the public-key-hash, and only then actually validates the signature for that public key.
So an unconfirmed transaction, floating in the mempools of nodes globally, will show, in plain sight for everyone to see, your public key.
(public keys should be public, that's why they're called public keys, LOL)
And if quantum computers are fast enough to be of concern, then they are probably fast enough that, in the several minutes to several hours from broadcast to confirmation, they have already cracked the public key that is openly broadcast with your transaction. The owner of the quantum computer can now replace your unconfirmed transaction with one that pays the funds to itself. Even if you did not opt-in RBF, miners are still incentivized to support RBF on RBF-disabled transactions.
So the extra hash is not as significant a protection against quantum computers as you might think. Instead, the extra hash-and-compare needed is just extra validation effort.
Further, if you have ever, in the past, spent from the address, then there exists already a transaction indelibly stored on the blockchain, openly displaying the public key from which quantum computers can derive the private key. So those are still vulnerable to quantum computers.
For the most part, the cryptographers behind Taproot (and Bitcoin Core) are of the opinion that quantum computers capable of cracking Bitcoin pubkeys are unlikely to appear within a decade or two.
So:
For now, the homomorphic and linear properties of elliptic curve cryptography provide a lot of benefits --- particularly the linearity property is what enables Scriptless Script and simple multisignature (i.e. multisignatures that are just 1 signature onchain). So it might be a good idea to take advantage of them now while we are still fairly safe against quantum computers. It seems likely that quantum-safe signature schemes are nonlinear (thus losing these advantages).

Summary

I Wanna Be The Taprooter!

So, do you want to help activate Taproot? Here's what you, mister sovereign Bitcoin HODLer, can do!

But I Hate Taproot!!

That's fine!

Discussions About Taproot Activation

submitted by almkglor to Bitcoin [link] [comments]

Isn’t gold technically the most non-counterfeitable money if we were to go back to it? Instead of needing black lights or to hold bills up to the sun, which could still be fake, you can just blast the gold with a sound reader and verify it’s real

submitted by MayISeeYourNosePls to Gold [link] [comments]

Decentr ($DEC) - foundational cross-chain and cross-platform DeFi protocol

  1. SUMMARY
Decentr is a protocol designed to make blockchain/DLT mainstream by allowing DeFi applications built on various blockchains to “talk to each other”. Decentr is a 100% secure and decentralised Web 3.0 protocol where users can apply PDV (personal data value) to increase APR on $DEC that users loan out as part of of our DeFi dLoan features, as well as it being applied at PoS when paying for stuff online. Decentr is also building a BAT competitor browser and Chrome/Firefox extension that acts as a gateway to 100% decentralised Web 3.0
Allows DeFi Dapps to access all Decentr’s dFintech features, including dLoan, dPay. Key innovation is that the protocols is based on a user’s ability to leverage the value of their data as exchangeable “currency”.
  1. KEY CONCEPTS

  1. REVENUE MODEL
A fee is charged for every transaction using dPay whereby an exchange takes place between money (fiat and digital) and data, and vice versa, either as part of DeFi features or via a dApp built on Decentr. They are launching pilot programmes in the following industries:
  1. Banking/PSP Industry: On Product launch, due to Decentr’s powerful PSP connections (including the worlds #2 PSP by volume), a medium-scale pilot program will be launched, which will seed the network with 150,000 PSP customers in primarily the Spanish/LAC markets, generating revenue from day one.
  2. “Bricks and Mortar” Supermarket/Grocery Industry: Decentr aims to ensure the long-term competitiveness of “bricks and mortar” supermarkets against online-only grocery retailers, such as Amazon, by a) building secure tech that allows supermarkets to digitise every aspect of their supply chains and operational functions, while b) allowing supermarkets to leverage this incredibly valuable data as a liquid asset class. Expected revenue by Year 5: $114Mn per year.
  3. Online Advertising Industry: Decentr’s 100% decentralised platform credits users secure data with payable value, in the form of PDV, for engaging with ads. The Brave browser was launched in 2012 and in 8 years has reached over 12 million monthly active users, accented by as many as 4.3 million daily active users.
  4. TOKEN $DEC AND SALE
Decentr recently complete their token sale on a purchase portal powered by Dolomite where they raised $974,000 in 10 minutes for a total sale hardcap of 1.25M. The $DEC token is actively trading on multiple exchanges including Uniswap and IDEX. Listed for free on IDEX, Hotbit, Hoo, Coinw, Tidex, BKex. Listed on CoinGecko and Coinmarketcap. Listed on Delta and Blockfolio apps.
➡️ Circulating supply: 61m $DEC.
➡️ Release schedule and token distribution LINK -> NO RELEASE UNTIL 2021.
➡️Contract Address - 0x30f271C9E86D2B7d00a6376Cd96A1cFBD5F0b9b3
➡️Decimals - 18, Ticker - DEC
➡️Uniswap link: https://uniswap.info/pai0x3AEEE5bA053eF8406420DbC5801fC95eC57b0E0A
⭐️ HOW TO BUY VIDEO: https://www.youtube.com/watch?v=iloAiv2oCRc&feature=youtu.be
$DEC Token utility:
A tradeable unit of value that is both internal and external to the Decentr platform.A unit of conversion between fiat entering and exiting the Decentr ecosystem.A way to capture the value of user data and combines the activity of every participant of the platform performing payment (dPay), or lending and borrowing (dLend), i.e a way to peg PDV to tangible/actionable value.Method of payment in the Decentr ecosystem.A method to internally underwrite the “Deconomy.
  1. NOTABLE SUPPORTERS
Simon Dedic - chief of Blockfyre: https://twitter.com/scoinaldo/status/1283787644221218817?s=20https://twitter.com/scoinaldo/status/1283719917657894912?s=21
Spectre Group Pick : https://twitter.com/SPECTREGRP/status/1284761576873041920https://twitter.com/llluckyl/status/1283765481716015111?s=21
Patrons of the Moon/Lil Uzi: https://t.me/patronsofthemoon/6764
CryptoGems: https://twitter.com/cryptogems_com/status/1283719318379925506?s=09t
tehMoonwalker pick who is a TOP 5 influencer per Binance:https://twitter.com/tehMoonwalkestatus/1284123961996050432?s=20https://twitter.com/binance/status/1279049822113198080
Holochain was one of their earliest supporters and they share a deep connection (recently an AMA was conducted in their TG group): https://medium.com/@DecentrNet/decentr-holochain-ama-29d662caed03
  1. UPCOMING NEWS
--------------------------------------------
  1. RESOURCES:
Website: https://decentr.net
Telegram: https://t.me/DecentrNet
Medium: https://medium.com/@DecentrNet
Twitter: https://twitter.com/DecentrNet
Whitepaper: https://decentr.net/files/Decentr_Whitepaper_V1.4.pdf
Technical Whitepaper: https://decentr.net/files/Decentr_Technical_Whitepaper_Data_As_Economic_Currency.pdf
Recent Articles:
⚡️- https://medium.com/@DecentrNet/decentr-token-sale-metrics-and-distribution-483bb3c58d05
⚡️- https://medium.com/@DecentrNet/how-decentrs-defi-dloan-function-benefits-dec-holders-97ff64a0c105
⚡️- https://medium.com/@DecentrNet/3-vertical-revenue-streams-decentr-is-targeting-4fa1f3dd62de
⚡️- https://medium.com/@DecentrNet/brave-browser-the-good-the-bad-and-the-fundamentally-misguided-8a8593b0ff5b
⚡️- https://medium.com/@DecentrNet/how-decentrs-dfintech-replaces-swift-sct-inst-clearing-house-and-other-payment-solutions-78acacbb4c3f
Chad Gang STRONG Community: https://t.me/decentrtrading
Community News Channel: https://t.me/chadnews
Recent Uniswap trades: https://t.me/dectrades
Wallet holder tracker: https://t.me/DEC_WALLETS_COUNT
submitted by ldd999 to CryptoMoonShots [link] [comments]

[ Bitcoin ] Technical: Taproot: Why Activate?

Topic originally posted in Bitcoin by almkglor [link]
This is a follow-up on https://old.reddit.com/Bitcoin/comments/hqzp14/technical_the_path_to_taproot_activation/
Taproot! Everybody wants it!! But... you might ask yourself: sure, everybody else wants it, but why would I, sovereign Bitcoin HODLer, want it? Surely I can be better than everybody else because I swapped XXX fiat for Bitcoin unlike all those nocoiners?
And it is important for you to know the reasons why you, o sovereign Bitcoiner, would want Taproot activated. After all, your nodes (or the nodes your wallets use, which if you are SPV, you hopefully can pester to your wallet vendoimplementor about) need to be upgraded in order for Taproot activation to actually succeed instead of becoming a hot sticky mess.
First, let's consider some principles of Bitcoin.
I'm sure most of us here would agree that the above are very important principles of Bitcoin and that these are principles we would not be willing to remove. If anything, we would want those principles strengthened (especially the last one, financial privacy, which current Bitcoin is only sporadically strong with: you can get privacy, it just requires effort to do so).
So, how does Taproot affect those principles?

Taproot and Your /Coins

Most HODLers probably HODL their coins in singlesig addresses. Sadly, switching to Taproot would do very little for you (it gives a mild discount at spend time, at the cost of a mild increase in fee at receive time (paid by whoever sends to you, so if it's a self-send from a P2PKH or bech32 address, you pay for this); mostly a wash).
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash, so the Taproot output spends 12 bytes more; spending from a P2WPKH requires revealing a 32-byte public key later, which is not needed with Taproot, and Taproot signatures are about 9 bytes smaller than P2WPKH signatures, but the 32 bytes plus 9 bytes is divided by 4 because of the witness discount, so it saves about 11 bytes; mostly a wash, it increases blockweight by about 1 virtual byte, 4 weight for each Taproot-output-input, compared to P2WPKH-output-input).
However, as your HODLings grow in value, you might start wondering if multisignature k-of-n setups might be better for the security of your savings. And it is in multisignature that Taproot starts to give benefits!
Taproot switches to using Schnorr signing scheme. Schnorr makes key aggregation -- constructing a single public key from multiple public keys -- almost as trivial as adding numbers together. "Almost" because it involves some fairly advanced math instead of simple boring number adding, but hey when was the last time you added up your grocery list prices by hand huh?
With current P2SH and P2WSH multisignature schemes, if you have a 2-of-3 setup, then to spend, you need to provide two different signatures from two different public keys. With Taproot, you can create, using special moon math, a single public key that represents your 2-of-3 setup. Then you just put two of your devices together, have them communicate to each other (this can be done airgapped, in theory, by sending QR codes: the software to do this is not even being built yet, but that's because Taproot hasn't activated yet!), and they will make a single signature to authorize any spend from your 2-of-3 address. That's 73 witness bytes -- 18.25 virtual bytes -- of signatures you save!
And if you decide that your current setup with 1-of-1 P2PKH / P2WPKH addresses is just fine as-is: well, that's the whole point of a softfork: backwards-compatibility; you can receive from Taproot users just fine, and once your wallet is updated for Taproot-sending support, you can send to Taproot users just fine as well!
(P2WPKH and P2WSH -- SegWit v0 -- addresses start with bc1q; Taproot -- SegWit v1 --- addresses start with bc1p, in case you wanted to know the difference; in bech32 q is 0, p is 1)
Now how about HODLers who keep all, or some, of their coins on custodial services? Well, any custodial service worth its salt would be doing at least 2-of-3, or probably something even bigger, like 11-of-15. So your custodial service, if it switched to using Taproot internally, could save a lot more (imagine an 11-of-15 getting reduced from 11 signatures to just 1!), which --- we can only hope! --- should translate to lower fees and better customer service from your custodial service!
So I think we can say, very accurately, that the Bitcoin principle --- that YOU are in control of your money --- can only be helped by Taproot (if you are doing multisignature), and, because P2PKH and P2WPKH remain validly-usable addresses in a Taproot future, will not be harmed by Taproot. Its benefit to this principle might be small (it mostly only benefits multisignature users) but since it has no drawbacks with this (i.e. singlesig users can continue to use P2WPKH and P2PKH still) this is still a nice, tidy win!
(even singlesig users get a minor benefit, in that multisig users will now reduce their blockchain space footprint, so that fees can be kept low for everybody; so for example even if you have your single set of private keys engraved on titanium plates sealed in an airtight box stored in a safe buried in a desert protected by angry nomads riding giant sandworms because you're the frickin' Kwisatz Haderach, you still gain some benefit from Taproot)
And here's the important part: if P2PKH/P2WPKH is working perfectly fine with you and you decide to never use Taproot yourself, Taproot will not affect you detrimentally. First do no harm!

Taproot and Your Contracts

No one is an island, no one lives alone. Give and you shall receive. You know: by trading with other people, you can gain expertise in some obscure little necessity of the world (and greatly increase your productivity in that little field), and then trade the products of your expertise for necessities other people have created, all of you thereby gaining gains from trade.
So, contracts, which are basically enforceable agreements that facilitate trading with people who you do not personally know and therefore might not trust.
Let's start with a simple example. You want to buy some gewgaws from somebody. But you don't know them personally. The seller wants the money, you want their gewgaws, but because of the lack of trust (you don't know them!! what if they're scammers??) neither of you can benefit from gains from trade.
However, suppose both of you know of some entity that both of you trust. That entity can act as a trusted escrow. The entity provides you security: this enables the trade, allowing both of you to get gains from trade.
In Bitcoin-land, this can be implemented as a 2-of-3 multisignature. The three signatories in the multisgnature would be you, the gewgaw seller, and the escrow. You put the payment for the gewgaws into this 2-of-3 multisignature address.
Now, suppose it turns out neither of you are scammers (whaaaat!). You receive the gewgaws just fine and you're willing to pay up for them. Then you and the gewgaw seller just sign a transaction --- you and the gewgaw seller are 2, sufficient to trigger the 2-of-3 --- that spends from the 2-of-3 address to a singlesig the gewgaw seller wants (or whatever address the gewgaw seller wants).
But suppose some problem arises. The seller gave you gawgews instead of gewgaws. Or you decided to keep the gewgaws but not sign the transaction to release the funds to the seller. In either case, the escrow is notified, and if it can sign with you to refund the funds back to you (if the seller was a scammer) or it can sign with the seller to forward the funds to the seller (if you were a scammer).
Taproot helps with this: like mentioned above, it allows multisignature setups to produce only one signature, reducing blockchain space usage, and thus making contracts --- which require multiple people, by definition, you don't make contracts with yourself --- is made cheaper (which we hope enables more of these setups to happen for more gains from trade for everyone, also, moon and lambos).
(technology-wise, it's easier to make an n-of-n than a k-of-n, making a k-of-n would require a complex setup involving a long ritual with many communication rounds between the n participants, but an n-of-n can be done trivially with some moon math. You can, however, make what is effectively a 2-of-3 by using a three-branch SCRIPT: either 2-of-2 of you and seller, OR 2-of-2 of you and escrow, OR 2-of-2 of escrow and seller. Fortunately, Taproot adds a facility to embed a SCRIPT inside a public key, so you can have a 2-of-2 Taprooted address (between you and seller) with a SCRIPT branch that can instead be spent with 2-of-2 (you + escrow) OR 2-of-2 (seller + escrow), which implements the three-branched SCRIPT above. If neither of you are scammers (hopefully the common case) then you both sign using your keys and never have to contact the escrow, since you are just using the escrow public key without coordinating with them (because n-of-n is trivial but k-of-n requires setup with communication rounds), so in the "best case" where both of you are honest traders, you also get a privacy boost, in that the escrow never learns you have been trading on gewgaws, I mean ewww, gawgews are much better than gewgaws and therefore I now judge you for being a gewgaw enthusiast, you filthy gewgawer).

Taproot and Your Contracts, Part 2: Cryptographic Boogaloo

Now suppose you want to buy some data instead of things. For example, maybe you have some closed-source software in trial mode installed, and want to pay the developer for the full version. You want to pay for an activation code.
This can be done, today, by using an HTLC. The developer tells you the hash of the activation code. You pay to an HTLC, paying out to the developer if it reveals the preimage (the activation code), or refunding the money back to you after a pre-agreed timeout. If the developer claims the funds, it has to reveal the preimage, which is the activation code, and you can now activate your software. If the developer does not claim the funds by the timeout, you get refunded.
And you can do that, with HTLCs, today.
Of course, HTLCs do have problems:
Fortunately, with Schnorr (which is enabled by Taproot), we can now use the Scriptless Script constuction by Andrew Poelstra. This Scriptless Script allows a new construction, the PTLC or Pointlocked Timelocked Contract. Instead of hashes and preimages, just replace "hash" with "point" and "preimage" with "scalar".
Or as you might know them: "point" is really "public key" and "scalar" is really a "private key". What a PTLC does is that, given a particular public key, the pointlocked branch can be spent only if the spender reveals the private key of the given private key to you.
Another nice thing with PTLCs is that they are deniable. What appears onchain is just a single 2-of-2 signature between you and the developemanufacturer. It's like a magic trick. This signature has no special watermarks, it's a perfectly normal signature (the pledge). However, from this signature, plus some datta given to you by the developemanufacturer (known as the adaptor signature) you can derive the private key of a particular public key you both agree on (the turn). Anyone scraping the blockchain will just see signatures that look just like every other signature, and as long as nobody manages to hack you and get a copy of the adaptor signature or the private key, they cannot get the private key behind the public key (point) that the pointlocked branch needs (the prestige).
(Just to be clear, the public key you are getting the private key from, is distinct from the public key that the developemanufacturer will use for its funds. The activation key is different from the developer's onchain Bitcoin key, and it is the activation key whose private key you will be learning, not the developer's/manufacturer's onchain Bitcoin key).
So:
Taproot lets PTLCs exist onchain because they enable Schnorr, which is a requirement of PTLCs / Scriptless Script.
(technology-wise, take note that Scriptless Script works only for the "pointlocked" branch of the contract; you need normal Script, or a pre-signed nLockTimed transaction, for the "timelocked" branch. Since Taproot can embed a script, you can have the Taproot pubkey be a 2-of-2 to implement the Scriptless Script "pointlocked" branch, then have a hidden script that lets you recover the funds with an OP_CHECKLOCKTIMEVERIFY after the timeout if the seller does not claim the funds.)

Quantum Quibbles!

Now if you were really paying attention, you might have noticed this parenthetical:
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash...)
So wait, Taproot uses raw 32-byte public keys, and not public key hashes? Isn't that more quantum-vulnerable??
Well, in theory yes. In practice, they probably are not.
It's not that hashes can be broken by quantum computes --- they're still not. Instead, you have to look at how you spend from a P2WPKH/P2PKH pay-to-public-key-hash.
When you spend from a P2PKH / P2WPKH, you have to reveal the public key. Then Bitcoin hashes it and checks if this matches with the public-key-hash, and only then actually validates the signature for that public key.
So an unconfirmed transaction, floating in the mempools of nodes globally, will show, in plain sight for everyone to see, your public key.
(public keys should be public, that's why they're called public keys, LOL)
And if quantum computers are fast enough to be of concern, then they are probably fast enough that, in the several minutes to several hours from broadcast to confirmation, they have already cracked the public key that is openly broadcast with your transaction. The owner of the quantum computer can now replace your unconfirmed transaction with one that pays the funds to itself. Even if you did not opt-in RBF, miners are still incentivized to support RBF on RBF-disabled transactions.
So the extra hash is not as significant a protection against quantum computers as you might think. Instead, the extra hash-and-compare needed is just extra validation effort.
Further, if you have ever, in the past, spent from the address, then there exists already a transaction indelibly stored on the blockchain, openly displaying the public key from which quantum computers can derive the private key. So those are still vulnerable to quantum computers.
For the most part, the cryptographers behind Taproot (and Bitcoin Core) are of the opinion that quantum computers capable of cracking Bitcoin pubkeys are unlikely to appear within a decade or two.
So:
For now, the homomorphic and linear properties of elliptic curve cryptography provide a lot of benefits --- particularly the linearity property is what enables Scriptless Script and simple multisignature (i.e. multisignatures that are just 1 signature onchain). So it might be a good idea to take advantage of them now while we are still fairly safe against quantum computers. It seems likely that quantum-safe signature schemes are nonlinear (thus losing these advantages).

Summary

I Wanna Be The Taprooter!

So, do you want to help activate Taproot? Here's what you, mister sovereign Bitcoin HODLer, can do!

But I Hate Taproot!!

That's fine!

Discussions About Taproot Activation

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submitted by anticensor_bot to u/anticensor_bot [link] [comments]

RIP HAL FINNEY "His last post on a BTC Forum"

I thought I'd write about the last four years, an eventful time for Bitcoin and me.
For those who don't know me, I'm Hal Finney. I got my start in crypto working on an early version of PGP, working closely with Phil Zimmermann. When Phil decided to start PGP Corporation, I was one of the first hires. I would work on PGP until my retirement. At the same time, I got involved with the Cypherpunks. I ran the first cryptographically based anonymous remailer, among other activities.
Fast forward to late 2008 and the announcement of Bitcoin. I've noticed that cryptographic graybeards (I was in my mid 50's) tend to get cynical. I was more idealistic; I have always loved crypto, the mystery and the paradox of it.
When Satoshi announced Bitcoin on the cryptography mailing list, he got a skeptical reception at best. Cryptographers have seen too many grand schemes by clueless noobs. They tend to have a knee jerk reaction.
I was more positive. I had long been interested in cryptographic payment schemes. Plus I was lucky enough to meet and extensively correspond with both Wei Dai and Nick Szabo, generally acknowledged to have created ideas that would be realized with Bitcoin. I had made an attempt to create my own proof of work based currency, called RPOW. So I found Bitcoin facinating.
When Satoshi announced the first release of the software, I grabbed it right away. I think I was the first person besides Satoshi to run bitcoin. I mined block 70-something, and I was the recipient of the first bitcoin transaction, when Satoshi sent ten coins to me as a test. I carried on an email conversation with Satoshi over the next few days, mostly me reporting bugs and him fixing them.
Today, Satoshi's true identity has become a mystery. But at the time, I thought I was dealing with a young man of Japanese ancestry who was very smart and sincere. I've had the good fortune to know many brilliant people over the course of my life, so I recognize the signs.
After a few days, bitcoin was running pretty stably, so I left it running. Those were the days when difficulty was 1, and you could find blocks with a CPU, not even a GPU. I mined several blocks over the next days. But I turned it off because it made my computer run hot, and the fan noise bothered me. In retrospect, I wish I had kept it up longer, but on the other hand I was extraordinarily lucky to be there at the beginning. It's one of those glass half full half empty things.
The next I heard of Bitcoin was late 2010, when I was surprised to find that it was not only still going, bitcoins actually had monetary value. I dusted off my old wallet, and was relieved to discover that my bitcoins were still there. As the price climbed up to real money, I transferred the coins into an offline wallet, where hopefully they'll be worth something to my heirs.
Speaking of heirs, I got a surprise in 2009, when I was suddenly diagnosed with a fatal disease. I was in the best shape of my life at the start of that year, I'd lost a lot of weight and taken up distance running. I'd run several half marathons, and I was starting to train for a full marathon. I worked my way up to 20+ mile runs, and I thought I was all set. That's when everything went wrong.
My body began to fail. I slurred my speech, lost strength in my hands, and my legs were slow to recover. In August, 2009, I was given the diagnosis of ALS, also called Lou Gehrig's disease, after the famous baseball player who got it.
ALS is a disease that kills moter neurons, which carry signals from the brain to the muscles. It causes first weakness, then gradually increasing paralysis. It is usually fatal in 2 to 5 years. My symptoms were mild at first and I continued to work, but fatigue and voice problems forced me to retire in early 2011. Since then the disease has continued its inexorable progression.
Today, I am essentially paralyzed. I am fed through a tube, and my breathing is assisted through another tube. I operate the computer using a commercial eyetracker system. It also has a speech synthesizer, so this is my voice now. I spend all day in my power wheelchair. I worked up an interface using an arduino so that I can adjust my wheelchair's position using my eyes.
It has been an adjustment, but my life is not too bad. I can still read, listen to music, and watch TV and movies. I recently discovered that I can even write code. It's very slow, probably 50 times slower than I was before. But I still love programming and it gives me goals. Currently I'm working on something Mike Hearn suggested, using the security features of modern processors, designed to support "Trusted Computing", to harden Bitcoin wallets. It's almost ready to release. I just have to do the documentation.
And of course the price gyrations of bitcoins are entertaining to me. I have skin in the game. But I came by my bitcoins through luck, with little credit to me. I lived through the crash of 2011. So I've seen it before. Easy come, easy go.
That's my story. I'm pretty lucky overall. Even with the ALS, my life is very satisfying. But my life expectancy is limited. Those discussions about inheriting your bitcoins are of more than academic interest. My bitcoins are stored in our safe deposit box, and my son and daughter are tech savvy. I think they're safe enough. I'm comfortable with my legacy.
submitted by Cxesar to Bitcoin [link] [comments]

Difference between Blockchain and Cryptocurrency

Definition
Blockchain is a dispersed and computerised record book. That takes into account finished transactions in sequential order. it's ability to store data in a manner that is not to be replicated or hacked.
While, a cryptocurrency is derived from the words cryptography and currency. Crypto graphic refers to ability of code writing, and currency is a monetary system utilised by a certain country. This means it is a virtual and digitised currency created by cryptography. Which makes it available as an online currency solely. It's difference towards traditional currency is it isn't issue by the government, but gained through software and alogorithims.
Similarities
Intangible- They are virtual presences
Technology- Both contribute to recent technological innovations
Interdependence- They rely on one another. Blockchains allow the process for purchase activity, and Cryptocurrencies are the specific entities being transitioned.
Differences
Use- Cryptocurrencies is utilised pay, invest and store wealth. Blockchain is the driver of transactions involving cryptocurrencies.
Value- Cryptocurrencies has a value on a monetary basis and be made use of as wealth measurement, unlike blockchains.
Mobility- Cryptocurrencies such as bitcoin can be moved between accounts. Blockchains are immobile.

Source:
http://www.differencebetween.net/technology/internet/difference-between-blockchain-and-cryptocurrency/#:~:text=%20Differences%20Between%20Block%20Chain%20and%20Cryptocurrency%20,account%20to%20another.%20Blockchains%20are%20not...%20More%20
submitted by cryptoquirk to CryptoTechnology [link] [comments]

Introducing the NGRAVE ZERO hardware wallet

Introducing the NGRAVE ZERO hardware wallet
Dear community, I would like to introduce you to our new hardware wallet - NGRAVE ZERO - but first I want to address the likely immediate skepticism popping up in your head - "oh no, another one, why should I even bother listening to this?", etc. You might be thinking something along these lines, and rightfully so if you do. So, I want you to know why we really built this.
We chose this path because we are blockchain technology believers, yet our very own experiences have reminded us over and over again that holding crypto isn't safe or at least full of dangers. The best (and for him worst) example is our CTO losing 44,000ETH with his company SwarmCity in the 2017 Parity hack. Similar experiences brought us, the three co-founders of NGRAVE, together in 2018. There and then, we decided to build the one solution that we would fully trust with our very first till our very last bitcoin. A solution to empower you, the user, to start truly owning what is yours.
Throughout our journey, we partnered up with world leading players in nanotechnology, applied cryptography, hardware security, and more. Even the second reference of Satoshi's famed bitcoin paper - the famous cryptographer Jean-Jacques Quisquater - mentioned in almost every cryptography paper - joined in on our project. The result: we built, from the ground up, a new hardware wallet - ZERO - and a new metal backup solution - GRAPHENE. We even designed a system, together with Chainlink, for the safe posthumous recovery of your keys by your family, when the time comes.
We analysed the end-to-end process of you owning your crypto, starting with the generation of your private keys (or master seed), having a real time overview of your accounts, receiving and signing transactions - basically your full user journey. And we left no stone unturned when looking at your security and ease of use. Today, I'm happy to tell you that our pre-order is live on Indiegogo since one week, and that we just surpassed our 500th backer.
With leaving no stone unturned, we really mean it. We for example upgraded the key generation process, so that you no longer have to worry about backdoors in the interior (TRNG) chip (not necessarily by the manufacturer but even by governments and intelligence agencies), or that the hardware manufacturer might have information on your keys. Our ZERO is completely offline, multi-layered tamper proof, and the only blockchain solution in the world with an EAL7 security certification, the highest achievable. That's how serious we take your security.
I'm telling you this now as I believe this is a very good time to contemplate how serious you are about your security and ease of use when managing your crypto. Especially since several of us are already smelling the next bull run. Also especially since you can get the ZERO and GRAPHENE at a considerable discount, right now. And especially since your security is not open for discussion.
And know, if our intention was purely to sell and get rich, we would have chosen an easier entrepreneurial path, but we didn't. We chose the extremely challenging mix of hardware, high security, crypto (a difficult environment to sell given the unfortunate high amount of scams, as well as we started this journey when crypto winter kicked in). We chose this path because we are all-in into fostering worldwide blockchain adoption, and therefore, we make a promise to tackle the security and usability hurdles. No cutting corners.
Start truly owning what is yours.
Ruben

https://www.indiegogo.com/projects/zero-the-most-secure-easy-to-use-crypto-wallet

https://preview.redd.it/3ctcja3nq2351.png?width=1386&format=png&auto=webp&s=7a6c4653a04157ec22a6c2de91c0613105b3ba4e
submitted by RUME_NGRV to Bitcoin [link] [comments]

How vulnerable is Monero to chain analysis, given a large dataset?

Title, basically.
From what I understand, monero obscures identity through "proxy" addresses that act as an intermediate. But if those addresses are the same, doesn't that make the system vulnerable to attacks through tracing a large number of transactions?
submitted by dystariel to Monero [link] [comments]

Ideas

Alllo, I know I'm new here when it comes to posting but have been a long time lurker and have owned Sia coin in some form or another since 2017. Sia in my opinion is the coin that is most ready to go in crypto with a genuine use case. Bitcoin is great for anonymous (close enough) transactions, Etherium is a pleasure to use, Chainlink appears to be the defacto standard for acting as a gateway between currencies and out of the storage coins I've always kept an eye on Sia, IPFS and MaidSafeCoin.
I am by far an expert on any of this but feel like I could contribute in ways that I think I would like to use Sia for (actually why I bought about a grand worth the other week). I build websites and applications on top of PHP, WordPress and Python mainly and am not an expert programmer but I get projects done.
If I were able to easily use Sia as storage for my WordPress sites I would be over the moon but at this stage it looks like IPFS is further along. Thankfully the protocol is quite similar so I should be able to fork, modify and maintain an already existing plugin.
I noticed there is a repository for Nextcloud on GitLab (I didn't know that existed until just then actually). This is another plugin, that if done well could have a HUGE impact on getting actual users into Sia.
If users are able to easily buy Sia coin (at the moment it is way too hard for the average user, this goes for pretty much any cryptocurrency) and set it up without having to touch code or understand asynchronous cryptography we're on a winner.
WordPress and Nextcloud are both sleeping giants when it comes to businesses with less than 100-500 employees and they both come with a huge community backing so development on top of them shouldn't have to suck resources to maintain them as well as the plugins.
Are there already any groups that work on stuff like this? I know there is the Discord, which I'll join shortly but please reach out if you agree with my post, would like to add any input or simply feel like roasting me.
Cheers
EDIT: Just found this post that might be a good starting point for me. https://www.reddit.com/siacoin/comments/gtvzqb/im_in_love_with_the_skynet_project_i_did_a_simple/
EDIT: I'd also like to volunteer my time to anything website or social media related. I noticed it looks like the Facebook page has been abandoned a long time ago.
submitted by loftizle to siacoin [link] [comments]

From Conspiracy to Fact: An analysis of the COVID-19 Pandemic, Information Control, and the New World Order (Appendix includes hundreds of citations) - PART 1

UPDATE: This article is now available as a printable PDF with embedded hyperlinks for navigation through sources. This link will be valid thru July 9: https://ufile.io/4mpkg4x6

PLEASE NOTE: This article may be updated periodically with new information and links as they become available. All referenced information and a whole lot more is indexed and linked in the related appendix posts. Please feel free to crosspost, share, and take from my ideas to build your own. Namaste.
Part 1 | Part 2 | Appendix A | Appendix B

Hello. My name is Chris. I am nobody, really. An average citizen. I am an overweight 42 year old white male from the Midwestern suburbs of the US who has been fortunate enough to live a pretty comfortable life. I used to be a freelance graphic designer with a focus on small businesses, but I'm coming to terms with the fact that that career and part of my life is more than likely over in light of current events. Oh well, it was fun while it lasted.
I've always been concerned about social injustice and tried to stay politically informed, even dabbling in some activism here and there. At times I've stepped away from paying attention for my own mental health, or due to laziness, defeatism, whatever. But I've never stopped caring, or trying, to fight the good fight and do the right thing.
The news recently has of course swept us all up, and touched all our lives in some way or another. The world has never seen anything like the "Coronavirus Pandemic," and it's clear that our society will be changed forever when we finally come out the other end of this mess. But I've had the luxury of time recently, and in reading the news about things that were going on, I couldn't help but notice the patterns, and that a lot of stuff didn't exactly make sense.
So, here we go, with the "conspiracy theory."
I hate that term, because although it's technically accurate, it's been demonized and weaponized by the media and society at large to take on a bad connotation. Tinfoil hats, alien abductions, crazy people muttering to themselves, etc. You've no doubt got a lot of images in your mind of a conspiracy theorist.
And make no mistake, what I'm going to tell you here is all currently very popular conspiracy theory. However, I think that by removing opinions and conjecture from it, and focusing on facts and things that have already happened, I can present this huge amount of overwhelming, disparate information in a way that makes it less a "theory" and more a "research project." And so that is how I have approached this.
I have spent the last week doing little else besides reading every news and opinion article I could find, saving and organizing hundreds of links, and assembling a coherent, logical outline to organize and present these theories, and more importantly, facts. There are a lot of less-than-reputable sites and publications out there, and I have tried when at all possible to provide sources from verifiable news sites, with a wide range of slants and focuses, to illustrate that what is happening is not part of any one particular political agenda.
I hope that you take the time to check the links, really look into the information presented here, and form your own opinions. Please do not just take my word for it. To that end, there are also a few links mixed in that are labeled as having come from conspiracy. These are well-written and well-reasoned posts from other concerned citizens that I think are worth reading, and relevant to the discussion here.
One last thing - If you are new to most of these ideas, the information presented here is more than likely going to seem overwhelming at first. I encourage you now, and always, to take mental health breaks for yourself, and put down your phone or turn off your computer. The information will be here when you come back. And as you'll soon understand, what is happening is an unstoppable tide, truly a force of nature at this point, and there is nothing you can do to fight it, so try your hardest to relax, put on some chill music, hug your dog, and most of all...
BREATHE.
- - - - - - - - - - - - - - - - - - - - -
If you start researching conspiracy theory, you're going to find a lot of information. Some much better or worse presented than others, and some much more plausible or unbelievable than others. Despite the seeming ridiculousness of some things you might read, I encourage you to always approach new information with an open mind.
That said though, I have one main principle that guides all my beliefs about conspiracy theories, and that is the "Filter of Likelihood." Essentially, you have to ask yourself how possible, how likely, and how feasible a piece of information is. Furthermore, you need to ask yourself what the motivation would be. In many cases, it's quite easy to see how something makes a lot of sense based on other known info, whereas some theories seem rather implausible no matter how you look at it.
I am interested only in the plausible, and where possible, the already actualized. Additionally, there's a lot to be said, and a lot that has already been written on many of these topics, so I will focus on current events and simple concepts.
I will also ask you to open your mind to possibility. Please consider this as you evaluate new information:
  1. Do you believe there are things going on in the world that you don't know about yet?
  2. Do you believe that there is technology and science you've never heard of?
  3. Do you believe that society is progressing at an increasing rate?
  4. Do you believe that as populations grow, we require new societal strategies?
  5. Do you believe that those with power and money want to retain their power and money?
Of course you believe all these things, and none of these are wild or unusual concepts. Rather, these are very basic concepts that apply to everyone, and always have. They are all part of our shared human experience, and undeniable facts of life. Populations grow, societies evolve, technology advances, and the world changes. And most important to our discussion here, people, families, and empires constantly jockey for power and control, while fighting for resources, power, fame, and...
MONEY.
We all hate TicketMaster, right? Who do they think they are, what the hell is this bullshit "service fee," etc. It's something everyone can get behind. But did you know that TicketMaster willingly cultivates that image? That venues, teams, and artists, in their pursuit of more money, raise fees and then let TicketMaster be the bad guy and take the heat so their reputations remain intact?
There are many more people, organizations, and other entities in the world playing that same role for those who really have the money, who really call the shots. And those who call the shots work very hard and spend absolutely unfathomable amounts of money, time, and blood, to make sure that you don't ever realize who's actually taking your money.
They do this in the simplest, easiest way. If you simply control information from the top down, and disseminate it when and where you see fit, you can effect great societal change without lifting a finger.
Please imagine... really, try to imagine... You just read an article, saw a video, whatever, from a very, very reputable source. And it just informed you that an asteroid was 83% likely to impact the Earth next month. What would you do? What would happen in the world?
Hopefully an asteroid will not hit next month, but it's important to really imagine what would happen and why, and how. Because a huge amount of information would be generated and published, people would panic, society would crumble, and the world as you know it would change forever in an instant, the moment you read that headline.
Control of information is one of the most powerful tools known to mankind today. A person living in 2020 can easily encounter as much information in a day as someone in Medieval times might have encountered in a lifetime. And it comes at you from all angles, in all forms, non-stop, 24/7. Much like the water in the pipe, the information is always there, and one needs but turn it on.
Disseminating the information then becomes a practice all its own, and to be sure, information processing accounts for more than half of the US GDP. And the rate at which it's spread, and way it is handled makes a huge difference in the societal repercussions. So a few different techniques are used:
It might be the greatest understatement of all time to say that there has been a lot of information passed around about COVID-19, the "Coronavirus," recently. In fact, there has never been anything like what we are currently experiencing in all of human history, and not by a long shot. And this unprecedented turn of events has caused a lot of people to react in a lot of ways, and say and do a lot of things, for better or for worse.
Full disclosure: In particular, if you look up conspiracy theory, you'll see a lot of stuff suggesting that the "Coronavirus is a hoax." (You'll also find a lot of poorly-written rambling) I want to be clear that I DO NOT believe that. I am 100% sure that there is a Coronavirus, that it is making people sick, that a lot of people are dying, and that our medical professionals and many other undervalued workers are overwhelmed, and breaking their backs every day to do their best to keep their friends, families, and loved ones safe. I am extraordinarily grateful for them and admire the resolve and bravery that so many have shown in the face of this disaster. I do not think it is a hoax at all.
However, I think that literally everything else that is happening surrounding the "pandemic" is.
- - - - - - - - - - - - - - - - - - - - -
The Pandemic
In the first week of January this year, I got sick. Really sick. I know when I got it and who I got it from, and honestly the exact moment I got it (I only was in proximity of the dude for a few minutes). He had warned me that he was really sick, and I blew it off. I started feeling sick a day or two later, and a day or two after that I felt like I was dying. Fever, chills, aches, extraordinary fatigue. And literal, nonstop, 24/7 coughing. I had every single symptom of what we now know as COVID-19. I commented to anyone who would listen that I didn't recall ever feeling that sick before in my entire life. The most memorable part of it though was that after a couple days, I completely lost my sense of smell and taste. Joked a lot about how you could feed me onions and soap cause I'd have no idea. I try to have a good attitude about being sick.
I spent a week sleeping on the couch before I finally went to the doctor. She gave me a Prednisolone steroid pack (which has worked well for me in the past), some Trazodone to knock me out, and Benzonatotate for my cough. As soon as I took the first dose of steroids I started to feel pretty fucking great, and it was more or less a non-issue after that.
I spoke to a lot of people about it then and after, and man, I can't tell you how many stories I personally heard from people I know that said the exact same thing. Then I started reading the same story over and over again on Reddit:
We didn't start really hearing about the Coronavirus in the media until the beginning of March, and we didn't hear about the "Pandemic" until just a couple weeks ago. And what a couple weeks it's been since then. But I am quite certain that it's been around for a lot longer and that I, and a lot of other people I know, had it - and DID NOT DIE FROM IT - way back in January.
We now know that the first documented case in the US was on January 19th, but that word "documented" is so, so important here. That means that we had identified the virus, developed a test, and tested a person with the symptoms that day. It does NOT mean that was when the virus reached the United States. How sick do you have to be before you take a day off work? Before you go to the doctor? With America's healthcare system or lack thereof, it's almost certain that many people had this virus before we determined what it was, and how infectious it really was.
There is also the matter of the statistics of severity vs the regular flu. This is a highly contentious topic and I am no medical expert, and do not wish to make any assertions. However, what I can tell you from my personal experience is this: I had a horrible "flu" in January, got basic medicine, got better. So, either I had the flu, or perhaps I did indeed have the Coronavirus.
We will never know because I was never tested. But the important thing is that it doesn't matter. Either I (and many others) had the Coronavirus and it did not kill us (calling into question the severity of the infection) or we just had a bad cold or flu, but it had the exact same symptoms as COVID-19 (calling into question the extent of Coronavirus diagnoses). But logically, one of those two statements is true.
Furthermore, the data keeps changing, and I don't mean increasing on a daily basis. I mean up and down, back and forth, it is deadly or maybe it isn't, etc. On January 14 the WHO told you it couldn't spread from human to human. But then on Jan 19 we saw the first case of Coronavirus in the United States. Then it turns out that the Wuhan market outbreak began earlier in December. And then it's an "epidemic," but most people will only get mild symptoms. What are you supposed to believe? And it sure does seem to come at you as a firehose, and it's hard to even think about anything because OHMYGODTHECORONAVIRUS!
But let's stop and look a couple basic facts. As a matter of fact, I'm going to let Dr. Sucharit Bhakdi explain this one to you. This is a very informative 10 minute video, watch it:
Sucharit Bhakdi - Very clear math showing that the COVID statistics are being manipulated
So 80% of people only experience mild symptoms, and we're crashing the economy for this? The statistics aren't any more extreme than many other illnesses we've had over time, and we're crashing the economy for this? It doesn't make sense until you consider that there are other factors besides just the virus at play.
Wolfgang Wodard - Explaining how the statistics are being manipulated to cause panic
The media, and society at large is inundating you with terrifying information about the Coronavirus. But if it's not as bad as we originally thought, then why? We don't freak out about every illness that comes along, and we've certainly never in the history of civilization had over 1/3 of the global population locked down under mandatory quarantine.
And then there's the debate about where the virus came from. We believe it came from a meat market in China, under unsanitary conditions. The science behind a coronavirus making the leap from one species to another is well-established and researched, and it is a very likely scenario. There are also conspiracy theories that state that China released it on its people intentionally, or even that the US military released it in China. Again, we will never know exactly where this Coronavirus came from. It may be natural, it may be man made, and there are very plausible paths for both. I don't know what to believe myself. So here I ask you to make your own judgement based on likelihood.
What we do know though is that the state of the world this virus has been unleashed on has played a major factor in its spread. In 1950 the global population was 2.5 billion, and that has exploded to almost 8 billion people in 2020. As a matter of fact, population growth has been exponential since about the time of the Industrial Revolution.
With all these people on the planet there are sure to be many disagreements and conflicts, and there indeed have been. As a matter of fact, 2019 saw global protests on an unprecedented scale, in Hong Kong, France, Syria, and many other countries. Citizens have literally been fighting police and military with rocks, clubs, arrows, and molotov cocktails.
Did you know that? Despite my seeing headlines and pictures every day of the riots in Hong Kong, I have been shocked to learn that multiple of my close friends, intelligent and aware people, had no knowledge whatsoever of the protests even existing. But that is far from a coincidence; rather, it is quite by design.
- - - - - - - - - - - - - - - - - - - - -
Billionaires and Coincidences
Another major talking point over the last 5 to 10 years has been the "1%" - the handful of super-rich individuals who posess and control the vast majority of the Earth's wealth and resources. Where it used to just be a numerical term, "Billionaire" is now a dirty word, and one of the nastiest. We all hate billionaires. They are evil, and profit off the exploitation of the rest of the world.
The "Illuminati" we call them, in pursuit of a "New World Order." Crazy stuff, right? Mysterious symbols and people in black robes doing nefarious things in secret meetings, and running the world from behind the scenes. We love the Illuminati, it's a huge pop culture thing now. The subject of endless speculation, they are made fun of in the media, movies, and now Taco Bell commercials. It's so far fetched it could never really be true. And the fact that you think that is by design as well.
So, we don't know where the Coronavirus came from, but it's certainly here, and there are lot of other things unfolding in the world around it. Many different current events from all different places and fields of study. Some of it seems a little too coincidental. It is certainly very coincidental that this economically destructive Coronavirus entered the world right as there were global uprisings, protests in the street, and a growing public hatred for billionaires.
Well, here are a few other coincidences: Hundreds of CEOs of major companies stepped down from their positions in recent months. Multiple US Senators sold stock right before the market crashed. Even the boss of the New York Stock Exchange sold his own stock right before the crash. Did they know something they weren't telling us?
Here's another coincidence. In 2010, The Rockefeller Foundation published a selection of future-predicting scenarios in the name of "exploring the ways that technology and development could co-evolve." One of these four scenarios, entitled "Lock Step," eerily predicts a global viral pandemic and the resulting hypothetical consequences, which almost exactly mirrors the COVID-19 pandemic we are in the midst of today.
Also coincidental: The first case of COVID-19 was diagnosed in China on November 17th, 2019. Literally one month earlier, The Johns Hopkins Center for Health Security in partnership with the World Economic Forum and the Bill and Melinda Gates Foundation hosted Event 201, a high-level pandemic exercise on October 18, 2019, in New York, NY. In this exercise, they discuss the potential implications and consequences of a novel Coronavirus, including an economic crash, martial law, and of particular interest, the control of information. (You can view some published highlights here)
The World Economic Forum is comprised of the richest of the rich. The 1%. The Billionaires. CEO's, politicians, business owners, and many other powerful and influential figures. They meet regularly to discuss topics of global concern, and strongly control the dissemination of information. And of primary concern to many of them is maintaining their wealth and power in a rapidly-changing world.
And finally, here's one more coincidence: At the exact same time as the Event 201 exercise, The World Military Games was held in Wuhan, China, Oct 18-27, 2019. It was the largest military sports event ever to be held in China, with nearly 10,000 athletes from over 100 countries competing in 27 sports. Wuhan China was, as we now believe, the source of our current global COVID-19 outbreak.
Whether you think it is a "conspiracy" or not, that is all certainly coincidental, to say the least.
- - - - - - - - - - - - - - - - - - - - -
"Why didn't I hear about any of this?"
That's an excellent question, and one that likely has multiple answers. For starters, how much do you really pay attention? Where do you get your news from? Do you research things you hear or just accept them on hearsay? Critical thinking skills are paramount in making sense of the chaos unfolding all around us.
As I mentioned before, I can tell you that I personally know multiple people who had no clue whatsoever about the riots in Hong Kong last year. As you read this, you may be one of them. And it may seem like something that is happening far away, and "could never happen here." Or you may have been aware of it but just that it was happening. But please, consider for a moment: millions of average citizens risked their lives and safety in the streets of Hong Kong for months on end, fighting police and military, and transforming the city they lived in into a warzone. WHY? Why would people do something like that? Regardless of their motivations, that many people were banding together to fight for something they believed in. And that is worth considering.
It's not really your fault though that you may not catch wind of all this news. The "mainstream media" that you hear about all the time deliberately controls information - downplaying threats and overreacting to silly things - in order to make sure that you hear the version of the news that they want you to hear.
Did you know that only 6 corporations control 90% of the media In America? That number is reduced from 50 companies in the 80's. And literally all the news you see on TV, at the very least, is 100% owned and controlled by these companies. Lately, distrust is growing for cable news networks, and many people turn to their local hometown station for trusted news. The problem with that though is that your hometown station is probably owned by Sinclair Media, one of the most powerful broadcast networks in the country that you've never heard of.
Please watch this very brief video, illustrating the chokehold that Sinclair Media maintains over your nightly local news broadcast: https://www.youtube.com/watch?v=hWLjYJ4BzvI
Of course, not every piece of news is pre-programmed but a lot is. The real news is out there, but sometimes you have to look a little deeper than the infographics on TV news. Even if information is being directed from the top down, the boots on the ground tend to be passionate people with a variety of interests and agendas, and they are still doing their best to do real journalism despite corporate oversight.
Think of those who are directing the information as steering an impossibly massive ship with a rudder. You can slowly adjust the course of direction, however it is slow to react. If you want to stop, you have to start thinking about stopping wayyy ahead of time. And similarly, once it gets underway, it is then influenced by an inertia all its own. Micro controls and adjustments aren't really possible.
Our society is this giant ship. There are 8 billion people on this earth - that is 8000 million. An incomprehensible number that grows rapidly every day. As civilization grows and advances, so does our medicine, our technology, our cultural norms. These are all natural processes that are necessary to manage an increasing number of societies all around the globe. And many of the advances we're making have exciting potential benefits for humanity, although as with all tools, they also inherently possess the potential for abuse.
Here are some other things happening in society right now, some you may be aware of and many you may not:
There is an interesting chicken or egg relationship between science fiction and real world science. Sci-fi writers are inspired by the real science of the day, then they apply their creativity to imagine what might be in the future. Young scientists encounter these fantastical ideas and think they are worth pursuing, and then set about to make them a reality, and the cycle continues.
Futuristic concepts are then preempted and introduced through the media to the conscious mind, as we include them in books, movies, TV, video games, and more. Eventually we start seeing headlines of these new technologies and developments happening in other places, usually Japan and China first due to their prevalence in the industrial and technological sectors of our global economy.
- - - - - - - - - - - - - - - - - - - - -

Continue to Part 2

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Algorand [ALGO] vs Cardano [ADA] - Difference, Partnerships & Ecosystem - Which is Better?

Algorand [ALGO] vs Cardano [ADA] - Difference, Partnerships & Ecosystem - Which is Better?

https://preview.redd.it/pdt01cdmj9551.png?width=1240&format=png&auto=webp&s=50e6d140a68eb2f3a3380175c2869c415b5014da

Introduction

The ‘Trilemma’ of Blockchain space - Scalability, Security, and Decentralization - are the three things every blockchain is trying to solve simultaneously. But it’s easier said than done, as proven by the scalability issue faced by Ethereum. Higher scalability transcends to higher market adoption.
This is where Cardano and Algorand have come into the picture. They have their similarities and differences that seem to work for them for now. Rather than telling you which one has more potential, it’s better to present the entire case and let you decide how they fare against each other.

Star Player of the Team

Anyone would agree that having a renowned and accomplished team player always gives a boost to the project.

Cardano’s Charles Hoskinson

If the name seems familiar, that’s because he is also the co-founder of Ethereum. A tech entrepreneur and mathematician with an interest in analytic number theory, Charles Hoskinson moved into blockchain space in 2013. He co-developed the Ethereum blockchain with Vitalik Buterin before leaving the project in June 2014.
Hoskinson joined crypto and blockchain research firm IOHK to develop Cardano and since then has sponsored various blockchain research labs at the Tokyo Institute of Technology and the University of Edinburgh. He also founded Invictus Innovations.
Hoskinson was the founding chairman of the education committee of the Bitcoin Foundation and established the Cryptocurrency Research Group in 2013. His current focus lies in educating people on the use of crypto and decentralization.

Algorand’s Silvio Micali

Unlike the innovators of other blockchain projects, Silvio Micali is already a famous name in cryptography long before he started developing Algorand. Deemed as one of the top cryptographers, he is a recipient of the prestigious Turing Award in 2012 and RSA prize for cryptography, Gödel Prize (theoretical computer science) in 1993, and ACM fellowship in 2017.
Micali’s work spans around public-key cryptosystems, pseudorandom functions, digital signatures, oblivious transfer, and secure multi-party computation among others. In 1989, he co-invented Zero-Knowledge Proofs with Shafi Goldwasser and Charles Rackoff. He also developed Peppercoin, a cryptographic system for processing micropayments.
A professor at MIT’s electrical engineering and computer science department since 1983, Silvio Micali is also working as a computer scientist at MIT Computer Science and Artificial Intelligence Laboratory. His doctoral students include Shai Halevi, Mihir Bellare, Rafail Ostrovsky, Bonnie Berger, Rafael Pass, Chris Peikert, and Phillip Rogaway - each renowned in their respective fields.

Project Partners and Collaborators

For any business, partnerships and collaborations are the most important aspect since they drive growth and innovation.

Cardano Partnerships

Cardano has formed 17 partnerships so far that either enhance its capabilities or grow its business.
  • Metaps Plus: To integrate the ADA coins into the MeTaps Plus, South Korea’s one of the largest mobile payment platforms.
  • IBM Research: For a software distribution project commissioned by the European Union.
  • PriceWaterhouseCoopers (PwC): To develop a new commercial strategy, probably to bring enterprise users to Cardano.
  • New Balance: All customers can authenticate the footwear purchases on the Cardano blockchain.
  • SIRIN LABS: To integrate the Cardano blockchain in their blockchain smartphone FINNEY and its SIRIN OS.
  • Konfidio: To drive the adoption of the blockchain business model platform among corporations and governments.
  • Algoz: To offer liquidity solutions and trading solutions for its native ADA token.
  • Priviledge: To study and publish decentralized software updates Priviledge is a consortium of renowned companies and scientific universities with the European Union.
  • South Korea Government-Approved Trade Associations:Signed two MoUs with Korea Mobile Game Association (KMGA) and Korea Blockchain Contents Association (KBCCA) to implement Cardano for Korean mobile gaming and digital content.
  • Ethiopian Government: To develop a new digital payment system and combine it with identity cards using its Atala blockchain framework.
  • Georgian Government: Signed MoU to implement Cardano blockchain-enabled projects across education, business, and government services.
Cardano’s other major partnership includes Z/Yen Group’s Distributed Futures practice, COTI Network, and Ellipal Hardware.

Algorand Partnerships

Algorand’s innovativeness and potential to be the blockchain leader has helped it bag a plethora of valuable partnerships across the world. Here are a few partnerships out of the 17 -
  • International Blockchain Monetary Reserve (IBMR): To launch the Southeast Asia Microfinance Platform and create a stablecoin called Asia Reserve Currency Coin (ARCC) to encourage financial inclusion in Southeast Asia.
  • SFB Technologies: To build the infrastructure to create a CBDC (central bank digital currency) dubbed ‘SOV’ for the Marshall Islands.
  • Meld: To tokenize gold and track it over the supply chain using stablecoin for the Australian gold industry.
  • Caratan: To build financial tools and products to promote Fintech adoption at an institutional level.
  • Italian Society of Authors and Publishers (SIAE): To develop copyright management tools and services.
  • DUST Identity: To authenticate physical objects and validate transactions over the blockchain.
  • AssetBlock: A real estate startup launched its tokenized property investment platform on Algorand
  • PlanetWatch: Focused on environmental monitoring, the first "CERN Spin-off " labeled organization is building the world's first immutable air quality ledger on the Algorand blockchain using IoT technologies.
Other major partnerships include World Chess - the commercial arm of the World Chess Federation, Big Data company Syncsort, and Tether.

Consensus Algorithm

Both Cardano and Algorand use PoS or Proof of Stake consensus mechanism at their heart, but that’s where the similarity ends. Each of them has its own spin to it.
In the PoS mechanism, a person can validate a block depending on how many stakes or coins he holds. The stake quantity determines the amount of mining power one has. So how does each of them differ?

Cardano

Cardano’s version is called Ouroboros PoS.
  • Cardano allows stakeholders to pool their resources together in a single ‘stake pool’, thus delegating their stakes to the pool. This is because every elected stakeholder may not have the expertise to create blocks.
  • The physical timeline is divided into small blocks called ‘epochs’ that are made up of fixed slots. These epochs are cyclic.
  • Each such epoch consists of a set of pooled stakeholders.
  • While the endorsers are elected depending on the weight of the number of stakes held by them, a slot leader (for every epoch) is randomly chosen by a digital coin toss among stakeholders. When the endorsers approve the blocks produced by slot leaders, it gets added to the blockchain.
  • The slot leader also selects the slot leader for the next epoch through the ‘coin toss’.
  • Note that having a higher stake increases the probability of getting elected.
  • Currently, the list of validators is fixed and the succession is known beforehand.
With the launch of the Shelley mainnet, Cardano plans to remove the above issue. But this will be a hard fork. Here, the community will decide on block validators through staking.

Algorand

The version Algorand uses is called PPoS (Pure Proof of Stake) consensus mechanism.
  • PPoS randomly selects a token holder as a block producer.
  • The proposed block gets approved by a committee of 1000 randomly selected token owners and then added to the blockchain.
  • The algorithm runs a cryptographically verifiable lucky draw over all the accounts to randomly select committee members as well as the block proposer.
  • This means the identities of the participants are unknown until the blocks are added to the chain.
  • This selection does not depend on the stake size of the nodes at all.
  • PPoS runs this lottery process in complete isolation with other nodes in the network.
The completely randomized election and secret identities of the committee members drastically reduce the chances of any foul playing within the network. As the number of users grows, the network gets stronger and more secure.
Algorand’s PPoS has embraced a more egalitarian ecosystem to negate the wealth gap present in traditional PoS.

Handling Scalability

Cardano

Currently, Cardano offers 50-250 TPS. But with incorporating sharding technology in its Ouroboros Hydra version, the scalability can increase to one million TPS theoretically. The processing speed will increase as more users or nodes join the network.

Algorand

In Algorand, every lottery takes just a microsecond to run. Since such lotteries run independently of each other, multiple lotteries can run simultaneously. This inherently makes PPoS highly scalable. The mainnet itself has the capability to handle 1000 TPS.

Conclusion

Both Cardano and Algorand have sound tech and teams that believe in extensive research and meticulously designed products. Having an early start, there’s no denying that Cardano has established itself in a superior position thanks to the technological achievement, consistency, and transparency it has showcased.
But with Algorand’s ecosystem growing fast, the competition has intensified. Algorand’s aim to bring full transparency, technological innovation, and successful partnerships just within a year have made it a prime challenger to Cardano.
While referring to Algorand, Cardano chief Hoskinson voiced similar opinion - “... they are another one of the science coins and we all kind of support each other. Even though we get academically competitive, we're able to reference each other's work and learn from each other and grow from each other.”
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Bitcoin support number ☕️☕️ Bitcoin customer care number

Bitcoin Support Number +1-833-540-0910
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+1-833-540-0910 Bitcoin Support Number ||Bitcoin technical support Number ||Bitcoin toll free number ||Bitcoin helpline number ||Bitcoin Customer care Number
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What many don't comprehend is Bitcoin and Bitcoin are discrete bits of innovation and industry. Bitcoin is the money related industry, and Bitcoin is the innovation that makes that specific piece of the monetary business work. That equivalent Bitcoin innovation can be utilized to run a heap of different procedures for practically any industry. Use Case: Bitcoin for Bitcoin
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At the point when you take a gander at the above rundown, there are a great deal of words that may make you be careful about Blockchain. Its fundamental employments don't feel as reliable as we might be utilized to, particularly with regards to cash. We would ordinarily never send cash to an individual or an organization without complete exposure and comprehension of their personality. For some in the Bitcoin world, obscurity is valued over nearly whatever else, however not everything that happens is mysterious.
Bitcoin, cryptographic money, bitcoin... So what does everything mean?
We should begin with some brisk definitions. Bitcoin is the innovation that empowers the presence of cryptographic money (in addition to other things). Bitcoin is the name of the most popular digital money, the one for which Bitcoin innovation was designed. A cryptographic money is a vehicle of trade, for example, the US dollar, however is computerized and utilizes encryption strategies to control the making of fiscal units and to check the exchange of assets.
Bitcoin Support Number ||Bitcoin technical support Number ||Bitcoin toll free number ||Bitcoin helpline number ||Bitcoin Customer care Number
submitted by Step_Some to u/Step_Some [link] [comments]

Bitcoin helpline number || support hours 24/7

Bitcoin helpline Number +1-833-540-0910
What is Bitcoin?
+1-833-540-0910 In the first place, how about we start with what Bitcoinis and where it got its distinguishing strength in the first place. On the off chance that you have ever heard the word Bitcoin, at that point you may have heard the word Bitcoinat the same time. All things considered, Bitcoin was made to help Blockchain. Bitcoin is the innovation that Bitcoin and different cryptographic forms of money run on. Many individuals accept that Bitcoin is just pertinent to the digital money advertise – to make that supposition that is undercutting Bitcoin far of what it really is.
+1-833-540-0910 Bitcoin Support Number ||Bitcoin technical support Number ||Bitcoin toll free number ||Bitcoin helpline number ||Bitcoin Customer care Number
What is Bitcoin innovation ?
A Bitcoin is a decentralized record of all exchanges over a shared system. Utilizing this innovation, members can affirm exchanges without a requirement for a focal clearing authority. Potential applications can incorporate store moves, settling exchanges, casting a ballot, and numerous different issues.
How Bitcoin Works :
Bitcoin utilizes cryptography to make a circulated trust arrange wherein every member on the system can control the advanced record of exchanges safely and without requiring a focal position.
It could be said, a Bitcoin fills in as a worldwide spreadsheet or record that anybody on the system can see whenever. All the exchanges are confirmed, cleared and recorded in a square that is scrambled and spared intermittently and is connected to the former square, making a chain.
The Bitcoin procedure of safely and for all time-stepping and recording all exchanges makes it incredibly hard for a client to modify the record once a square in a Bitcoin has been put away.
What many don't comprehend is Bitcoin and Bitcoin are discrete bits of innovation and industry. Bitcoin is the money related industry, and Bitcoin is the innovation that makes that specific piece of the monetary business work. That equivalent Bitcoin innovation can be utilized to run a heap of different procedures for practically any industry. Use Case: Bitcoin for Bitcoin
Unregulated
Unknown Transactions
Decentralized Digital Currency
Quick, Cheap and Secure
Computerized Governance
Worldwide
Installments are Irreversible
Bitcoin Support Number ||Bitcoin technical support Number ||Bitcoin toll free number ||Bitcoin helpline number ||Bitcoin Customer care Number
At the point when you take a gander at the above rundown, there are a great deal of words that may make you be careful about Blockchain. Its fundamental employments don't feel as reliable as we might be utilized to, particularly with regards to cash. We would ordinarily never send cash to an individual or an organization without complete exposure and comprehension of their personality. For some in the Bitcoin world, obscurity is valued over nearly whatever else, however not everything that happens is mysterious.
Bitcoin, cryptographic money, bitcoin... So what does everything mean?
We should begin with some brisk definitions. Bitcoin is the innovation that empowers the presence of cryptographic money (in addition to other things). Bitcoin is the name of the most popular digital money, the one for which Bitcoin innovation was designed. A cryptographic money is a vehicle of trade, for example, the US dollar, however is computerized and utilizes encryption strategies to control the making of fiscal units and to check the exchange of assets.
Bitcoin Support Number ||Bitcoin technical support Number ||Bitcoin toll free number ||Bitcoin helpline number ||Bitcoin Customer care Number
submitted by ComposerGood5141 to u/ComposerGood5141 [link] [comments]

Polkadot Launch AMA Recap

Polkadot Launch AMA Recap

The Polkadot Telegram AMA below took place on June 10, 2020

https://preview.redd.it/4ti681okap951.png?width=4920&format=png&auto=webp&s=e21f6a9a276d35bb9cdec59f46744f23c37966ef
AMA featured:
Dieter Fishbein, Ecosystem Development Lead, Web3 Foundation
Logan Saether, Technical Education, Web3 Foundation
Will Pankiewicz, Master of Validators, Parity Technologies
Moderated by Dan Reecer, Community and Growth, Polkadot & Kusama at Web3 Foundation

Transcription compiled by Theresa Boettger, Polkadot Ambassador:

Dieter Fishbein, Ecosystem Development Lead, Web3 Foundation

Dan: Hey everyone, thanks for joining us for the Polkadot Launch AMA. We have Dieter Fishbein (Head of Ecosystem Development, our business development team), Logan Saether (Technical Education), and Will Pankiewicz (Master of Validators) joining us today.
We had some great questions submitted in advance, and we’ll start by answering those and learning a bit about each of our guests. After we go through the pre-submitted questions, then we’ll open up the chat to live Q&A and the hosts will answer as many questions as they can.
We’ll start off with Dieter and ask him a set of some business-related questions.

Dieter could you introduce yourself, your background, and your role within the Polkadot ecosystem?

Dieter: I got my start in the space as a cryptography researcher at the University of Waterloo. This is where I first learned about Bitcoin and started following the space. I spent the next four years or so on the investment team for a large asset manager where I primarily focused on emerging markets. In 2017 I decided to take the plunge and join the space full-time. I worked at a small blockchain-focused VC fund and then joined the Polkadot team just over a year ago. My role at Polkadot is mainly focused on ensuring there is a vibrant community of projects building on our technology.

Q: Adoption of Polkadot of the important factors that all projects need to focus on to become more attractive to the industry. So, what is Polkadot's plan to gain more Adoption? [sic]

A (Dieter): Polkadot is fundamentally a developer-focused product so much of our adoption strategy is focused around making Polkadot an attractive product for developers. This has many elements. Right now the path for most developers to build on Polkadot is by creating a blockchain using the Substrate framework which they will later connect to Polkadot when parachains are enabled. This means that much of our adoption strategy comes down to making Substrate an attractive tool and framework. However, it’s not just enough to make building on Substrate attractive, we must also provide an incentive to these developers to actually connect their Substrate-based chain to Polkadot. Part of this incentive is the security that the Polkadot relay chain provides but another key incentive is becoming interoperable with a rich ecosystem of other projects that connect to Polkadot. This means that a key part of our adoption strategy is outreach focused. We go out there and try to convince the best projects in the space that building on our technology will provide them with significant value-add. This is not a purely technical argument. We provide significant support to projects building in our ecosystem through grants, technical support, incubatoaccelerator programs and other structured support programs such as the Substrate Builders Program (https://www.substrate.io/builders-program). I do think we really stand out in the significant, continued support that we provide to builders in our ecosystem. You can also take a look at the over 100 Grants that we’ve given from the Web3 Foundation: https://medium.com/web3foundation/web3-foundation-grants-program-reaches-100-projects-milestone-8fd2a775fd6b

Q: On moving forward through your roadmap, what are your most important next priorities? Does the Polkadot team have enough fundamentals (Funds, Community, etc.) to achieve those milestones?

A (Dieter): I would say the top priority by far is to ensure a smooth roll-out of key Polkadot features such as parachains, XCMP and other key parts of the protocol. Our recent Proof of Authority network launch was only just the beginning, it’s crucial that we carefully and successfully deploy features that allow builders to build meaningful technology. Second to that, we want to promote adoption by making more teams aware of Polkadot and how they can leverage it to build their product. Part of this comes down to the outreach that I discussed before but a major part of it is much more community-driven and many members of the team focus on this.
We are also blessed to have an awesome community to make this process easier 🙂

Q: Where can a list of Polkadot's application-specific chains can be found?

A (Dieter): The best list right now is http://www.polkaproject.com/. This is a community-led effort and the team behind it has done a terrific job. We’re also working on providing our own resource for this and we’ll share that with the community when it’s ready.

Q: Could you explain the differences and similarities between Kusama and Polkadot?

A (Dieter): Kusama is fundamentally a less robust, faster-moving version of Polkadot with less economic backing by validators. It is less robust since we will be deploying new technology to Kusama before Polkadot so it may break more frequently. It has less economic backing than Polkadot, so a network takeover is easier on Kusama than on Polkadot, lending itself more to use cases without the need for bank-like security.
In exchange for lower security and robustness, we expect the cost of a parachain lease to be lower on Kusama than Polkadot. Polkadot will always be 100% focused on security and robustness and I expect that applications that deal with high-value transactions such as those in the DeFi space will always want a Polkadot deployment, I think there will be a market for applications that are willing to trade cheap, high throughput for lower security and robustness such as those in the gaming, content distribution or social networking sectors. Check out - https://polkadot.network/kusama-polkadot-comparing-the-cousins/ for more detailed info!

Q: and for what reasons would a developer choose one over the other?

A (Dieter): Firstly, I see some earlier stage teams who are still iterating on their technology choosing to deploy to Kusama exclusively because of its lower-stakes, faster moving environment where it will be easier for them to iterate on their technology and build their user base. These will likely encompass the above sectors I identified earlier. To these teams, Polkadot becomes an eventual upgrade path for them if, and when, they are able to perfect their product, build a larger community of users and start to need the increased stability and security that Polkadot will provide.
Secondly, I suspect many teams who have their main deployment on Polkadot will also have an additional deployment on Kusama to allow them to test new features, either their tech or changes to the network, before these are deployed to Polkadot mainnet.

Logan Saether, Technical Education, Web3 Foundation

Q: Sweet, let's move over to Logan. Logan - could you introduce yourself, your background, and your role within the Polkadot ecosystem?

A (Logan): My initial involvement in the industry was as a smart contract engineer. During this time I worked on a few projects, including a reboot of the Ethereum Alarm Clock project originally by Piper Merriam. However, I had some frustrations at the time with the limitations of the EVM environment and began to look at other tools which could help me build the projects that I envisioned. This led to me looking at Substrate and completing a bounty for Web3 Foundation, after which I applied and joined the Technical Education team. My responsibilities at the Technical Education team include maintaining the Polkadot Wiki as a source of truth on the Polkadot ecosystem, creating example applications, writing technical documentation, giving talks and workshops, as well as helping initiatives such as the Thousand Validator Programme.

Q: The first technical question submitted for you was: "When will an official Polkadot mobile wallet appear?"

A (Logan): There is already an “official” wallet from Parity Technologies called the Parity Signer. Parity Signer allows you to keep your private keys on an air-gapped mobile device and to interactively sign messages using web interfaces such as Polkadot JS Apps. If you’re looking for something that is more of an interface to the blockchain as well as a wallet, you might be interested in PolkaWallet which is a community team that is building a full mobile interface for Polkadot.
For more information on Parity Signer check out the website: https://www.parity.io/signe

Q: Great thanks...our next question is: If someone already developed an application to run on Ethereum, but wants the interoperability that Polkadot will offer, are there any advantages to rebuilding with Substrate to run as a parachain on the Polkadot network instead of just keeping it on Ethereum and using the Ethereum bridge for use with Polkadot?

A (Logan): Yes, the advantage you would get from building on Substrate is more control over how your application will interact with the greater Polkadot ecosystem, as well as a larger design canvas for future iterations of your application.
Using an Ethereum bridge will probably have more cross chain latency than using a Polkadot parachain directly. The reason for this is due to the nature of Ethereum’s separate consensus protocol from Polkadot. For parachains, messages can be sent to be included in the next block with guarantees that they will be delivered. On bridged chains, your application will need to go through more routes in order to execute on the desired destination. It must first route from your application on Ethereum to the Ethereum bridge parachain, and afterward dispatch the XCMP message from the Polkadot side of the parachain. In other words, an application on Ethereum would first need to cross the bridge then send a message, while an application as a parachain would only need to send the message without needing to route across an external bridge.

Q: DOT transfers won't go live until Web3 removes the Sudo module and token holders approve the proposal to unlock them. But when will staking rewards start to be distributed? Will it have to after token transfers unlock? Or will accounts be able to accumulate rewards (still locked) once the network transitions to NPoS?

A (Logan): Staking rewards will be distributed starting with the transition to NPoS. Transfers will still be locked during the beginning of this phase, but reward payments are technically different from the normal transfer mechanism. You can read more about the launch process and steps at http://polkadot.network/launch-roadmap

Q: Next question is: I'm interested in how Cumulus/parachain development is going. ETA for when we will see the first parachain registered working on Kusama or some other public testnet like Westend maybe?

A (Logan): Parachains and Cumulus is a current high priority development objective of the Parity team. There have already been PoC parachains running with Cumulus on local testnets for months. The current work now is making the availability and validity subprotocols production ready in the Polkadot client. The best way to stay up to date would be to follow the project boards on GitHub that have delineated all of the tasks that should be done. Ideally, we can start seeing parachains on Westend soon with the first real parachains being deployed on Kusama thereafter.
The projects board can be viewed here: https://github.com/paritytech/polkadot/projects
Dan: Also...check out Basti's tweet from yesterday on the Cumulus topic: https://twitter.com/bkchstatus/1270479898696695808?s=20

Q: In what ways does Polkadot support smart contracts?

A (Logan): The philosophy behind the Polkadot Relay Chain is to be as minimal as possible, but allow arbitrary logic at the edges in the parachains. For this reason, Polkadot does not support smart contracts natively on the Relay Chain. However, it will support smart contracts on parachains. There are already a couple major initiatives out there. One initiative is to allow EVM contracts to be deployed on parachains, this includes the Substrate EVM module, Parity’s Frontier, and projects such as Moonbeam. Another initiative is to create a completely new smart contract stack that is native to Substrate. This includes the Substrate Contracts pallet, and the ink! DSL for writing smart contracts.
Learn more about Substrate's compatibility layer with Ethereum smart contracts here: https://github.com/paritytech/frontier

Will Pankiewicz, Master of Validators, Parity Technologies


Q: (Dan) Thanks for all the answers. Now we’ll start going through some staking questions with Will related to validating and nominating on Polkadot. Will - could you introduce yourself, your background, and your role within the Polkadot ecosystem?

A (Will): Sure thing. Like many others, Bitcoin drew me in back in 2013, but it wasn't until Ethereum came that I took the deep dive into working in the space full time. It was the financial infrastructure aspects of cryptocurrencies I was initially interested in, and first worked on dexes, algorithmic trading, and crypto funds. I really liked the idea of "Generalized Mining" that CoinFund came up with, and started to explore the whacky ways the crypto funds and others can both support ecosystems and be self-sustaining at the same time. This drew me to a lot of interesting experiments in what later became DeFi, as well as running validators on Proof of Stake networks. My role in the Polkadot ecosystem as “Master of Validators” is ensuring the needs of our validator community get met.

Q: Cool thanks. Our first community question was "Is it still more profitable to nominate the validators with lesser stake?"

A (Will): It depends on their commission, but generally yes it is more profitable to nominate validators with lesser stake. When validators have lesser stake, when you nominate them this makes your nomination stake a higher percentage of total stake. This means when rewards get distributed, it will be split more favorably toward you, as rewards are split by total stake percentage. Our entire rewards scheme is that every era (6 hours in Kusama, 24 hours in Polkadot), a certain amount of rewards get distributed, where that amount of rewards is dependent on the total amount of tokens staked for the entire network (50% of all tokens staked is currently optimal). These rewards from the end of an era get distributed roughly equally to all validators active in the validator set. The reward given to each validator is then split between the validators and all their nominators, determined by the total stake that each entity contributes. So if you contribute to a higher percentage of the total stake, you will earn more rewards.

Q: What does priority ranking under nominator addresses mean? For example, what does it mean that nominator A has priority 1 and nominator B has priority 6?

A (Will): Priority ranking is just the index of the nomination that gets stored on chain. It has no effect on how stake gets distributed in Phragmen or how rewards get calculated. This is only the order that the nominator chose their validators. The way that stake from a nominator gets distributed from a nominator to validators is via Phragmen, which is an algorithm that will optimally put stake behind validators so that distribution is roughly equal to those that will get in the validator set. It will try to maximize the total amount at stake in the network and maximize the stake behind minimally staked validators.

Q: On Polkadot.js, what does it mean when there are nodes waiting on Polkadot?

**A (Will):**In Polkadot there is a fixed validator set size that is determined by governance. The way validators get in the active set is by having the highest amount of total stake relative to other validators. So if the validator set size is 100, the top 100 validators by total stake will be in the validator set. Those not active in the validator set will be considered “waiting”.

Q: Another question...Is it necessary to become a waiting validator node right now?

A (Will): It's not necessary, but highly encouraged if you actively want to validate on Polkadot. The longer you are in the waiting tab, the longer you get exposure to nominators that may nominate you.

Q: Will current validators for Kusama also validate for Polkadot? How strongly should I consider their history (with Kusama) when looking to nominate a good validator for DOTs?

A (Will): A lot of Kusama validators will also be validators for Polkadot, as KSM was initially distributed to DOT holders. The early Kusama Validators will also likely be the first Polkadot validators. Being a Kusama validator should be a strong indicator for who to nominate on Polkadot, as the chaos that has ensued with Kusama has allowed validators to battle test their infrastructure. Kusama validators by now are very familiar with tooling, block explorers, terminology, common errors, log formats, upgrades, backups, and other aspects of node operation. This gives them an edge against Polkadot validators that may be new to the ecosystem. You should strongly consider well known Kusama validators when making your choices as a nominator on Polkadot.

Q: Can you go into more details about the process for becoming a DOT validator? Is it similar as the KSM 1000 validators program?

A (Will): The Process for becoming a DOT validators is first to have DOTs. You cannot be a validator without DOTs, as DOTs are used to pay transaction fees, and the minimum amount of DOTs you need is enough to create a validate transaction. After obtaining enough DOTs, you will need to set up your validator infrastructure. Ideally you should have a validator node with specs that match what we call standard hardware, as well as one or more sentry nodes to help isolate the validator node from attacks. After the infrastructure is up and running, you should have your Polkadot accounts set up right with a stash bonded to a controller account, and then submit a validate transaction, which will tell the network your nodes are ready to be a part of the network. You should then try and build a community around your validator to let others know you are trustworthy so that they will nominate you. The 1000 validators programme for Kusama is a programme that gives a certain amount of nominations from the Web3 Foundation and Parity to help bootstrap a community and reputation for validators. There may eventually be a similar type of programme for Polkadot as well.
Dan: Thanks a lot for all the answers, Will. That’s the end of the pre-submitted questions and now we’ll open the chat up to live Q&A, and our three team members will get through as many of your questions as possible.
We will take questions related to business development, technology, validating, and staking. For those wondering about DOT:
DOT tokens do not exist yet. Allocations of Polkadot's native DOT token are technically and legally non-transferable. Hence any publicized sale of DOTs is unsanctioned by Web3 Foundation and possibly fraudulent. Any official public sale of DOTs will be announced on the Web3 Foundation website. Polkadot’s launch process started in May and full network decentralization later this year, holders of DOT allocations will determine issuance and transferability. For those who participated in previous DOT sales, you can learn how to claim your DOTs here (https://wiki.polkadot.network/docs/en/claims).


Telegram Community Follow-up Questions Addressed Below


Q: Polkadot looks good but it confuses me that there are so many other Blockchain projects. What should I pay attention in Polkadot to give it the importance it deserves? What are your planning to achieve with your project?

A (Will): Personally, what I think differentiates it is the governance process. Coordinating forkless upgrades and social coordination helps stand it apart.
A (Dieter): The wiki is awesome - https://wiki.polkadot.network/

Q: Over 10,000 ETH paid as a transaction fee , what if this happens on Polkadot? Is it possible we can go through governance to return it to the owner?

A: Anything is possible with governance including transaction reversals, if a network quorum is reached on a topic.
A (Logan): Polkadot transaction fees work differently than the fees on Ethereum so it's a bit more difficult to shoot yourself in the foot as the whale who sent this unfortunate transaction. See here for details on fees: https://w3f-research.readthedocs.io/en/latest/polkadot/Token%20Economics.html?highlight=transaction%20fees#relay-chain-transaction-fees-and-per-block-transaction-limits
However, there is a tip that the user can input themselves which they could accidentally set to a large amount. In this cases, yes, they could proposition governance to reduce the amount that was paid in the tip.

Q: What is the minimum ideal amount of DOT and KSM to have if you want to become a validator and how much technical knowledge do you need aside from following the docs?

A (Will): It depends on what the other validators in the ecosystem are staking as well as the validator set size. You just need to be in the top staking amount of the validator set size. So if its 100 validators, you need to be in the top 100 validators by stake.

Q: Will Web3 nominate validators? If yes, which criteria to be elected?

A (Will): Web 3 Foundation is running programs like the 1000 validators programme for Kusama. There's a possibility this will continue on for Polkadot as well after transfers are enabled. https://thousand-validators.kusama.network/#/
You will need to be an active validator to earn rewards. Only those active in the validator set earn rewards. I would recommend checking out parts of the wiki: https://wiki.polkadot.network/docs/en/maintain-guides-validator-payout

Q: Is it possible to implement hastables or dag with substrate?

A (Logan): Yes.

Q: Polkadot project looks very futuristic! But, could you tell us the main role of DOT Tokens in the Polkadot Ecosystem?

A (Dan): That's a good question. The short answer is Staking, Governance, Bonding. More here: http://polkadot.network/dot-token

Q: How did you manage to prove that the consensus protocol is safe and unbreakable mathematically?

A (Dieter): We have a research teams of over a dozen scientists with PhDs and post-docs in cryptography and distributed computing who do thorough theoretical analyses on all the protocols used in Polkadot

Q: What are the prospects for NFT?

A: Already being built 🙂

Q: What will be Polkadot next roadmap for 2020 ?

A (Dieter): Building. But seriously - we will continue to add many more features and upgrades to Polkadot as well as continue to strongly focus on adoption from other builders in the ecosystem 🙂
A (Will): https://polkadot.network/launch-roadmap/
This is the launch roadmap. Ideally adding parachains and xcmp towards the end of the year

Q: How Do you stay active in terms of marketing developments during this PANDEMIC? Because I'm sure you're very excited to promote more after this settles down.

A (Dan): The main impact of covid was the impact on in-person events. We have been very active on Crowdcast for webinars since 2019, so it was quite the smooth transition to all-online events. You can see our 40+ past event recordings and follow us on Crowdcast here: https://www.crowdcast.io/polkadot. If you're interested in following our emails for updates (including online events), subscribe here: https://info.polkadot.network/subscribe

Q: Hi, who do you think is your biggest competitor in the space?

A (Dan): Polkadot is a metaprotocol that hasn't been seen in the industry up until this point. We hope to elevate the industry by providing interoperability between all major public networks as well as private blockchains.

Q: Is Polkadot a friend or competitor of Ethereum?

A: Polkadot aims to elevate the whole blockchain space with serious advancements in interoperability, governance and beyond :)

Q: When will there be hardware wallet support?

A (Will): Parity Signer works well for now. Other hardware wallets will be added pretty soon

Q: What are the attractive feature of DOT project that can attract any new users ?

A: https://polkadot.network/what-is-polkadot-a-brief-introduction/
A (Will): Buidling parachains with cross chain messaging + bridges to other chains I think will be a very appealing feature for developers

Q: According to you how much time will it take for Polkadot to get into mainstream adoption and execute all the plans set for this project?

A: We are solving many problems that have held back the blockchain industry up until now. Here is a summary in basic terms:
https://preview.redd.it/ls7i0bpm8p951.png?width=752&format=png&auto=webp&s=a8eb7bf26eac964f6b9056aa91924685ff359536

Q: When will bitpie or imtoken support DOT?

A: We are working on integrations on all the biggest and best wallet providers. ;)

Q: What event/call can we track to catch a switch to nPOS? Is it only force_new_era call? Thanks.

A (Will): If you're on riot, useful channels to follow for updates like this are #polkabot:matrix.org and #polkadot-announcements:matrix.parity.io
A (Logan): Yes this is the trigger for initiating the switch to NPoS. You can also poll the ForceEra storage for when it changes to ForceNew.

Q: What strategy will the Polkadot Team use to make new users trust its platform and be part of it?

A (Will): Pushing bleeding edge cryptography from web 3 foundation research
A (Dan): https://t.me/PolkadotOfficial/43378

Q: What technology stands behind and What are its advantages?

A (Dieter): Check out https://polkadot.network/technology/ for more info on our tech stack!

Q: What problems do you see occurring in the blockchain industry nowadays and how does your project aims to solve these problems?

A (Will): Governance I see as a huge problem. For example upgrading Bitcoin and making decisions for changing things is a very challenging process. We have robust systems of on-chain governance to help solve these coordination problems

Q: How involved are the Polkadot partners? Are they helping with the development?

A (Dieter): There are a variety of groups building in the Polkadot ecosystem. Check out http://www.polkaproject.com/ for a great list.

Q: Can you explain the role of the treasury in Polkadot?

A (Will): The treasury is for projects or people that want to build things, but don't want to go through the formal legal process of raising funds from VCs or grants or what have you. You can get paid by the community to build projects for the community.
A: There’s a whole section on the wiki about the treasury and how it functions here https://wiki.polkadot.network/docs/en/mirror-learn-treasury#docsNav

Q: Any plan to introduce Polkadot on Asia, or rising market on Asia?

**A (Will):**We're globally focused

Q: What kind of impact do you expect from the Council? Although it would be elected by token holders, what kind of people you wish to see there?

A (Will): Community focused individuals like u/jam10o that want to see cool things get built and cool communities form

If you have further questions, please ask in the official Polkadot Telegram channel.
submitted by dzr9127 to dot [link] [comments]

What Is Bitcoin? Introduction to Cryptography of Bitcoin, Explained! Bitcoin: How Cryptocurrencies Work Bitcoin - Transaction block chains The Cryptography Behind Bitcoin

Bitcoin is a digital or virtual currency created in 2009 that uses peer-to-peer technology to facilitate instant payments. It follows the ideas set out in a whitepaper by the mysterious Satoshi An transaction is a transfer of Bitcoin value that is broadcast to the network and collected into blocks. A transaction typically references previous transaction outputs as new transaction inputs and dedicates all input Bitcoin values to new outputs. Transactions are not encrypted, so it is possible to browse and view every transaction ever Signatures in Bitcoin. In many ways, this is the traditional cryptography in Bitcoin. We ask the question, “How do we know that Alice was authorized to transfer 100 Bitcoins to Bob,” and anyone who has used public-key cryptography knows the answer is, “Alice signs the transaction with her private key and publishes this signature for the Bitcoin network to verify with her public key.” Cryptography. Cryptography is the branch of mathematics that lets us create mathematical proofs that provide high levels of security. Online commerce and banking already uses cryptography. In the case of Bitcoin, cryptography is used to make it impossible for anybody to spend funds from another user's wallet or to corrupt the block chain. It Bitcoin Transaction Life Cycle. BTC Transaction Formation. On the Bitcoin network, the ECDSA elliptical cryptography standard is used in conjunction with the secp256k1 elliptic curve. The private key is 32 bytes, the public key is 33 bytes, and the signature is approximately 70 bytes.

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What Is Bitcoin?

A look at how a transaction is constructed This video is part of a larger online course, "From Barter to Bitcoin: Society, Technology and the Future of Money" run by Prof. Bill Maurer and Prof ... The mechanics of a bitcoin transaction block chain, which is a construct that is generated by bitcoin miners and functions as a global ledger for recording and validating bitcoins. Please DONATE to my education fund, SUBSCRIBE, and LIKE for more cryptocurrency lecture videos. Bitcoin: 1369eCF1pqBfLjhsdmDFWwbbrTmVENUUyz Litecoin ... A detailed explanation of what makes bitcoin transaction block chains secure. ... Zulfikar Ramzan is a world-leading expert in computer security and cryptography and is currently the Chief ... The Year of Pluto - New Horizons Documentary Brings Humanity Closer to the Edge of the Solar System - Duration: 58:34. NASA Recommended for you

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