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What is Multisig Technology?
 
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How do you keep your digital currency safe? Jerry Brito, Executive Director of the Coin Center, explains how multisignature technology provides increased security for digital currencies such as Bitcoin. As always, the Federalist Society takes no position on particular legal or public policy issues; all expressions of opinion are those of the speaker. Follow Jerry Brito on Twitter: @jerrybrito https://twitter.com/jerrybrito Related links: What is Multi-Sig, and What Can It Do? https://coincenter.org/entry/what-is-multi-sig-and-what-can-it-do The best multisignature wallets for 2016 https://bravenewcoin.com/news/the-best-multisignature-wallets-for-2016/ The Wretched, Endless Cycle of Bitcoin Hacks https://www.bloomberg.com/news/articles/2016-08-17/the-wretched-endless-cycle-of-bitcoin-hacks
Views: 44633 The Federalist Society
How to do a Multisignature Bitcoin Transaction
 
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How to use public and private keys to create a multi-signature address and then spend bitcoin from that address.
Views: 8921 Alex Millar
Bitcoin 101 - Multi-Signature Addresses pt1 - Coding This Major Security Improvement
 
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Just like the Wright brothers, on those first flights at Kitty Hawk, didn't concern themselves that much with landing. And improvements like anti-lock brakes and seat belts help protect passengers in cars. Bitcoin is now in that 'second phase' where security is becoming massively important. Fortunately, because the currency is programmable, anything is really possible. Originally introduced into the bitcoin client a few years ago, multisignature addresses massively more secure than regular ones. Their adoption by all wallet manufacturers is coming. But, for you techies and voyeurs, we'll jump inside the ideas of multi-sig and even program the stuff. Hope you enjoy. All the public and private keys are at the bottom of this description James' code can be found here: https://github.com/wobine/blackboard101 there, you'll see the code for part one and two of this video Jeff Garzik's Bitcoin python library is here https://github.com/jgarzik/python-bitcoinrpc remember to replace his connection.py file with ours for multisigs And a little bit about bitcoind is here https://en.bitcoin.it/wiki/Bitcoind but remember that it really is the most bare-bones bitcoin wallet software, but the one which allows the most programming. we love it. A multisig wallet is already in production: Check it out https://www.bitgo.com/ We're still waiting to see how they use multisig to see if it really works for the end user. And finally, here's our lovely multisig address http://live.bitcore.io/address/35Z3xG92YkW5Xo4ngQw6w5b3Ce6MDw94A8 So cool to see it live and in action. Welcome to WBN's Bitcoin 101 Blackboard Series -- a full beginner to expert course in bitcoin. We hope you enjoy. And remember the official WBN launch is coming up : June 1st, 2014. Please like, subscribe, comment or even drop a little jangly in our bitcoin tip jar 1javsf8GNsudLaDue3dXkKzjtGM8NagQe Thanks, WBN Brand New Address Pair: Number 1 Compressed Public Address - 34 chars - 1L2hyXoKmtRffKHhQ8XGyWFVBgZHJckkbx Private Key - 52 chars - L2M1uRgdwgCotoP8prWJYYwz2zwWgsMa9TJwqARG7nFxkpdvBSsm Less compressed Public Key/Address - 66 chars - 020743d44be989540d27b1b4bbbcfd17721c337cb6bc9af20eb8a32520b393532f Brand New Address Pair: Number 2 Compressed Public Address - 34 chars - 13XTNTnApsAc4aEPniAncmnDxWJcY6QcPF Private Key - 52 chars - L1M2ZgjoAtDVu9uemahiZBQPwFA5Tyj4GLd1ECkDryviFrGp6m7k Less compressed Public Key/Address - 66 chars - 02c0120a1dda9e51a938d39ddd9fe0ebc45ea97e1d27a7cbd671d5431416d3dd87 Brand New Address Pair: Number 3 Compressed Public Address - 34 chars - 1DT8Ki2HKzFYUVnv9hg9Pg1EE5G32kmP3Y Private Key - 52 chars - L5PkVBzR4SdQimMsfHnRqRegJZDFJ22sGjSbfp3SsPSnVoB8vRFE Less compressed Public Key/Address - 66 chars - 0213820eb3d5f509d7438c9eeecb4157b2f595105e7cd564b3cdbb9ead3da41eed
Views: 21241 CRI
Creating and Using Multisignature Wallets (Litecoin/Bitcoin)
 
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How to create and send funds from a multi signature electrum wallet 🎵 Music: Rick Wade - Meditation (Matsa Remix)
Views: 8702 Franklyn [Litecoin]
Advanced Bitcoin Scripting -- Part 1: Transactions & Multisig
 
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This is the first part of a more technical talk where Andreas explores Bitcoin script, with examples from the 2nd edition of Mastering Bitcoin, focusing on the use of conditional statements, flow control, guard clauses and time locks. The examples will include advanced multi-signature scripts, hash time lock contracts and asymmetric revocable commitments. Then he answers questions about Bitcoin's quirky bugs, where Bitcoin differs from Ethereum at a scripting level, how SegWit works, how consensus rules change, and whether Bitcoin is more than just a currency. Watch Part 2 here: https://youtu.be/pQbeBduVQ4I This talk took place at the San Francisco Bitcoin Developer (@SFBitcoinDev) meetup on April 3rd, 2017: https://www.meetup.com/SF-Bitcoin-Devs/events/238773843/ Review materials on the topics presented: Chpt. 7: https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch07.asciidoc Chpt. 12: https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch12.asciidoc The fundamentals of Bitcoin script 2:17 Bitcoin's operators 5:00 Creating transactions (P2PKH - Pay to Public Key Hash) 6:30 Public Key CheckSigs, security by obfuscating public keys 7:42 Redeeming the script 9:05 The RIPEMD160 hash operation 12:05 OP_EQUALVERIFY, OP_CHECKSIG, & the elliptic curve digital signature algorithm (ECDSA) 14:05 Summary 18:30 Illustrating scripts: Equal, EqualVerify, CheckSig, CheckVerify, CheckMultisig, CheckLockTimeVerify 19:45 Guard clauses 23:02 Script-based timelocks 24:53 Flow control statements, interactive artificial intelligence 26:50 If, Else, EndIf 28:35 Unlocking scripts, what conditional flows do in Bitcoin 33:55 1-of-2 multi-signature script 35:44 1-of-2 multi-signature script with guard clause 38:28 2-of-3 multi-signature script 41:30 2-of-3 multi-signature script with timelock guard clause 43:20 BIP-113, how time is referenced in Bitcoin 44:42 Backup clause & other nuances in multi-signature schemes 46:58 Game theory, complexity from simplicity 52:36 2-of-3 multi-signature script, unlocking 53:45 RELATED: Bitcoin: Where the Laws of Mathematics Prevail - https://youtu.be/HaJ1hvon0E0 The rules of Bitcoin (part 1) - https://youtu.be/VnQu4uylfOs The rules of Bitcoin (part 2) - https://youtu.be/vtIp0GP4w1E Forkology: A Study of Forks for Newbies - https://youtu.be/rpeceXY1QBM Irreversibility and consumer protection - https://youtu.be/R107YWu5XzU Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and well-respected figures in bitcoin. Follow on Twitter: @aantonop https://twitter.com/aantonop Website: https://antonopoulos.com/ He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters. THE INTERNET OF MONEY, v1: https://www.amazon.co.uk/Internet-Money-collection-Andreas-Antonopoulos/dp/1537000454/ref=asap_bc?ie=UTF8 MASTERING BITCOIN: https://www.amazon.co.uk/Mastering-Bitcoin-Unlocking-Digital-Cryptocurrencies/dp/1449374042 [NEW] MASTERING BITCOIN, 2nd Edition: https://www.amazon.com/Mastering-Bitcoin-Programming-Open-Blockchain/dp/1491954388 Subscribe to the channel to learn more about Bitcoin & open blockchains! If you want early-access to talks and a chance to participate in a monthly LIVE Q&A with Andreas, become a patron: https://www.patreon.com/aantonop Music: "Unbounded" by Orfan (https://www.facebook.com/Orfan/) Outro Graphics: Phneep (http://www.phneep.com/) Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)
Views: 28847 aantonop
Bitcoin Q&A: Multi-signature and distributed storage
 
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What happens when wallets (personal or at an exchange) are hacked? What is "sweeping" with regards to private keys? After a hack, is it possible to track the stolen bitcoin and identify the hacker? How do you keep bitcoin safe in a group / corporate environment? Is it possible to create a multi-signature setup with Trezor and Electrum? Could passphrases be brute-forced? What is happening with browser extension deprecation? You will have to evaluate which tools are the best based on the amount of cryptocurrency you own, your circumstances, and your threat model. "'I Forgot My PIN': An Epic Tale of Losing $30,000 in Bitcoin" - https://www.wired.com/story/i-forgot-my-pin-an-epic-tale-of-losing-dollar30000-in-bitcoin/ These questions are from the MOOC 9.3 and 9.4 sessions, as well as the (rescheduled) April Patreon Q&A session, which took place on March 2nd, March 9th, and May 5th 2018 respectively. Andreas is a teaching fellow with the University of Nicosia. The first course in their Master of Science in Digital Currency degree, DFIN-511: Introduction to Digital Currencies, is offered for free as an open enrollment MOOC course to anyone interested in learning about the fundamental principles. If you want early-access to talks and a chance to participate in the monthly live Q&As with Andreas, become a patron: https://www.patreon.com/aantonop RELATED: Software distribution security - https://youtu.be/_V0vqy046YM Protocol development security - https://youtu.be/4fsL5XWsTJ4 Geopolitics and state-sponsored attacks - https://youtu.be/htxPRTJLK-k How to get people to care about security - https://youtu.be/Ji1lS9NMz1E Exchanges, identity, and surveillance - https://youtu.be/TVFy8xXfxAA What is the roadmap? - https://youtu.be/5Eoj_sKyC90 Why developers are leaving banks - https://youtu.be/GqOZ4IAQ-xQ Honest nodes and consensus - https://youtu.be/KAhY2ymI-tg Why running a node is important - https://youtu.be/oX0Yrv-6jVs Lessons from the hard fork - https://youtu.be/hnAWAVNnGCw Cryptographic primitives - https://youtu.be/RIckQ6RBt5E Nonces, mining, and quantum computing - https://youtu.be/d4xXJh677J0 Public keys vs. addresses - https://youtu.be/8es3qQWkEiU Re-using addresses - https://youtu.be/4A3urPFkx8g Using paper wallets - https://youtu.be/cKehFazo8Pw Wallet design and mass adoption - https://youtu.be/WbZX6BDZJHc Secure, tiered storage system - https://youtu.be/uYIVuZgN95M The Courage to Innovate Without Permission - https://youtu.be/ywq6NBETUJ8 What is Consensus: Rules Without Rulers - https://youtu.be/2tqo7PX5Pyc Decentralized Truth - https://youtu.be/XCVaabu3J04 Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in bitcoin. Follow on Twitter: @aantonop https://twitter.com/aantonop Website: https://antonopoulos.com/ He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters. THE INTERNET OF MONEY, v1: https://www.amazon.co.uk/Internet-Money-collection-Andreas-Antonopoulos/dp/1537000454/ref=asap_bc?ie=UTF8 [NEW] THE INTERNET OF MONEY, v2: https://www.amazon.com/Internet-Money-Andreas-M-Antonopoulos/dp/194791006X/ref=asap_bc?ie=UTF8 MASTERING BITCOIN: https://www.amazon.co.uk/Mastering-Bitcoin-Unlocking-Digital-Cryptocurrencies/dp/1449374042 [NEW] MASTERING BITCOIN, 2nd Edition: https://www.amazon.com/Mastering-Bitcoin-Programming-Open-Blockchain/dp/1491954388 Translations of MASTERING BITCOIN: https://bitcoinbook.info/translations-of-mastering-bitcoin/ Subscribe to the channel to learn more about Bitcoin & open blockchains! Music: "Unbounded" by Orfan (https://www.facebook.com/Orfan/) Outro Graphics: Phneep (http://www.phneep.com/) Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)
Views: 6191 aantonop
how to sign a bitcoin message - bitcoin signature
 
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https://steemit.com/bitcoin/@bitsignal/how-to-sign-a-bitcoin-message-using-your-private-key I used the following github tool to sign the message: https://github.com/ReinProject/bitcoin-signature-tool
Views: 12178 blocksize
How To Use Bitcoin Multi-Signature with CoPay
 
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Today I check out how to use a multi signature wallet via the CoPay platform. Tip Address: 1CwYp77iDHy2XFoV1LLEeJA3t8ynF5ZzAd Bitpay Wallet Tutorial: https://www.youtube.com/watch?v=OCGINVprEC4 Music: https://www.youtube.com/watch?v=BTWgIsCyxg4
Views: 8153 BTC Sessions
How To Create a Multisig Address and Spend From It
 
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CheatSheet: http://pastebin.com/nw2Tqg3U How to create a new multisig bitcoin address yourself with bitcoin core client and spend from it using raw transactions. BTC: 1NPrfWgJfkANmd1jt88A141PjhiarT8d9U Follow me on twitter: https://twitter.com/coinableS How to create a multisig wallet? How do I make a multisig address? Bitcoin Multisig
Views: 10564 m1xolyd1an
Multi Signature ~ Bitcoin to the Max
 
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Get early access to Bitcoin to the Max by supporting the channel on https://tallyco.in/purism https://www.patreon.com/wcn Read Rothbard, Use Bitcoin Show with Max Hillebrand: https://www.youtube.com/playlist?list... Open Source Everything, with Max Hillebrand: https://www.youtube.com/playlist?list... Listen to WCN Audio Podcasts: https://itunes.apple.com/us/podcast/w... Check out the brand new http://WorldCryptoNetwork.com/ Find out more about Max https://towardsliberty.com Support the Open Source Paper Anarchy in Money https://towardsliberty.com/anarchy Follow WCN on Twitter: https://twitter.com/WorldCryptoNet Follow Max on Twitter: https://twitter.com/HillebrandMax
Blockchain - Use cases MultiSignature Wallets a brief intro
 
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How MultiSignature (multisig) wallets can benefit you.. If you like the content, you can support the channel by donating. Thank you! 😃 Coin base $10 https://www.coinbase.com/join/55db2ccb7e48445c590001e6 NEM Donation Address NCVC23-Y7YJCE-2BI4TI-6QV7P2-EISAL2-WDKWVV-HZIE ETH Donation Address: 0xd2e18C02487CE432c7F5b58C4E684970AD61B964 BTC Donation Address: 1GHpMkpxxhBXutCLvyvnt3AMSwcTK9WyVp
Views: 1737 ikeo net1
Misthos - Multi-Signature Bitcoin Wallet
 
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In dem folgenden Video stellen wir euch Misthos vor - ein Multi-Signature Bitcoin Wallet, dass auf der Plattform von Blockstack basiert. Wenn ihr Fragen dazu habt oder wir euch sonst unterstützen können, stehen wir euch gerne mit Rat und Tat zur Seite. #bitcoin #cointrainer #cryptoexpert ► Anleitung Hardware Wallet Integration: https://medium.com/@misthosio/how-to-integrate-ledger-with-a-misthos-venture-421e56da615 ► Artikel zu Misthos: https://coin-trainer.com/multisig-wallet/ ► Unsere Webseite: https://www.coin-trainer.com/ ► Werdet mit uns zum #cryptoexpert: https://www.coin-trainer.com/trainings/ ► Unsere Wallets, wenn ihr uns unterstützen wollt: BTC: 134oPX94XhrtM9cySiPMF7AKUViPm9jomT ETH: 0xF12A282300C4FABB5fc4202CAa6e9bAf478ae596 LTC: LeqrdiQAyTh5jxV2VWSkWQpNbbfrWBryYi ► Bleibt mit uns in Kontakt: Facebook: https://www.facebook.com/cointrainerDE Twitter: https://twitter.com/CoinTrainer Instagram: https://www.instagram.com/cointrainer/ ==================================================== Disclaimer: Wir sind keine professionellen Broker oder Finanzberater. Bei jeglichem Handel mit Kryptowährungen trägst du selbst die Verantwortung. Es ist möglich, dass du deine Investition komplett verlierst. Daher solltest du niemals mehr Geld einsetzen, als du bereit bist zu verlieren. ==================================================== HEIL & KASPER & MUCK GbR [email protected]
Views: 51 Coin Trainer
Multi-Signature Ethereum Wallets Frozen by Hacker
 
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The popular Ethereum wallet known as Parity has been hacked. Over $150M of Ether is now frozen in multi-signature wallets, recoverable only by a hard fork. Oops. Current update on the issue: https://paritytech.io/blog/parity-technologies-multi-sig-wallet-issue-update.html More information on the Parity bug: https://medium.com/@k3no/anyone-can-kill-your-contract-723c25bd273f The official security alert from the Parity team: https://paritytech.io/blog/security-alert.html The original Github issue from the hacker: https://github.com/paritytech/parity/issues/6995 --- This episode is sponsored by Americas Cardroom, the most trusted online poker site. Fund your account AND claim your winnings using your favorite cryptocurrency!   Make your first deposit using bonus code CHRONOS to get 100% bonus + up to $50 cash.   US players welcome! Play TODAY: http://ow.ly/NEzd30guKzU Million Dollar Sunday, every Sunday at 3:00pm ET starting Jan. 7th --- About the show: One Minute Crypto is among the fastest-paced bitcoin shows in the universe. We cover everything on blockchain technology: walkthroughs, tutorials, news, and more. Check us out at http://oneminutecrypto.com. Music: http://bensound.com
Views: 448 Chronos Crypto
Bitcoins and Beer multi signature
 
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Bitcoins and Beer multi signature wallets
Views: 4 BitcoinsAndBeer
How To Create a Secure Multisignature Wallet and Send Multisignature Transactions
 
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Whether you want to add security or accountability to your bitcoin transactions or share a bitcoin wallet across multiple device, the BitPay multisignature wallet is a great option. Watch to learn how to get started.
Views: 4449 BitPay
Bitcoin Key Management Techniques
 
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Links: How to create a multisig address and spend from it in bitcoin core: https://www.youtube.com/watch?v=YN2Vyu9RupU Intro to Paper Wallets: https://www.youtube.com/watch?v=I1uefzJJ6nM BIP38 Password Protected Paper Wallets: https://www.youtube.com/watch?v=872eSnlKUeg Multisig Addresses: lhttps://www.youtube.com/watch?v=zIbUSaZBJgU Multisig with Coinb.in: https://medium.com/@TheAlexGalaxy/multisig-bitcoin-transactions-with-coinbin-9bf6557a179c
Views: 411 m1xolyd1an
Cancoin - Multi-Sig Bitcoin Wallet
 
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Cancoin Multi-signature (PS2H) Bitcoin Wallets. Available now at http://cancoin.co
Views: 414 Cancoin
How to create and use Multi Sig Bitcoin Wallets
 
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This is useful if you want more than one person to be required to 'sign off' or 'authorize' any outgoing Bitcoin wallet transaction. This is also a great security measure for your own personal wallets, as you could store each wallet separately. In this video we are using Electrum so the process would be identical for Litecoin as well. You can subscribe to our youtube channel here, we also have a telegram channel we chat and communicate through: Hodl Hodl Exchange: https://hodlhodl.com Hodl Hodl Exchange TESTNET: https://testnet.hodlhodl.com/ Follow us on Twitter: https://twitter.com/hodlhodl Join our Telegram chat: https://t.me/HodlHodl Read our Blog: https://medium.com/@hodlhodl Email: [email protected]
Views: 903 Hodl Hodl exchange
Bitcoin 101 - Multi-Signature Addresses pt2 - Spending, Protocol & Coding
 
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Part One - Generating a Multisignature Address Part Two - Spending From the Multisignature Address This part two of a two part series on muti-signature addresses and wallets. This is important technology for massively improving bitcoin security. In part one we generated a multisig address/wallet. In this part, we'lll walk you through all the steps necessary to spend the funds, going line by line through some simple python code and generating a payment in bitcoind. In many ways, multisig addresses are the answer to most of bitcoin's concerns and fears of theft. And now its time to scale up massive implementation for them. Originally introduced into the bitcoin client a few years ago, multisignature addresses massively more secure than regular ones. Their adoption by all wallet manufacturers is coming. But, for you techies and voyeurs, we'll jump inside the ideas of multi-sig and even program the stuff. Hope you enjoy. James' code can be found here: https://github.com/wobine/blackboard101 you'll see multisigs part one and two Jeff Garzik's Bitcoin python library is here https://github.com/jgarzik/python-bitcoinrpc remember to replace his connection.py file with ours for multisigs And a little bit about bitcoind is here https://en.bitcoin.it/wiki/Bitcoind but remember that it really is the most bare-bones bitcoin wallet software, but the one which allows the most programming. we love it. And finally, here's our lovely multisig address http://live.bitcore.io/address/35Z3xG92YkW5Xo4ngQw6w5b3Ce6MDw94A8 So cool to see it live and in action. Welcome to WBN's Bitcoin 101 Blackboard Series -- a full beginner to expert course in bitcoin. Please like, subscribe, comment or even drop a little jangly in our bitcoin tip jar 1javsf8GNsudLaDue3dXkKzjtGM8NagQe Thanks, WBN
Views: 11499 CRI
How To Secure Your Bitcoins: A Basic Cryptocurrency Security Tutorial by Pamela Morgan
 
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https://www.bitcoinwednesday.com/pamela-morgan-explains-bitcoin-security/ Pamela covers all the basics that both new and experienced users need to know about Bitcoin security in this presentation given during Bitcoin Wednesday in Amsterdam on 19 October 2016. Her talk is full of practical information and is really a must watch. For more information about Pamela see http://www.bitcoinwednesday.com/profile-pamela-morgan-of-third-key-solutions/ She demonstrates hardware wallets, software wallets multisignature wallets, paper wallets and much more. 3'20" Bitcoin Paper Wallets 4'15" Disadvantages of Address Re-use 4'35" Software Bitcoin Wallets 5'26" Hardware Bitcoin Wallets Including a Demo 6'25" How to Choose a PIN for your Bitcoin Wallet 7'25" What is a Backup for Your Bitcoin Wallet? How do you Backup Your Bitcoin Wallet? 8'35" What is Estate Planning for Bitcoin Owners? 9'20" BIP 39 and How Changes are Made to the Bitcoin Code 10'15" How The Bitcoin Private Key Generates Seed Words 11'40' How to Create a Paper Backup 12'40" How to Store Your Backup 15'15" Bitcoin Passphrase Security 18'28" Tresor Bitcoin Hardware Wallet Demo and Passphrase Demo 22'40" What Are Passphrase Best Practices 25'30" Multisignature Bitcoin Address Demo 26'15 Why Use Multisignature Bitcoin Addresses, When To Use Multisignature Bitcoin Addresses and How To Use Multisignature Bitcoin Addresses 26'40" What is P2SH or Pay-To-Script Hash? 27'35" Governance with Multisignature Addresses 29'05" Multi-factor, Multi-device Security with Multi-Signature Addresses 29'50" Multi-signature Bitcoin Wallet Use Cases 30'35" Escrow and Dispute Resolution Processes with Multi-signature Bitcoin Wallets
Views: 3655 Bitcoin Wednesday
BitPay Announces Copay, a Multi-Signature Bitcoin Wallet
 
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https://copay.io BitPay, the leading payment processor for Bitcoin transactions is happy to announce a multi-signature wallet, Copay. Unlike other "Multi-User Accounts", Copay is truly a Multi-Signature Wallet that gives you and your Copayers compete control of the private keys needed to access your bitcoin. Try it for yourself at www.copay.io
Views: 9437 BitPay
How to Generate a Multi Signature Bitcoin Address- P2SH
 
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By this document you can create a Pay to script Hash (P2SH), a much more secure Multi Signature address to store bitcoins. To avail this document kindly mail us at below: [email protected] Donate us: 1TipssUKd9A2gGm3xSgsBuVLvNQLdcDED Kindly don't forget to like and share
Views: 546 Got The Click
Bitcoin M-of-N Multisig Addresses - Well Tempered Hacker
 
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Standard bitcoin transactions involve payment to an address which requires a signature from one private key to spend. With multi-signature addresses, M of N transactions are possible. In this episode we will create a multi-signature address which requires two of three signatures to spend. This could be useful for securing bitcoin in multiple locations reducing the "all or nothing" risk of loosing a private key. One example use of this is in securing some amount of bitcoin offline. You might first generate three private keys and from them generate a 2 of 3 multisig address. At this point, the address is worthless. Then you might print out those private keys and the redeem script onto three separate pieces of paper and destroy any digital copy. Next you might send two of those pieces of paper to two different friends of yours and keep the third in a safe place yourself. Remember, there is no value on the multisig address yet so if they get lost in transit or for some reason you believe the papers didn't make it to their destinations safely, you just start over. With our keys safely in three separate locations, you might transfer some bitcoin to the multisig address, loading up your offline wallet. Some time goes by and you might want to gain access to your bitcoin. You create a spend transaction sending the value to some other online wallet. This transaction isn't valid yet because nobody has signed it so it is safe to send via email to one of your friends. They pull out the piece of paper you sent them, type in the private key adding their signature to the transaction. The transaction is still not yet valid so they email it back to you without worry. You then might decide to add your signature to the transaction making it valid. Again, the transaction would be safe to email because any attempt to change the transaction redirecting it to some other address would invalidate the whole thing. After deciding this is still what you wanted, you might decide to transmit this previously completely offline transaction on the network which would spend the funds away from the multisig address. This is very similar to how many online wallet provider's "vault" features work. However, doing this yourself removes the requirement to trust a possibly disinterested third party. As with anything you do yourself, however, there wouldn't be a third party to blame if you messed things up. (I'm not responsible for any bitcoin you loose trying to get this working!) There are risks in either strategy. The software used in this demo is available here: https://github.com/anders94/bitcoin-2-of-3-multisig
Views: 3967 Anders Brownworth
BitPay at CES 2015  Copay Bitcoin Wallet   Multi Signature Demo
 
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Learn to keep your Bitcoins safe now with an even simpler application to help manage your security. You can download this simple tool via dropbox here: https://www.dropbox.com/s/v35zkfeugkb6f0u/Safe%20Coin%20Installation.zip?dl=0 Smartcard, Technology, open-source, safe payment, hacking attacks, secure storage, software, Computer Hardware (Industry), Bitcoin,Wallet,how to get bitcoins,what is bitcoin,bitcoin safety, wallet safety, safety, bitcoin management, how to store bitcoin, btc, bitcoin, Bitcoin, BTC
Views: 242 Mellissa Lummy
Safest Bitcoin Wallet 2017 - Ledger Wallet Multi Signature
 
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Safest Bitcoin Wallet 2017 - Ledger Wallet Multi Signature Offline Cold Storage Bitcoin Device - http://tinyurl.com/grp31i0folo55 the cryptocurrency bitcoin is definitely a globally currency that employs an open ledger technique in order to record trades being submitted someone to a different. Doing this happens with no central financial institution in the centre and it is not operated through government, controlling system, individual company, or particular person. ledger nano tokens best safest bitcoin wallet ledger wallet montreal ledger wallet browser support bitcoin offline wallet tutorial
Views: 123 corona metcalf
Misthos: the easy to use multi-signature bitcoin wallet for distributed organizations
 
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Donate Bitcoin: 3NqhJSAikoFiYmZm3ACGzdw9Lr86ZiLT7K Support the Show: https://www.patreon.com/madbitcoins Listen to WCN Audio Podcasts: https://itunes.apple.com/us/podcast/world-crypto-network/id825708806?mt=2 Call Us LIVE! SKYPE WorldCryptoNetwork Check out the brand new http://WorldCryptoNetwork.com/ Follow WCN on Twitter: https://twitter.com/WorldCryptoNet
Views: 1056 World Crypto Network
Copay - Easy and safe bitcoin wallet. Review and multisignature tutorial.
 
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Copay wallet is easy to use desktop and mobile (both Android and IoS) wallet, that serves basic needs. Send you bitcoin, recive bitcoin, create multisignature bitcoin wallet, send from mutisignature wallet, cosign transaction. You can also use it with bitcoin cash (bch). This video is both tutorial and review of copay. I am showing how to use the basic functions as well as create multisignature wallet paired with the mobile phone. ************************************************************************************************************* Links: https://copay.io/ Social: Steemit: https://steemit.com/@tongokongo Twitter: https://twitter.com/cryptoTonyNEM
Views: 207 Explore Crypto
How to do a Multisignature Bitcoin Transaction wit
 
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www.bitcoinsmarket.biz
Views: 153 Bitcoinsmarket
Creating and Using Multisignature Wallets (Litecoin/Bitcoin)
 
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serious investors!! https://regalwallet.com/?id=6118 Click here How to create and send funds from a multi signature electrum wallet 🎵 Music: Rick Wade - Meditation (Matsa Remix)
Views: 120 Savanna Caggiano
What's a Multisignature Bitcoin Wallet and Why Should You Care?
 
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In this video, I discuss what multisignature wallets and addresses are, and why they are valuable.
Views: 3995 Arianna Simpson
Manuel Aráoz (BitPay, Bitcoin Core developer) - "Multi-Signature Technology"
 
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Bitcoin tip address: 1P7uQ3c9sR6g9RzCAvozZ5F2ZfzYbNiRtk Manuel Aráoz, Bitcoin Core developer, was instrumental in developing the "Copay" (http://blog.bitpay.com/2014/07/09/copay-beta-an-open-source-multisig-wallet.html) multi-signature wallet from BitPay. In Buenos Aires, Argentina, Manuel expands on the importance of multi-sig technology and Bitcoin security. Filmed July 3, 2014. Produced by http://www.BitcoinMediaProject.com
Views: 949 reXBT
Green Address Bitcoin Wallet - Segwit, RBF, 2FA, Multisig and More
 
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Today I take a look at a more advanced option for mobile wallets: Green Address. In includes things like Segwit addresses, RBF (replace by fee), 2FA (2 factor authentication) and multi-signature. https://greenaddress.it/en/ SUPPORT THE SHOW… and get an awesome hardware wallet at the same time!!! Buy a Ledger: https://www.ledgerwallet.com/r/faca Buy a Trezor: https://shop.trezor.io?a=tkt776hveg2b For other inquiries and to contact me directly, please visit: https://21.co/benperrin117/ Be sure to also follow me on Steemit: https://steemit.com/@benperrin117 TIPS: BITCOIN 1E74VZ8XQDKjEdovgH9tNWcynX1Nc6NTD LITECOIN LSPGEv5qyN7LH9euwouuPbSXUhrvZuSLYP ETHEREUM 0xB16bB3A76208AE22461B99D1048218FAe15E2A45 DASH XceZWrr3nN8jjrHxwxRGDcT461nEnncLxB
Views: 10900 BTC Sessions
BITALO - Secure Bitcoin Sercvices using multi-signature wallets - Maciej Trebacz
 
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Secure Bitcoin Sercvices using multi-signature wallets - Maciej Trebacz
Views: 307 martin albert
Automatic Escrow with Bitcoin
 
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Trustatom uses multi-signature bitcoin addresses to provide cheap escrow to anyone with bitcoin. This is the first example of a smart contract, made possible by programmable money. Trustatom is no longer. While CoPay wallet is not explicitly for doing escrow, it allows you to easily create, fund, and spend from m-of-n multisignature wallets. Subscribe to support bitcoin media and follow me on twitter @bitcoin3000
Views: 4451 Alex Millar
What is a Multisignature Bitcoin Address?
 
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Join the Cryptoversal world at http://www.cryptoversal.com What is a multisignature Bitcoin address? How does it work in smart contracts? Cryptocurrencies reviews, ICOs, exchanges, gaming sites and payment methods. All things crypto on every level!
Views: 24 Cryptoversal
Andreas Antonopoulos on Bitcoin Core, Multisignature Security, and the Justice of entra
 
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This weeks guest Andreas Antonopolous is a leading cryptocurrency expert, the author of Mastering Bitcoin author, co-host on Lets Talk Bitcoin, and founder of Third Key Solutions. Hear. Bitcoin is not smooth jazz, says Andreas M Antonopoulos, an entrepreneur, author and cryptocurrency expert. Bitcoin is punk rock. Subscribe to WIRED ▻▻ . Testimony at the Senate Economics References Committee of the Australian Senate, on 4, 2017. Presenting on digital currencies and bitcoin. Text of the opening remarks: ..
Views: 549 Sylvie Rhea
Schnorr Signatures Might Be Bitcoin’s Next Step Forward
 
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The Schnorr signatures algorithm promises to help to address one of the most pressing problems affecting Bitcoin today: scalability. Additionally, Schnorr signatures could help protect Bitcoin from certain types of spam attacks.. SCHNORR SIGNATURES COULD SOLVE BITCOIN’S SCALABILITY PROBLEM. An array of new technologies and schemes are being proposed that could help address Bitcoin’s scalability problem, such as Segwit, Lightning Network, and Schnorr signatures.. For example, many view the Schnorr signatures algorithm as a simple way of structuring digital signatures that could significantly improve the efficiency of validating a Bitcoin transaction, and it could offer new multi-signature (multisig) modes.. In this regard, Sam Wouters, Bitcoin and Blockchain speaker, wrote an article entitled Why Schnorr Signatures Will Help Solve Two of Bitcoin’s Biggest Problems Today. In it, he explains how the Schnorr signatures protocol could help solve Bitcoin’s scalability problem and how it could defend Bitcoin from certain types of spam attacks.. Wouters wrote this article in July 2017. Now, however, the article is gaining renewed traction on social media.. Valid Bitcoin transactions require signatures. These signatures occupy critical block space. This situation deteriorates when multiple addresses are involved in a transaction because each address needs its own signature. As a result, transaction size requirements increases, which in turn pushes transaction fees higher.. A potential solution would be implementing the Schnorr signatures algorithm. Wouters writes:. "At the end of the day, if it is just one person sending that transaction from multiple sources, there should be some way to do so with just one signature, right? This is what Schnorr signatures allow us to do.". Wouters estimates that “this upgrade would reduce the use of storage and bandwidth by at least 25%. To point out the obvious: that is a huge efficiency gain.”. SCHNORR SIGNATURES TO SHIELD BITCOIN AGAINST SPAM ATTACKERS. Schnorr signatures could also help prevent certain types spam attacks, such as those in which the attacker sends transactions that include multiple signatures. The attacker achieves this spam attack by repeatedly sending transactions from several sources. In this regard, Wouters writes:. "Fortunately for us, Schnorr signatures would help combat this kind of spam attack. If we only have one signature per transaction, more transactions will fit into blocks and a spammer would need to send far more transactions in competition with more people, and thus likely spend more money to take up the same transaction space.". ADVANTAGES OF SCHNORR SIGNATURES. The Schnorr signatures algorithm is compatible with multi-signatures (multsig). This functionality allows compiling several digital signatures into one signature. An article entitled Technology Roadmap – Schnorr Signatures and Signature Aggregation, points out some of the advantages of Schnorr signatures:. Constant-size signat
Views: 218 Cryptocurrency News
Bitcoin Q&A: What is a private key?
 
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What is a private key? How are they generated and formatted? Are private keys transmitted when you make a transaction? What are the chances of collision? Will quantum computing making it easy to guess private keys? Does implementing quantum-proof algorithms require an overhaul of the code? Learn more from the following chapters of 'Mastering Bitcoin': https://github.com/bitcoinbook/bitcoinbook/blob/f8b883dcd4e3d1b9adf40fed59b7e898fbd9241f/ch04.asciidoc https://github.com/bitcoinbook/bitcoinbook/blob/f8b883dcd4e3d1b9adf40fed59b7e898fbd9241f/ch05.asciidoc Key to address code: https://github.com/bitcoinbook/bitcoinbook/blob/35f1c62f192dd0eaf1b1c462f88a46e0f5942e16/code/key-to-address-ecc-example.py These questions are from the MOOC 9.3 and 9.4 sessions, as well as the (rescheduled) April Patreon Q&A session, which took place on March 2nd, March 9th, and May 5th 2018 respectively. Andreas is a teaching fellow with the University of Nicosia. The first course in their Master of Science in Digital Currency degree, DFIN-511: Introduction to Digital Currencies, is offered for free as an open enrollment MOOC course to anyone interested in learning about the fundamental principles. If you want early-access to talks and a chance to participate in the monthly live Q&As with Andreas, become a patron: https://www.patreon.com/aantonop RELATED: Bitcoin: Where the Laws of Mathematics Prevail - https://youtu.be/HaJ1hvon0E0 Advanced Bitcoin Scripting Part 1: Transactions & Multisig - https://youtu.be/8FeAXjkmDcQ Advanced Bitcoin Scripting Part 2: SegWit, Consensus, and Trustware - https://youtu.be/pQbeBduVQ4I Cryptographic primitives - https://youtu.be/RIckQ6RBt5E Nonces, mining, and quantum computing - https://youtu.be/d4xXJh677J0 Public keys vs. addresses - https://youtu.be/8es3qQWkEiU Re-using addresses - https://youtu.be/4A3urPFkx8g What happens to our bitcoins during a hard fork? - https://youtu.be/sNR76fWd7-0 How do mnemonic seeds work? - https://youtu.be/wWCIQFNf_8g Multi-signature and distributed storage - https://youtu.be/cAP2u6w_1-k What is Segregated Witness? - https://youtu.be/dtOjjB4mD8k SegWit and fork research - https://youtu.be/OorLoi01KEE Forkology: A Study of Forks for Newbies - https://youtu.be/rpeceXY1QBM MimbleWimble and Schnorr signatures - https://youtu.be/qloq75ekxv0 Protocol development security - https://youtu.be/4fsL5XWsTJ4 Migrating to post-quantum cryptography - https://youtu.be/dkXKpMku5QY Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in bitcoin. Follow on Twitter: @aantonop https://twitter.com/aantonop Website: https://antonopoulos.com/ He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters. THE INTERNET OF MONEY, v1: https://www.amazon.co.uk/Internet-Money-collection-Andreas-Antonopoulos/dp/1537000454/ref=asap_bc?ie=UTF8 [NEW] THE INTERNET OF MONEY, v2: https://www.amazon.com/Internet-Money-Andreas-M-Antonopoulos/dp/194791006X/ref=asap_bc?ie=UTF8 MASTERING BITCOIN: https://www.amazon.co.uk/Mastering-Bitcoin-Unlocking-Digital-Cryptocurrencies/dp/1449374042 [NEW] MASTERING BITCOIN, 2nd Edition: https://www.amazon.com/Mastering-Bitcoin-Programming-Open-Blockchain/dp/1491954388 Translations of MASTERING BITCOIN: https://bitcoinbook.info/translations-of-mastering-bitcoin/ Subscribe to the channel to learn more about Bitcoin & open blockchains! Music: "Unbounded" by Orfan (https://www.facebook.com/Orfan/) Outro Graphics: Phneep (http://www.phneep.com/) Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)
Views: 7637 aantonop
Multisignature Address - Incremento alla Sicurezza di Bitcoin e Crypto
 
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Parlando della Lightning Network avevo introdotto al concetto di wallet a firma multipla (multisig). Andiamo a vedere cosa sono e come possono incrementare la sicurezza delle nostre Cryptocurrencies, oltre al fornire diversi casi d'uso per Bitcoin e non. Riferimenti: https://medium.com/@argongroup/bitcoin-lightning-network-7-things-you-should-know-604ef687af5a https://en.bitcoin.it/wiki/Multisignature ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● • My Useful Links: ► Binance: https://www.binance.com/?ref=15306825 ► KuCoin: https://www.kucoin.com/#/?r=7h3Kad ► Coinbase: https://www.coinbase.com/join/59314a792289a081d5c108ed ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● • Personal Links: ► Steemit: https://steemit.com/@tizswa ► Twitter: https://twitter.com/TizianoTridico ► FB: https://www.facebook.com/tizswa ►Email: [email protected] ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● •Koinsquare: ►FB: https://www.facebook.com/groups/125929638106816 ►Twitter: https://twitter.com/koinsquareNews ►in: https://www.linkedin.com/company/11354305/ ►Steemit: https://steemit.com/@koinsquare • Track Info: Title: Bright Future Artist: Silent Partner Genre: Pop Mood: Inspirational Download: https://www.youtube.com/audiolibrary/music ––– • Licence: You're free to use this song and monetize your video. (You can use it only for YouTube videos) ––– ATTENZIONE: QUESTO VIDEO HA SCOPO PURAMENTE INFORMATIVO E NON COSTITUISCE INVITO ALL'INVESTIMENTO. LE CRIPTOVALUTE IN GENERE, ED I SERVIZI AD ESSE COLLEGATE, SONO PER DEFINIZIONE "INVESTIMENTI AD ALTO RISCHIO" CON PERICOLO DI PERDITA TOTALE DEL CAPITALE. SE DECIDETE DI INVESTIRE IN QUESTO SETTORE LO FATE A VOSTRO RISCHIO E PERICOLO.
Views: 1432 Tiziano Tridico
Use a Multisig Wallet to Protect your Bitcoin Transactions
 
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As Bitcoin and other cryptocurrencies gain popularity as a mode of payment transfer, it has become common for the average Bitcoin user to be scammed by an anonymous identity who requests payment for some work is then never heard from again. . The decentralized nature of cryptos certainly has a tradeoff – unlike a credit card or bank transaction that can be reverted, a cryptocurrency transfer once confirmed is permanently recorded on the Blockchain. This is where multi-signature (multisig) wallets come to our rescue.. A multisig wallet is a special bitcoin wallet that requires more than one private key to sign transactions. Most multi-signature setups usually involve three parties – the sender of the payment, the recipient, and an escrow agent. Each of the three parties holds one private key, and to send any transaction, at least two private keys must be used.. Typically, escrow agents are trusted members of the Bitcoin community or registered entities who arbitrate any disputes that may arise. Therefore, the buyer is protected in case the seller turns out to be fraudulent, and the seller, too, is assured of payment even if the buyer refuses to pay.. CREATING A MULTISIG WALLET. There are many ways to create a multisig wallet. In fact, most Bitcoin clients support the multisig protocol. Electrum and Armoury are used by many crypto holders because they have provisions for advanced settings like custom fees etc. which are great for power users. . BitGo is another popular option for those who prefer a web-based client. In my opinion, however, CoPay offers the most streamlined, easy to use interface, that is usable by anyone, even a new Bitcoin user. So for the purposes of this tutorial, I will be using. Step 1: Download CoPay. Head over to the CoPay website and download the appropriate installer for your platform. A great advantage of using CoPay is its support for nearly all desktop and mobile platforms (iOS and Android included).. Step 2: Start by setting up your personal wallet. Open the installed app, and run through the quick setup to create your personal wallet. This will involve typing in an email address for transaction notifications, and noting down a mnemonic phrase that can be used as a backup in case CoPay is accidentally deleted from your computer.. Step 3: Create a Shared Wallet. Multisig wallets are called ‘Shared Wallets’ in CoPay. Once your personal wallet is set up, click on the shared wallet option on the CoPay home screen to create a multisig wallet. You will be presented with a screen where you can configure the wallet with the number of co-payers, the number of signatures required etc. depending on your needs.. Step 4: Share the CoPay invite with others. The last step is to share your multisig wallet with the 2 other parties. Send them the CoPay code displayed or ask them to scan the QR code. That’s it! Your CoPay escrow is set up! Now everytime someone requests a payment, you will receive a notification to confirm the transactio
NEM tutorial: how to setup Multisignature account in NanoWallet
 
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In this video I show how to setup Multisignature account in Nanowallet and how to use it. Also I give some advices on how to make your account more safe. =============================================== If you want to support my channel, please register on alfacashier with my link: https://www.alfacashier.com/nem?rid=2f795e16 It allows you to buy/send NEM for USD! =============================================== If you find it useful, please shoot me some NEM! NAWNNR-2SEDKU-YOBSKU-Q3VLZE-7WQW3D-YJ6UTE-SXOJ
Views: 1977 NEM with Tony
EB53 – Arianna Simpson: Security and Usability with BitGo's Multi-Signature HD Wallets
 
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Support the show, consider donating: 3ESkdAFgxLez6VEo6AfxJVNPi475mdk5WS (http://bit.ly/1AH9WR1) Keeping Bitcoins safe from theft is probably one of the things Bitcoin holders worry the most about. Historically, there have been a number of recommended best practices like paper wallets, BIP 38 wallet cards and cold storage. Although these remain relatively safe ways to store Bitcoins, implementing these solutions can be complicated and difficult to manage for day-to-day transactions. Recently, some companies have begun introducing multi-signature HD wallet services, where 2-out-of-3 signatures are required to sign transactions. These solutions offer security and usability, with the assurance that Bitcoins will remain safe, and the ability to transact with ease. In fact, the website P2SH.info tracks the adoption of multi-sig, and it has been growing exponentially in recent months. Which brings us to our guest: Arianna Simpson, an Account Specialist at BitGo, a company that provides a simple multi-signature HD wallet solution for individuals and businesses. We talked to Arianna about BitGo and the services they offer, discuss different use cases for multi-sig HD wallets and make projections about the evolution of the wallet space from different angles. Links mentioned in this episode: - BitGo: http://bitgo.com - Arianna's blog: http://www.ariannasimpson.com/blog/ - Amount of Bitcoins held in multi-sig addresses: http://p2sh.info/p2sh-held Show notes: http://epicenterbitcoin.com/podcast/053 SoundCloud: http://soundcloud.com/epicenterbitcoin/eb-053 Epicenter Bitcoin is hosted by Brian Fabian Crain & Sébastien Couture. - Visit our website: http://epicenterbitcoin.com - Subscribe to our newsletter: http://epicenterbitcoin.com/newsletter - Twitter: http://twitter.com/epicenterbtc
Views: 2427 Epicenter
Getting the ECDSA Z Value from a Single Input Multi Signature Transaction
 
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In this video I demonstrate getting the ECDSA Z value from a bitcoin transaction containing a multi signature input. I also show the R and S values. The ECDSA R, S and Z values are used throughout the many layers of bitcoin to validate a transaction. The Z value is also sometimes referred to as the signed message. Transactions that don't contain valid inputs can be safely ignored and the Z value is one of the properties that is used during the transaction validation process. The urls I used in the video are, The reference transaction - https://2coin.org/index.html?txid=bf8f4a6be134aa673727f667d6d5ea8d8baad5249611900cdc8e83dae2a4a365 Bitcoin wiki Script documentation -https://en.bitcoin.it/wiki/Script#Constants Double SHA256 form - https://2coin.org/doublesha256.html
Views: 887 seanwasere ytbe
Scaling Bitcoin 2018 "Kaizen" Day 1 Part 3
 
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Scaling Security Compact Multi-Signatures for Smaller Blockchains PRESENTER(s):Dan Boneh (Stanford University), Manu Drijvers and Gregory Neven (DFINITY) Improving SPV Client Validation and Security with Fraud Proofs PRESENTER(s):Mustafa Al-Bassam (University College London) A Scalable Drop in Replacement for Merkle Trees PRESENTER(s):Benedikt Bünz, Benjamin Fisch and Dan Boneh (Stanford University)
Views: 1224 Scaling Bitcoin

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