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Consensus Algorithms, Blockchain Technology and Bitcoin UCL - by Andreas M. Antonopoulos
 
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An academic lecture by Andreas M. Antonopoulos explaining the consensus algorithm, "Proof of Work", used by bitcoin and many other blockchains. This talk was presented in collaboration with the Department of Computer Science, at University College London. Andreas is a UCL alum. Subscribe to the channel to learn more about Bitcoin & open blockchains; click on the red bell to enable notifications about new videos! MASTERING BITCOIN, 2nd Edition: https://amzn.to/2xcdsY9 Translations of MASTERING BITCOIN: https://bitcoinbook.info/translations-of-mastering-bitcoin/ THE INTERNET OF MONEY, v1: https://amzn.to/2ykmXFs THE INTERNET OF MONEY, v2: https://amzn.to/2IIG5BJ Translations of THE INTERNET OF MONEY: Spanish, 'Internet del Dinero' (v1) - https://amzn.to/2yoaTTq French, 'L'internet de l'argent' (v1) - https://www.amazon.fr/Linternet-largent-Andreas-M-Antonopoulos/dp/2856083390 Russian, 'Интернет денег' (v1) - https://www.olbuss.ru/catalog/ekonomika-i-biznes/korporativnye-finansy-bankovskoe-delo/internet-deneg Vietnamese, 'Internet Của Tiền Tệ' (v1) - https://alphabooks.vn/khi-tien-len-mang MASTERING ETHEREUM (Q4): https://amzn.to/2xdxmlK
Views: 109136 aantonop
Bitcoin Q&A: The value of proof-of-work
 
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Can a blockchain exist without miners, proof-of-work, or blocks? What are the implications for security, trustlessness, and decentralisation? Not all distributed ledgers are blockchains. What is the influence of alternative energy generation on mining in proof-of-work cryptocurrencies? Should we use alternative algorithms that generate "useful work" in addition to mining cryptocurrencies? The hard promises that Bitcoin provides are valuable and useful in themselves. What is the difference between proof-of-work and proof-of-stake? Note: These sessions were recorded live using Google Hangouts. The audio and video may be slightly out of sync at some points. These questions are from the MOOC sessions 7.2 and 8.2, covering the Byzantine Generals' Problem, which took place on February 26th 2017 and September 15th 2017 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: Immutability and Proof-of-Work: The Planetary Scale Digital Monument - https://youtu.be/rsLrJp6cLf4 Consensus Algorithms, Blockchain Technology, and Bitcoin - https://youtu.be/fw3WkySh_Ho Advanced Bitcoin Scripting Part 1: Transactions and Multisig - https://youtu.be/8FeAXjkmDcQ Advanced Bitcoin Scripting Part 2: SegWit, Consensus, and Trustware - https://youtu.be/pQbeBduVQ4I What is Consensus: Rules without Rulers - https://youtu.be/2tqo7PX5Pyc Forkology: A Study of Forks for Newbies - https://youtu.be/rpeceXY1QBM 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 Decentralized power, leaderless governance - https://youtu.be/E5VbDlQTPzU Proof-of-Work (PoW), Proof-of-Stake (PoS), Delegated Proof-of-Stake (DPoS) - https://youtu.be/3W_3AQrQEOM Does the Lightning Network have proof-of-stake elements? - https://youtu.be/GOYP4O4yetQ Directed acyclic graphs (DAGs) and IOTA - https://youtu.be/lfgMnbb5JeM Intrinsic vs. extrinsic assets - https://youtu.be/KDtfFNZy9xg Scaling, trust, and trade-offs - https://youtu.be/vCxmHwqyJWU Why running a node is important - https://youtu.be/oX0Yrv-6jVs Running nodes and payment channels - https://youtu.be/ndcfBfE_yoY What happens during a fork? - https://youtu.be/XBk8hBJ1xVo SegWit adoption - https://youtu.be/KCsTVTRk6I4 Energy consumption - https://youtu.be/2T0OUIW89II Solar energy and mining in space - https://youtu.be/cusakcpa8AM 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 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: 15505 aantonop
IOHK | Consensus protocols - proof of stake and proof of work
 
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Charles Hoskinson is a Colorado based technology entrepreneur and mathematician. He attended Metropolitan State University of Denver and University of Colorado at Boulder to study Analytic Number Theory prior to moving into cryptography via industry exposure. His professional experience includes founding three Cryptocurrency related start-ups - Invictus Innovations, Ethereum and IOHK - and a variety of colorful positions in the public and private sector. He was the founding chairman of the Bitcoin Foundation’s education committee and established the Cryptocurrency Research Group in September of 2013. His current projects focus on education of cryptocurrency topics, evangelism of decentralization and making cryptographic tools easier to use for the mainstream. https://iohk.io/team/charles-hoskinson/ Developing a secure proof of stake algorithm is one of the big challenges in cryptocurrency, and a proposed solution to this problem won the attention of the academic community. Several hundred cryptographers from around the world arrived at the University of California Santa Barbara on Sunday for the flagship annual event of their field, Crypto 2017. Over several days, they present cutting edge research for the scrutiny of their peers, while in the evenings they continue discussions with friends and colleagues over dinner on the university campus, with the inspiring backdrop of the Santa Ynez mountains meeting the Pacific ocean behind them. https://iohk.io/press/ Ouroboros, developed by a team led by IOHK chief scientist Aggelos Kiayias, made it through a tough admission process for the prestigious conference. This year, 311 papers were submitted and of those 72 were accepted. Only three papers at the conference were on the subject of blockchain. All three papers were supported by IOHK funding. Speaking after his presentation, Professor Kiayias said: “We’re very happy that we had the opportunity to present Ouroboros at the conference. The protocol and especially its security analysis were very well received by fellow cryptographers.” “Our next steps will be to focus on the next version of the protocol, Ouroboros Praos which improves even further the security and performance characteristics of the protocol.” The Ouroboros protocol stands out as the first proof of stake algorithm that is provably secure, meaning that it offers security guarantees that are mathematically proven. This is essential for a protocol that is intended to be used in cryptocurrency, an infrastructure that must be relied on to carry billions of dollars worth of value. In addition to security, if blockchains are going to become infrastructure for new financial systems they must be able to comfortably handle millions of users. The key to scaling up is proof of stake, a far more energy efficient and cost effective algorithm, and as such this research represents a significant step forward in cryptography. Ouroboros also has the distinction of being implemented – the protocol will be an integral part of Cardano, a blockchain system currently in development. https://iohk.io/research/papers/#XJ6MHFXX https://iohk.io/projects/cardano/ There were two other papers presented at the bitcoin session on Monday. The Bitcoin Backbone Protocol with Chains of Variable Difficulty, was produced by a team of three researchers and included Prof Kiayias. It is a continuation of previous research into Bitcoin, which was itself the first work to prove security properties of its blockchain. A third paper on the subject of bitcoin was presented, Bitcoin as a Transaction Ledger: A Composable Treatment. Other notable talks at the conference included a presentation by John Martinis, an expert on quantum computing and former physics professor at the University of California Santa Barbara, who is now working at Google to build a quantum computer. Leading cryptographers at the conference included Whitfield Diffie, pioneer of the public key cryptography that made Bitcoin possible, and Ron Rivest, Adi Shamir, and Leonard Adleman, who came up with the RSA public-key cryptosystem that is widely used for secure data transmission. https://www.forbes.com/sites/amycastor/2017/08/23/at-crypto-2017-blockchain-presentations-focus-on-proofs-not-concepts/#6e558d1a7b70 https://iohk.io/team/aggelos-kiayias/ https://iohk.io/team/bernardo-david/ https://iohk.io/team/peter-gazi/ -- Input Output See more at: https://iohk.io Get our latest news updates: https://iohk.io/blog/ Meet the team: https://iohk.io/team/ Learn about our projects: https://iohk.io/projects/cardano/ Read our papers: http://iohk.link/paper-ouroboros Visit our library: https://iohk.io/research/library/ In the press: https://iohk.io/press/ Work with us: https://iohk.io/careers/ See more on Cardano: https://iohk.io/projects/cardano/ --
Views: 2575 IOHK
Vitalik Buterin: Proof of Stake vs Proof of Work (Blockchain Insider)
 
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Subscribe to the podcast: http://bit.ly/subbchaininsider For the Blockchain Insider podcast, Simon Taylor and Colin Platt sat down with Vitalik Buterin to talk through Ethereum, the plans for the blockchain, and his 2019 predictions for the space! Vitalik explains the difference between Proof of Stake and Proof of Work ahead of the Casper launch. What makes Proof of Stake superior for Ethereum? Stay tuned for the full interview with Vitalik, out Thursday 13th of December! ******* Stay in touch! Twitter: @bchaininsiders 11:FS: @11fsteam ****
Views: 3630 11FS
Bitcoin Whiteboard: Bitcoin Consensus Algorithms - Andreas M. Antonopoulos
 
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This is part of a presentation in collaboration with the Department of Computer Science, at University College London (UCL). Andreas is a UCL alumni. Part of an academic lecture that Andreas M. Antonopoulos gave at the beginning of 2016 explaining the consensus algorithm, "Proof of Work", used by bitcoin and many other blockchains. Watch the full presentation here https://youtu.be/fw3WkySh_Ho Andreas 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. Get the books on Amazon http://amzn.to/2zpekI0 Follow Andreas on Twitter @aantonop https://twitter.com/aantonop Subscribe to Andreas's YouTube channel https://www.youtube.com/user/aantonop Check out Andreas's website https://antonopoulos.com/ Support Andreas by becoming a Patreon https://www.patreon.com/aantonop This is part of a video that was first published under a creative commons licence https://creativecommons.org/ on 31 Jan 2016 the aantonop YouTube channel https://www.youtube.com/user/aantonop and can be found here https://youtu.be/fw3WkySh_Ho About the Creative Commons Licence: One goal of Creative Commons is to increase the amount of openly licensed creativity in “the commons” — the body of work freely available for legal use, sharing, repurposing, and remixing. Follow Bitcoinboy on Twitter @BitCoinBoy https://twitter.com/BitCoinBoy If you'd like to support this channel 1BtCboyxPL4WNutwq79oqsQ5Vc25SchoZp
Views: 2973 Bitcoinboy
Immutability and Proof-of-Work - the planetary scale digital monument
 
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This talk took place on September 13th 2016 at the Silicon Valley Bitcoin Meetup in Sunnyvale, California: https://www.meetup.com/Silicon-Valley-Bitcoin-Users/events/232546018/. In this talk, Andreas discusses the concept of immutability and the essential characteristics that arise from energy-intensive Proof-of-Work. Want to hear more about Bitcoin and open blockchains? Follow on Twitter: @aantonop Visit my website: https://antonopoulos.com
Views: 28407 aantonop
Proof of WORK vs Proof of STAKE - Ask Doctor Bitcoin e4
 
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This week on #AskDoctorBitcoin, we look at the difference between proof-of-work & proof-of-stake and how they relate to securing a blockchain. Learn more at http://www.askdoctorbitcoin.com/ Produced by The Roger Wilco Agency http://rogerwilco.agency/ Blockchain * Marketing * Design * Video * Cognitive
Views: 277 Roger Wilco Agency
How Bitcoin Works - Computerphile
 
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Digital currency, how does it work, what's a data miner and will Bitcoin last? We asked Professor Ross Anderson of the University of Cambridge Computer Laboratory. The Problem with BitCoin: https://youtu.be/s2XHyzPA9Zc Chip & PIN Fraud: https://youtu.be/Ks0SOn8hjG8 $5 Computer – Raspberry Pi Zero: https://youtu.be/WR0ghM3U0M4 Why Computers Use Binary: https://youtu.be/thrx3SBEpL8 Public Key Cryptography: https://youtu.be/GSIDS_lvRv4 http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 357883 Computerphile
Become a Blockchain Developer/Programmer - Everything You Need to Know
 
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► SUBSCRIBE TO THIS CHANNEL ◄ For more videos on how to build decentralized applications on The Ethereum Blockchain: https://www.youtube.com/channel/UCY0xL8V6NzzFcwzHCgB8orQ?sub_confirmation=1 DOWNLOAD FREE VIDEO COURSES: http://www.dappuniversity.com/free-download The Ultimate Ethereum Dapp Tutorial http://www.dappuniversity.com/articles/the-ultimate-ethereum-dapp-tutorial Donate Ether to the channel: 0x39C7BC5496f4eaaa1fF75d88E079C22f0519E7b9 Website: http://dappuniversity.com/ Follow me on Twitter (@DappUniversity): https://twitter.com/DappUniversity Email me: [email protected]
Views: 176760 Dapp University
Mining & Consensus Algorithms 101 - Proof of Work, Proof of Stake, Proof of Burn, MasterNodes
 
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This is a brief guide to some of the different forms of consensus algorithms used with crypto currencies. Which one is best? Watch the video and decide for yourself. 📘Table of Contents: ◆ 00:08 Intro ◆ 00:53 Proof of Work Mining ◆ 06:06 Proof of Stake ◆ 09:16 Proof of Burn ◆ 11:30 MasterNodes ◆ 13:31 Final Thoughts ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● ⭐Links: 💻Proof of Work: https://en.bitcoin.it/wiki/Proof_of_work 💻Proof of Burn: https://en.bitcoin.it/wiki/Proof_of_burn 💻PIVX Proof of Stake: https://pivx.org/knowledge-base/myth-proof-of-stake-is-not-as-secure-as-proof-of-work/ 💻MasterNodes: https://blockonomi.com/masternode-guide/ ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● 🤑Support me on Patreon: https://goo.gl/wmY9D2 👇A special thanks to my Patreons: ◆Robert Savilonis (since Feb. 2018) ◆Jon Biggs (since Feb. 2018) ◆Milko Medero (since Mar. 2018) ◆Carl Birchenough (since Mar. 2018) ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● 👨‍👩‍👧‍👦 Social: ◆ Discord: https://goo.gl/v2wRbF ◆ Twitter: https://twitter.com/GooseTech100 ◆ Twitch: https://www.twitch.tv/goosetech ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● ⭐Links: ⛏MiningPoolHub: https://goo.gl/PbTw6J 💻Awesome Miner: https://goo.gl/4u1WVc 📺Mining Tutorial: https://goo.gl/4Zgb4d 💰CoinBase: https://goo.gl/wB6Z7h 💰KuCoin: https://goo.gl/7J8jHb 📈CoinTracker.info: https://goo.gl/xHWVei ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● 🤑Tips/Donations Graciously Accepted: ◆BTC: 1JhgmwdQ4SLjPVbvKKHg2NyRrQUmFkZMwz ◆BTCP: b1NDj9GifnJwAD4DfSHZmjLvakTYmBcGC1h ◆ETH: 0x1B06d92E01b33E20461a7eD379641877bb53AB20 ◆ETN: etnk1VBUHGA4RHxUPmc3Q43UaaoRvfero6USYBiZejkDSsvx42nBmtZAoKnux3WN7pd38qHsxVse6XQLRa4YfnmdA75CY1SB72 ◆IFX: iCzej7jwMDuCzyLZKcpXjQXQubyoxoU8u9 ◆LTC: LdtBYEPS3xzV1iMNaeeQ6maTGX3KcxrTaR ◆LUX: LV4eCbd8f4j1y6VxHd9VPMs82mu6Zam8XG ◆RVN: RWFU9V8X8yuVpNCACwqzDSuV3opc97dTgc ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● 🎧Music from audioblocks.com: http://audioblocks.refr.cc/ZFW24KF ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● 👍Please like this video if you find it helpful; leave comments below to tell me what you think. Thanks! Happy investing and God bless. ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● 💬Disclaimer: I am not a financial adviser. Please do all of your own research. I am not responsible for any damage done to your computer. I am not responsible for decisions you make regarding how you spend your own time or money. I am simply a hobby miner who likes to share knowledge.
Views: 1821 Goose-Tech
Bitcoin Q&A  Security in proof of work vs  proof of stake
 
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By Expert Andreas Antonopoulos Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and well-respected figures in bitcoin. 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 Please Subscribe to my Channel https://www.youtube.com/channel/UCFbMJbRJAGhwiFEd39vt4hg
Views: 3 Mellow In Japan
Cryptography on the Blockchain
 
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I have a LocalCrypto.sol library(i.e. all in solidity) that supports El Gamal Encryption, One out of Two ZKP (i.e. either yes or no is encrypted), Pederson Commitments, Inequality proof (i.e. two commitments DO NOT commit to the same data), Equality proofs (i.e. two commitments DO commit to the same data), Discrete log equality proofs, and publicly verifiable secret sharing. I’m currently organising the code for public release (let others experiment with cryptography on the blockchain) – i’d like to present the library, its capability, some projects I have used it in and how people can start using it today. Patrick McCorry is a Research Associate working with Sarah Meiklejohn at University College London. He previously worked with Andrew Miller at University of Illinois at Urbana Champaign (UIUC), and completed his PhD with Feng Hao at Newcastle University. His work focuses on cryptographic applications of the blockchain (i.e, e-voting over the blockchain).
Views: 843 Ethereum Foundation
Lecture 2 — How Bitcoin Achieves Decentralization
 
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Second lecture of the Bitcoin and cryptocurrency technologies online course. For the accompanying textbook, including the free draft version, see: http://bitcoinbook.cs.princeton.edu/ In this lecture (click the time to jump to the section): * Centralization vs. decentralization 1:12 * Distributed consensus 4:45 * Consensus without identity: the block chain 17:46 * Incentives and proof of work 35:43 * Putting it all together 55:39
Consensus Algorithms, Blockchain Technology and Bitcoin UCL   by Andreas M  Antonopoulos must watch
 
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An academic lecture by Andreas M. Antonopoulos explaining the consensus algorithm, "Proof of Work", used by bitcoin and many other blockchains. This talk was presented in collaboration with the Department of Computer Science, at University College London. Andreas is a UCL alum. Andreas 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. About the Creative Commons Licence: One goal of Creative Commons is to increase the amount of openly licensed creativity in “the commons” — the body of work freely available for legal use, sharing, repurposing, and remixing. when was blockchain technology invented when to use blockchain technology are is blockchain technology the future is blockchain technology the new internet is blockchain technology hackable is blockchain technology expensive can can blockchain technology be hacked can blockchain technology revive peer-to-peer lending what can blockchain technology be used for can you invest in blockchain technology blockchain technology can massively simplify banking will will blockchain technology be the ultimate disrupter will blockchain technology be the ultimate how will blockchain technology transform financial services how will blockchain technology transform blockchain technology will change the world blockchain technology will help auditing process blockchain technology will it make a difference blockchain technology will transform the practice of law blockchain technology will fail who who owns blockchain technology who invented blockchain technology who created blockchain technology who uses blockchain technology who makes blockchain technology who developed blockchain technology who has blockchain technology who is investing in blockchain technology which which blockchain technology is best which blockchain technology to learn what's blockchain technology where blockchain technology can be used which companies use blockchain technology where where blockchain technology is used where blockchain technology can be used where to learn blockchain technology where to study blockchain technology where to invest in blockchain technology what what blockchain technology to invest in what's blockchain technology how blockchain technology works how blockchain technology could change our lives how blockchain technology could change the world how blockchain technology could improve the tax system how blockchain technology is disrupting everything how blockchain technology could revolutionize the markets what is blockchain technology in banking what is blockchain technology ppt what is blockchain technology youtube what is blockchain technology quora what is blockchain technology pdf what is blockchain technology in hindi what is blockchain technology in healthcare what is blockchain technology in insurance what is blockchain technology video what can blockchain technology be used for what if blockchain technology revolutionised voting what is blockchain technology in supply chain why why blockchain technology is the future why blockchain technology why is blockchain technology important how how blockchain technology works how blockchain technology can change medicine how blockchain technology can enhance ehr operability how blockchain technology works pdf how blockchain technology is transforming the legal industry how blockchain technology related with iot how blockchain technology is redefining trust how blockchain technology can enhance the security how blockchain technology could change the world how blockchain technology will change the world how blockchain technology is disrupting everything how blockchain technology is changing real estate how blockchain technology is helping syrian refugees for ico promotion- our website:-https://authenticsignals.com/ direct contact to admin-telegram user name:- @Altsignalz for trading signals -telegram channel @perfectsignals143
Ever wonder how Bitcoin (and other cryptocurrencies) actually work?
 
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Bitcoin explained from the viewpoint of inventing your own cryptocurrency. Videos like these made possible by patreon: https://patreon.com/3blue1brown Protocol Labs: https://protocol.ai/ Interested in contributing? https://protocol.ai/join/ Special thanks to the following patrons: http://3b1b.co/btc-thanks Some people have asked if this channel accepts contributions in cryptocurrency form as an alternative to Patreon. As you might guess, the answer is yes :). Here are the relevant addresses: ETH: 0x88Fd7a2e9e0E616a5610B8BE5d5090DC6Bd55c25 BTC: 1DV4dhXEVhGELmDnRppADyMcyZgGHnCNJ BCH: qrr82t07zzq5uqgek422s8wwf953jj25c53lqctlnw LTC: LNPY2HEWv8igGckwKrYPbh9yD28XH3sm32 Supplement video: https://youtu.be/S9JGmA5_unY Music by Vincent Rubinetti: https://soundcloud.com/vincerubinetti/heartbeat Here are a few other resources I'd recommend: Original Bitcoin paper: https://bitcoin.org/bitcoin.pdf Block explorer: https://blockexplorer.com/ Blog post by Michael Nielsen: https://goo.gl/BW1RV3 (This is particularly good for understanding the details of what transactions look like, which is something this video did not cover) Video by CuriousInventor: https://youtu.be/Lx9zgZCMqXE Video by Anders Brownworth: https://youtu.be/_160oMzblY8 Ethereum white paper: https://goo.gl/XXZddT If you want to contribute translated subtitles or to help review those that have already been made by others and need approval, you can click the gear icon in the video and go to subtitles/cc, then "add subtitles/cc". I really appreciate those who do this, as it helps make the lessons accessible to more people. Music by Vince Rubinetti: https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown ------------------ 3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe, and click the bell to receive notifications (if you're into that). If you are new to this channel and want to see more, a good place to start is this playlist: http://3b1b.co/recommended Various social media stuffs: Website: https://www.3blue1brown.com Twitter: https://twitter.com/3Blue1Brown Patreon: https://patreon.com/3blue1brown Facebook: https://www.facebook.com/3blue1brown Reddit: https://www.reddit.com/r/3Blue1Brown
Views: 2365826 3Blue1Brown
What is BlockChain? How to get BlockChain Certification
 
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Blockchain Professional Certification Call: 7989349590 Email: [email protected] Become Certified Blockchain Professional Today!!! The technology most likely to change the next decade of business is not the social web, big , the cloud, robotics, or even artificial intelligence. Its the blockchain, the technology behind digital currencies like . Blockchain has the potential to change the way we buy and sell, interact with and verify the authenticity of everything from property titles to organic vegetables. Blockchain is a meta-technology that has infinite possibilities waiting to be explored. SSBI Institute is proud to offer the first, comprehensive, self-paced, Blockchain Certification course. The Blockchain Certification course is made up of 10 self-study learning modules. each module, the student is tested and must score an 80% or higher to move on to the next module. Complex topics like hashing, mining, consensus, proof of work, proof of stake, RPCA, proof of proof, PBFT, Segregated Witness, Side Chains, etc. are explained through a very graphical approach. Over 1,000 animations are in these modules to make diagrams come to life and keep the attendees focused on the most important point of the moment. There is even a slow-motion, instant replay to help cement the idea of how Immutability is attained through Blockchains! ONLINE SELF STUDY Administered Through an Interactive Learning Management System 10 MODULES 10 Online Sessions Quiz at the End of Each Module FINAL EXAM Pass the Final Exam of 300 Points, and Get Quallified CERTIFICATION Final Exam Become a Certified Blockchain Professional Modules: What is Blockchain? How do BlockChain Work? Identity & Transactions Gaining Consensus Practical Byzantine Fault Tolerance (PBFT) and Proof of Stake Other Proofs of Consensus Proof of Proof, Segregated Witness, and Sidechains Smart Contracts & Oracles Comparision of Popular Blockchains Sample Applications and the Future of Blockchains Price: In Association with: BlockChain Online. Contact for the Referral Link: Certified Blockchain Professional : 15,000/- INR (We accept payments through Credit/Debit and Internet Banking only.) Duration: 45 Days Type: Online, Self-paced, Self-study Minimum Quallification: Graduation (From any Recognize University) Admissions: Open ( Seats) Why With US: Most of the Institutes charging 20,000 rs and we 15,000 rs Only Contact for the Referral Link: Once you pay 15,000 rs Certification you will receive 1000rs CASH BACK. Lucky Winner will get 15,000 Rs CASH BACK**conditions apply** ***Once you enroll you need to send your confirmation with out fail to email Any One above 18years, IT Professionals, Software EMp,Housewifes,Work From Home,Part time Income
Views: 138 Vikas JioCoin
🎓 Proof of Work ? Stake ? Initial Coin Offering ? 🤔
 
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Dans cette vidéo on traite des Proof Of Work, des Proof Of Stake et du Proof Of Burn, tout en faisant un rapide survol du concept des Initial Coin Offering. ===================================== Pour suivre la chaîne sur Twitter : https://goo.gl/95nZG7 Facebook : https://goo.gl/wypskE ===================================== Vous abonner 🔔 permet à la chaîne de se faire connaître et de faire croître la reconnaissance de ces nouvelles technologies à plus de monde, n'hésitez donc pas!
Views: 120 G La Crypto Facile
Bitcoin Mining in 4 Minutes - Computerphile
 
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When a Bitcoin Miner Mines, what is happening? Dr Mike Pound exposes the process.. note: at 3:39 Mike mentions a Bitcoin is mined every ten minutes when it is actually a block that is mined every ten minutes, at time of recording a successful block generates 12.5 new Bitcoins. Password Cracking: https://youtu.be/7U-RbOKanYs Onion Routing (TOR): https://youtu.be/QRYzre4bf7I https://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 90557 Computerphile
Bitcoin Internals: Verifying Merkle Roots using Merkle Proofs in JavaScript
 
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In this video we expand on the previous one where we computed a given list of transactions Merkle root using Merkle trees. We will now compute a Merkle proof for a given transaction, allowing clients to validate that a transaction exists in a block without having to download it's entire contents. This technique is used widely in light-weight Bitcoin clients (using Simplified Payment Verification). We codify a JavaScript solution which will create a Merkle proof for a transaction and then do the inverse and validate that proofs claim based on the blocks Merkle root. Discussed in the video: - https://bitcoin.org/en/glossary/simplified-payment-verification - https://www.bitcoinbook.info/ The source-code for this video can be found here: https://gist.github.com/eddmann/6b8d0ddd3123c37f296b7680b8fa198a
Views: 3459 Edd Mann
PROOF-OF-STAKE CONSENSUS ALGORITHM
 
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Proof of Stake is another consensus algorithm being evaluated and slowly adopted by a few Blockchain networks. Here, miners do not have to solve any mathematical puzzle and burn computing power and electricity. There is no competition for validating transactions to earn rewards amongst miners. Miners are simply ‘tapped on the shoulder’ or nominated to verify each transaction. Why is it called proof-of-stake then? That’s because miners have to stake a certain number of coins of the Blockchain network where they want to participate in the consensus process. The more cryptocurrency you stake the higher your chances of getting nominated to verify a transaction and getting the reward for doing so. Amount of cryptocurrency could also be replaced by or used alongside age of the miner in the Blockchain. You probably understand by now that miners are then not even the right name to call them by, let’s call them creators. They create blocks after all even if they do not ‘mine’ the blocks. Zeonlab is a Blockchain consulting and development company. We develop applications/products on Ethereum, Hyperledger and other Blockchain platforms. We have some of the smartest Blockchain engineers in India, all from the IITs (Indian Institute of Technology) We work with companies on identifying and developing use-cases (both Proofs-of-Concept and full-scale implementation) on Blockchain. We create the Proof-of-Concept first and do an end-to-end implementation on the existing tech stack of the client. It is typically followed by a testing and full-scale implementation phase. We also help create Blockchain capabilities in clients by training their employees. Website: https://www.zeonlab.com/ Facebook: https://www.facebook.com/zeonlabblockchainstrategyandapps/ Twitter: https://twitter.com/zeonlab Linkedin: https://www.linkedin.com/company/zeon-lab/
"Bitcoin's DNA - Proof Of Work" - Andreas Antonopoulos
 
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In this interesting talk Andreas presents the concept of Bitcoin's DNA, Proof-of-Work, what he describes as the planetary scale digital monument of immutability. THIS IS AN EXTRACT FROM ORIGINAL VIDEOCLIP THAT CAN BE FOUND HERE: https://www.youtube.com/watch?v=rsLrJp6cLf4
Views: 2445 Bitcoin TV
Bernardo David, IOHK Research, Proof-of-Stake Protocol
 
02:45:07
This is the regular seminar of the Input Output and Tokyo Tech/Tanaka Laboratory members. The topic this time is the Proof-of-Stake Protocol designed by Aggelos Kiayias, Ioannis Konstantinou, Alexander Russel, Bernardo David and Roman Oliynykov. Bernardo, the presenter, divided the talk in two parts: the first reviews main topics in Cryptography which would help the viewer to understand the presentation and the protocol itself. Whereas the second is about the protocol itself. First Part - Cryptography background - Commitments - Coin Tossing/Guaranteed Output Delivery - Verifiable Secret Sharing Second Part - Proof-of-Stake Protocol - Comparison Proof-of-Work (PoW) and Proof-of-Stake (PoS) - Follow the Satoshi technique - The protocol The paper is ``A Provably Secure Proof-of-Stake Blockchain Protocol'' eprint.iacr.org/2016/889.pdf -- https://iohk.io/library/#9BKRHCSI -- Founded in 2015 by Jeremy Wood and Charles Hoskinson, IOHK is a technology company committed to using peer-to-peer innovations to provide financial services to the three billion people who don’t have them. We are an engineering company that builds cryptocurrencies and block chains for academic institutions, government entities and corporations. We are a decentralized company that loves small innovative teams forming and executing ideas that cause cascading disruption. iohk.io
Views: 15269 IOHK
Bitcoin Q&A: Nonces, mining, and quantum computing
 
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Who generates the nonce? What makes it random? How is nonce-guessing important to the competitive process of mining? What happens if the hashing algorithm (SHA-256) was compromised? Is quantum computing a threat? More on nonces and the mining process: https://github.com/bitcoinbook/bitcoinbook/blob/8ae3c056fb257111bda8883d9d204e8476f9870c/ch09.asciidoc These questions are from the MOOC 7.2 and 9.2, which took place on February 26th 2017 and February 23rd 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: Consensus Algorithms, Blockchain Technology, and Bitcoin - https://youtu.be/fw3WkySh_Ho Advanced Bitcoin Scripting Part 1: Transactions and Multisig - https://youtu.be/8FeAXjkmDcQ Advanced Bitcoin Scripting Part 2: SegWit, Consensus, and Trustware - https://youtu.be/pQbeBduVQ4I What is Consensus: Rules without Rulers - https://youtu.be/2tqo7PX5Pyc Forkology: A Study of Forks for Newbies - https://youtu.be/rpeceXY1QBM Bitcoin: Where the Laws of Mathematics Prevail - https://youtu.be/HaJ1hvon0E0 Software distribution security - https://youtu.be/_V0vqy046YM What is mining? - https://youtu.be/t4p4iMqmxbQ The mining process - https://youtu.be/L4Xtau0YMJw Miners, pools, and consensus - https://youtu.be/JHz7LM4ncLw Cryptographic primitives - https://youtu.be/RIckQ6RBt5E The rules of Bitcoin (part 1) - https://youtu.be/VnQu4uylfOs The rules of Bitcoin (part 2) - https://youtu.be/vtIp0GP4w1E Rules versus rulers - https://youtu.be/9EEluhC9SxE The value of proof-of-work - https://youtu.be/ZDGliHwstM8 Migrating to post-quantum cryptography - https://youtu.be/dkXKpMku5QY Could a state-sponsored 51% attack work? - https://youtu.be/KUd8ZGgm6Qo Honest nodes and consensus - https://youtu.be/KAhY2ymI-tg Spam transactions and Child Pays For Parent (CPFP) - https://youtu.be/t3c0E4fkSNs Is Bitcoin a democracy? - https://youtu.be/TC3Hq76UT5g Decentralized power, leaderless governance - https://youtu.be/E5VbDlQTPzU Scaling, trust, and trade-offs - https://youtu.be/vCxmHwqyJWU What is the role of nodes? - https://youtu.be/fNk7nYxTOyQ Why running a node is important - https://youtu.be/oX0Yrv-6jVs Lightning, full nodes, and miners - https://youtu.be/dlJG4OHdJzs Running nodes and payment channels - https://youtu.be/ndcfBfE_yoY What happens during a fork? - https://youtu.be/XBk8hBJ1xVo SegWit adoption - https://youtu.be/KCsTVTRk6I4 Spam transactions and Child Pays For Parent (CPFP) - https://youtu.be/t3c0E4fkSNs Energy consumption - https://youtu.be/2T0OUIW89II Solar energy and mining in space - https://youtu.be/cusakcpa8AM Bitmain and ASICBoost allegations - https://youtu.be/t6jJDD2Aj8k 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 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: 10385 aantonop
Lecture 2.4 – Incentives and Proof of Work [Bitcoin and Cryptocurrencies]
 
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So, in the previous section, we got a basic look at BitCoin's consensus algorithm and a good intuition for why we believe that it's secure. But recall that at the beginning of the lecture I told you that BitCoin's decentralization is partly a technical mechanism and partly clever incentive engineering. So far, we've mostly looked at the technical mechanism. Now let's talk about the incentive engineering that happens in BitCoin. A lecture from the Coursera course Bitcoin and Cryptocurrency Technologies, as taught by Arvind Narayanan, Joseph Bonneau, Edward Felten, Andrew Miller, and Steven Goldfeder of Princeton University. Enroll in the Coursera course at https://www.coursera.org/learn/cryptocurrency. Check out a free draft of the textbook at https://d28rh4a8wq0iu5.cloudfront.net/bitcointech/readings/princeton_bitcoin_book.pdf.
Views: 119 Colin McDonnell
Learn Blockchain to future-proof your career!
 
01:35
Understand the fundamentals and impact of blockchain, and work with leading industry experts to build a real-world strategy for your business: https://learn.rmitonline.edu.au/blockchain You’ve probably heard of blockchain. It’s the technology that powers a US$180billion cryptocurrency industry. But the truth is, bitcoin is only a small part of blockchain’s potential. We’re here to show you the big picture. RMIT is the first Australian university to offer a dedicated blockchain short course: Developing Blockchain Strategy. This isn’t a course that is all about theory. We’ve partnered with industry leaders, like Accenture and Stone & Chalk, to develop a hands-on blockchain program. It’s a course for people who want to build real-world strategies and upskill fast. Less essay, more application. Learn the foundations of blockchain, study with global thought leaders and get mentoring from industry experts. Why this blockchain course? Learn from global thought leaders: Developing Blockchain Strategy has been co-designed by the RMIT Blockchain Innovation Hub – a global team of thought leaders, researchers and experts in cryptoeconomics. It’s the cutting edge of blockchain thinking. Get job ready: We’ve partnered with industry experts like Stone and Chalk and Accenture, to make this program as practical as possible. You won’t just get a theoretical understanding of blockchain: you’ll learn how to use it. Future-proof your career: We’ve built this course with companies that understand blockchain. We’ll start with the blockchain fundamentals, then use them to develop real-world business strategies. It’s your chance to leapfrog the competition. So, ready to get started? https://learn.rmitonline.edu.au/blockchain
Views: 1206 RMIT Future Skills
Is Proof of Stake an Unfair System?
 
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Let's talk about proof of stake today. As many of you will know, Ethereum will one day transition to an entirely proof of stake based system. Critics (especially Bitcoin Maximalists) criticise proof of stake as an unfair system that "makes the rich richer for little to no work". Is this a fair representation? Is it any less fair than proof of work? That's what I'll be discussing in today's video. (And apologies for the poor audio!!) Crypto Merch Link: https://www.moonmerch.co/ DISCLAIMER: This is NOT financial advice. I am just offering my opinions. I am not responsible for any investment decisions that you choose to make. ▲▲▲▲▲ Looking to get started with cryptocurrencies? Check out my crash course here: https://louis-thomas.teachable.com/p/buying-bitcoin-crash-course DONATIONS ♥ ETH: 0xc12f59c4e23dccd369437bbdb09470879d8c0825 ♥ BTC: 1L2LswVmTobmEK8dy6Yw9nWx93Z1zZ1jb3 ♥ LTC: LRXk5EwrR6VJYJcLYZLNY5B1uhoiUchtF5 ♥ GBYTE: 5QRFNHCHE4FN3OR5REYDM7BFJP7EPWIU ♥ Dash: XyAPcaHdZJKuXiruHkAXkKgCMWHfaPFVgc ♥ ETC: 0x3bec3f9e112e719330d1732d60b02724b1b5a76c ♥ ZEC: t1gGY496794uEC4dTPiXitU8nYgXGLm78HH ♥ DGE: DFoVXJTiGKXTPUeztrpmYEWaHtXrBK452y ESSENTIAL CRYPTO RESOURCES ♦ Recommended place to buy Bitcoin/Ethereum: COINBASE - Sign up here: https://www.coinbase.com/join/5897724... ♦ Recommended Wallet: LEDGER NANO S - Available here: https://www.ledgerwallet.com/r/3c47 ♦ Recommended Exchange: (TBA) SOCIAL MEDIA LINKS ● Facebook: https://www.facebook.com/LouisThomasC... ● Twitter: https://twitter.com/LouisThomasYT ● Instagram: https://www.instagram.com/louisthomaschannel ● Snapchat: louisxthomas ● Steemit: https://steemit.com/@louisthomas CHANNEL RESOURCES ■ My Book: How to Choose a University Available here: http://tinyurl.com/y87e2ce6 ■ Camera: Canon G7X Mark II Available here: https://amzn.to/2mSqW6I ■ Microphone: RODE VideoMic GO Available here: http://tinyurl.com/y9rceoer ■ Tripod: Polaroid 184cm Available here: http://tinyurl.com/yarefpr9
Views: 3691 Louis Thomas
IOHK | Ouroboros Genesis: A Provably Secure Proof-of-Stake Blockchain Protocol
 
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Ouroboros Genesis - New research for Cardano We’re very proud to announce Ouroboros Genesis, a new paper from the IOHK research team. This latest version of Ouroboros, the algorithm powering Cardano, is a step forward in the cryptography that powers cryptocurrency systems. In this video, filmed at the IOHK blockchain technology lab at the University of Edinburgh, Professor Kiayias explains the research. For the first time, new users joining the blockchain can bootstrap from the genesis block, and do not need a checkpoint block or any prior knowledge of the number of users active in the system. This feature was previously not possible in proof of stake distributed ledgers while it was a hallmark of proof-of-work protocols. This means that Ouroboros can now match the security guarantees of proof-of-work protocols like Bitcoin in a way that was previously thought infeasible. This advancement is the culmination of a research path that systematically tackled challenges in proof of stake, beginning with Ouroboros, progressing to Ouroboros Praos, and now reaching Ouroboros Genesis. The Ouroboros research, led by Professor Aggelos Kiayias, IOHK Chief Scientist, has been developed with a rigorous discipline. Ouroboros was peer reviewed by the leading cryptography conference, Crypto 2017, and Ouroboros Praos is similarly due to be presented at sister event Eurocrypt 2018 next week. The research is being progressively implemented in Cardano. Read the research paper "Composable Proof-of-Stake Blockchains with Dynamic Availability" here: https://iohk.io/research/papers/#AQZE2XCV Ouroboros | IACR Crypto-2017 https://youtu.be/NlmD8W8cEoA IOHK | Developing a secure proof of stake algorithm https://youtu.be/a6G3M2ZQEXc -- https://iohk.io/team/aggelos-kiayias/ Prof Aggelos Kiayias is the Chair in Cyber Security and Privacy at the University of Edinburgh. His research interests are in computer security, information security, applied cryptography and foundations of cryptography with a particular emphasis in blockchain technologies and distributed systems, e-voting and secure multiparty protocols as well as privacy and identity management. He joins IOHK as chief scientist through a long-term consulting agreement between IOHK and the University of Edinburgh, UK, where he is based and continues to do research and teach courses in cyber security and cryptography. Prof Kiayias is also Professor in Residence (gratis) at the University of Connecticut, USA, and Associate Professor of Cryptography and Security (on leave) at the National and Kapodistrian University of Athens, Greece. Prof Kiayias’s cyber security research over the years has been funded by the Horizon 2020 programme (EU), the European Research Council (EU), the General Secretariat for Research and Technology (Greece), the National Science Foundation (USA), the Department of Homeland Security (USA), and the National Institute of Standards and Technology (USA). He has received an ERC Starting Grant, a Marie Curie fellowship, an NSF Career Award, and a Fulbright Fellowship. He holds a Ph.D. from the City University of New York and he is a graduate of the Department of Mathematics at the University of Athens. He has more than 100 publications in journals and conference proceedings in the area. -- Input Output See more at: https://iohk.io Get our latest news updates: https://iohk.io/blog/ Meet the team: https://iohk.io/team/ Learn about our projects: https://iohk.io/projects/cardano/ Read our papers: http://iohk.link/paper-ouroboros Visit our library: https://iohk.io/research/library/ In the press: https://iohk.io/press/ Work with us: https://iohk.io/careers/
Views: 16790 IOHK
Lecture 8.5 – Proof-of-Stake "Virtual Mining" [Bitcoin and Cryptocurrencies]
 
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A lecture from the Coursera course Bitcoin and Cryptocurrency Technologies, as taught by Arvind Narayanan, Joseph Bonneau, Edward Felten, Andrew Miller, and Steven Goldfeder of Princeton University. Enroll in the Coursera course at https://www.coursera.org/learn/cryptocurrency. Check out a free draft of the textbook at https://d28rh4a8wq0iu5.cloudfront.net/bitcointech/readings/princeton_bitcoin_book.pdf.
Views: 119 Colin McDonnell
What is Proof of Work?
 
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Proof of work is an algorithm. The most famous one is the one that is used by #Bitcoin. Subscribe for more: http://bit.ly/2EN5Ded You will get info on coins and explanation of tech behind it.
Views: 23 ASAP crypto
Blockchain: Massively Simplified | Richie Etwaru | TEDxMorristown
 
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Richie Etwaru, discusses the opportunity and implications of blockchain as a paradigm to slow/chose the expanding trust gap in commerce. He unpacks blockchain to a level of simplicity to be consumed by those that are just starting to understand and explore the paradigm. He lays out a current state of commerce, suggesting that every company is currently at risk of being disrupted or incurring severe strain from a blockchain version of itself. Professionally, Richie Etwaru is a c-level at a Fortune 500 Company, an author, the owner of international patents, the founder of multiple ventures, an experienced keynote speaker, an angel investor, a member of advisory boards, and a recognized thought leader in the area of digital, technology, and design. Specific to this TEDx talk, Richie is an adjunct professor of blockchain management at Syracuse University in New York, he has delivered over 100 blockchain keynotes across the world, he has written well read blockchain blogs, he has been interviewed on blockchain in online TV shows, and has advised governments and venture funds on blockchain opportunities. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx
Views: 1164442 TEDx Talks
Part 2 | How The Blockchain Works | Crypto Crash Course
 
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Subscribe: http://www.youtube.com/user/mattinconline?sub_confirmation=1 Welcome to Part 2; how the blockchain works! 00:16 Recap; blockchain as a digital ledger and verification system 00:38 Trust in a currency is the key 01:32 How the blockchain works, banking example 01:55 The way banks move and transact money 03:00 How the blockchain works and moves value 05:24 The blockchain is open, trusted and secure 06:35 Recap; what the blockchain is and how it works In part 1 we went over what the Blockchain is and how the digital ledger works with changing ownership of money. Now, let’s look at the fundamental word for any currency in the world… TRUST. Why should you trust it? For a moment let’s look at a banking network. They have a main frame computer that all transaction and information flows through. If you wanted to send money to another account with a different account, it would look like this. This is a simplified version but you get the point. The network on the blockchain looks like this. (Diagram in video). Individuals all over the world have computers that are within the network and communicate with one another. The purpose of this is to make sure that the blockchain is consistently updated correctly as the computers communicate with one another. This means that the majority or all the network must agree on the status of the ledger at any given time. This is called consensus. This creates security and authenticity within the network. The way the blockchain stays up to date is through Proof of Work. Here is how proof of work mining works: 1. A transaction is made and the network attempts to talk and verify it. 2. A math problem is solved, yes a math problem through complex algorithms which we won’t go into heavily. But whoever solves this problem on the network will update the ledger and all other computers will choose to agree or disagree upon the transaction. 3. The ledger is updated and the information has transferred and will be stamped onto the blockchain forever. 4. This happens consistently every four minutes. What happens to the people who solve the problem? Two things, they get rewarded for the new coins generated from solving the math problem. Then, they make the new block which gets added to the chain. What we have here is an impossible way to duplicate money, transparency within the network and authenticity. Next video: https://www.youtube.com/watch?v=ytw2vIqgJnU See you over there ☺ Down With That by Twin Musicom is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/) A
Views: 812 Crypto Enthusiast
Understanding Consensus Algorithms, Blockchain Technology,  plus Bitcoin UCL
 
01:24:22
An academic lecture by Andreas M. Antonopoulos explaining the consensus algorithm, "Proof of Work", used by bitcoin and many other blockchains. If you can wrap your thoughts around this lecture you will be ahead of most. This talk was presented in collaboration with the Department of Computer Science, at University College London. Andreas is a UCL alum.
Views: 17 Chuck Crypto
Amazon is Using Ethereum Blockchain Technology! ($ETH, $AMZN)
 
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► SUBSCRIBE TO THIS CHANNEL ◄ For more videos on how to build decentralized applications on The Ethereum Blockchain: https://www.youtube.com/channel/UCY0xL8V6NzzFcwzHCgB8orQ?sub_confirmation=1 DOWNLOAD FREE VIDEO COURSES: http://www.dappuniversity.com/free-download How to Build Ethereum Dapp (Decentralized Application Development Tutorial) https://youtu.be/3681ZYbDSSk Donate Ether to the channel: 0x39C7BC5496f4eaaa1fF75d88E079C22f0519E7b9 Website: http://dappuniversity.com/ Follow me on Twitter (@DappUniversity): https://twitter.com/DappUniversity Email me: [email protected]
Views: 2627 Dapp University
What is Bitcoin | Bitcoin क्या है | Earn Bitcoin | Bitcoin Wallet |
 
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What is Bitcoin | Bitcoin क्या है | Earn Bitcoin | Bitcoin Wallet | What is Bitcoin- Bitcoin is a worldwide cryptocurrency and digital payment system called the first decentralized digital currency, as the system works without a central repository or single administrator. It was invented by an unknown person or group of people under the name Satoshi Nakamoto and released as open-source software in 2009. The system is peer-to-peer, and transactions take place between users directly, without an intermediary. These transactions are verified by network nodes and recorded in a public distributed ledger called a blockchain. Bitcoins are created as a reward for a process known as mining. They can be exchanged for other currencies, products, and services. As of February 2015, over 100,000 merchants and vendors accepted bitcoin as payment. Bitcoin can also be held as an investment. According to research produced by Cambridge University in 2017, there are 2.9 to 5.8 million unique users using a cryptocurrency wallet, most of them using bitcoin. Bitcoin Mining- Mining is a record-keeping service done through the use of computer processing power. Miners keep the blockchain consistent, complete, and unalterable by repeatedly verifying and collecting newly broadcast transactions into a new group of transactions called a block. Each block contains a cryptographic hash of the previous block, using the SHA-256 hashing algorithm, which links it to the previous block, thus giving the blockchain its name. To be accepted by the rest of the network, a new block must contain a so-called proof-of-work. The proof-of-work requires miners to find a number called a nonce, such that when the block content is hashed along with the nonce, the result is numerically smaller than the network's difficulty target. This proof is easy for any node in the network to verify, but extremely time-consuming to generate, as for a secure cryptographic hash, miners must try many different nonce values (usually the sequence of tested values is 0, 1, 2, 3, ... before meeting the difficulty target. Subscribe youtube - https://youtube.com/c/babakagyan Instagram - https://instagram.com/babakagyan
Views: 328 Branded Gentleman
IOHK | Consensus protocols - efficiency
 
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Bernardo David is an Assistant Professor at the Tokyo Institute of Technology. He holds a Ph.D. in Computer Science from Aarhus University obtained in 2017 under the supervision of Ivan Damgård and Jesper Buus Nielsen. He has also been a long-term visitor at the NTT Secure Plaftorm Laboratories working with Tatsuaki Okamoto and Masayuki Abe and at the Cryptography Group at Bar Ilan University working with Yehuda Lindell. Bernardo is interested in a broad range of topics in cryptography and information theory. His current focus is on theoretical and practical aspects of secure multiparty computation and blockchains/cryptocurrencies. https://iohk.io/team/bernardo-david/ Developing a secure proof of stake algorithm is one of the big challenges in cryptocurrency, and a proposed solution to this problem won the attention of the academic community. Several hundred cryptographers from around the world arrived at the University of California Santa Barbara on Sunday for the flagship annual event of their field, Crypto 2017. Over several days, they present cutting edge research for the scrutiny of their peers, while in the evenings they continue discussions with friends and colleagues over dinner on the university campus, with the inspiring backdrop of the Santa Ynez mountains meeting the Pacific ocean behind them. https://iohk.io/press/ Ouroboros, developed by a team led by IOHK chief scientist Aggelos Kiayias, made it through a tough admission process for the prestigious conference. This year, 311 papers were submitted and of those 72 were accepted. Only three papers at the conference were on the subject of blockchain. All three papers were supported by IOHK funding. Speaking after his presentation, Professor Kiayias said: “We’re very happy that we had the opportunity to present Ouroboros at the conference. The protocol and especially its security analysis were very well received by fellow cryptographers.” “Our next steps will be to focus on the next version of the protocol, Ouroboros Praos which improves even further the security and performance characteristics of the protocol.” The Ouroboros protocol stands out as the first proof of stake algorithm that is provably secure, meaning that it offers security guarantees that are mathematically proven. This is essential for a protocol that is intended to be used in cryptocurrency, an infrastructure that must be relied on to carry billions of dollars worth of value. In addition to security, if blockchains are going to become infrastructure for new financial systems they must be able to comfortably handle millions of users. The key to scaling up is proof of stake, a far more energy efficient and cost effective algorithm, and as such this research represents a significant step forward in cryptography. Ouroboros also has the distinction of being implemented – the protocol will be an integral part of Cardano, a blockchain system currently in development. https://iohk.io/research/papers/#XJ6MHFXX https://iohk.io/projects/cardano/ There were two other papers presented at the bitcoin session on Monday. The Bitcoin Backbone Protocol with Chains of Variable Difficulty, was produced by a team of three researchers and included Prof Kiayias. It is a continuation of previous research into Bitcoin, which was itself the first work to prove security properties of its blockchain. A third paper on the subject of bitcoin was presented, Bitcoin as a Transaction Ledger: A Composable Treatment. Other notable talks at the conference included a presentation by John Martinis, an expert on quantum computing and former physics professor at the University of California Santa Barbara, who is now working at Google to build a quantum computer. Leading cryptographers at the conference included Whitfield Diffie, pioneer of the public key cryptography that made Bitcoin possible, and Ron Rivest, Adi Shamir, and Leonard Adleman, who came up with the RSA public-key cryptosystem that is widely used for secure data transmission. https://www.forbes.com/sites/amycastor/2017/08/23/at-crypto-2017-blockchain-presentations-focus-on-proofs-not-concepts/#6e558d1a7b70 https://iohk.io/team/aggelos-kiayias/ https://iohk.io/team/bernardo-david/ https://iohk.io/team/peter-gazi/ -- Input Output See more at: https://iohk.io Get our latest news updates: https://iohk.io/blog/ Meet the team: https://iohk.io/team/ Learn about our projects: https://iohk.io/projects/cardano/ Read our papers: http://iohk.link/paper-ouroboros Visit our library: https://iohk.io/research/library/ In the press: https://iohk.io/press/ Work with us: https://iohk.io/careers/ See more on Cardano: https://iohk.io/projects/cardano/ --
Views: 432 IOHK
Bitcoin Q&A: Genesis block and coinbase transactions
 
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How were the first bitcoins created? Who was mining in those early days? What is a coinbase transaction and how do miners integrate it within each block? Genesis block code: https://github.com/bitcoinbook/bitcoinbook/blob/4bad0fb922c26c9088402aefe95cbf4276f2e334/code/satoshi-words.cpp More on coinbase transactions: https://github.com/bitcoinbook/bitcoinbook/blob/f8b883dcd4e3d1b9adf40fed59b7e898fbd9241f/ch06.asciidoc Note: "Coinbase" transactions should not be confused with the centralised California-based exchange, Coinbase Inc. These questions are from the MOOC 9.2 session, which took place on February 23rd 2018. 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: Consensus Algorithms, Blockchain Technology, and Bitcoin - https://youtu.be/fw3WkySh_Ho Advanced Bitcoin Scripting Part 1: Transactions and Multisig - https://youtu.be/8FeAXjkmDcQ What is Consensus: Rules without Rulers - https://youtu.be/2tqo7PX5Pyc Forkology: A Study of Forks for Newbies - https://youtu.be/rpeceXY1QBM Bitcoin: Where the Laws of Mathematics Prevail - https://youtu.be/HaJ1hvon0E0 Who is Satoshi Nakamoto? - https://youtu.be/1iEv-gUZNx4 Software distribution security - https://youtu.be/_V0vqy046YM What is mining? - https://youtu.be/t4p4iMqmxbQ Miners, pools, and consensus - https://youtu.be/JHz7LM4ncLw The mining process - https://youtu.be/L4Xtau0YMJw Nonces, mining, and quantum computing - https://youtu.be/d4xXJh677J0 The rules of Bitcoin (part 1) - https://youtu.be/VnQu4uylfOs The rules of Bitcoin (part 2) - https://youtu.be/vtIp0GP4w1E Rules versus rulers - https://youtu.be/9EEluhC9SxE The value of proof-of-work - https://youtu.be/ZDGliHwstM8 Could a state-sponsored 51% attack work? - https://youtu.be/KUd8ZGgm6Qo Honest nodes and consensus - https://youtu.be/KAhY2ymI-tg Spam transactions and Child Pays For Parent (CPFP) - https://youtu.be/t3c0E4fkSNs Is Bitcoin a democracy? - https://youtu.be/TC3Hq76UT5g Decentralized power, leaderless governance - https://youtu.be/E5VbDlQTPzU Scaling, trust, and trade-offs - https://youtu.be/vCxmHwqyJWU What is the role of nodes? - https://youtu.be/fNk7nYxTOyQ Why running a node is important - https://youtu.be/oX0Yrv-6jVs Lightning, full nodes, and miners - https://youtu.be/dlJG4OHdJzs Running nodes and payment channels - https://youtu.be/ndcfBfE_yoY What happens during a fork? - https://youtu.be/XBk8hBJ1xVo SegWit adoption - https://youtu.be/KCsTVTRk6I4 Spam transactions and Child Pays For Parent (CPFP) - https://youtu.be/t3c0E4fkSNs Energy consumption - https://youtu.be/2T0OUIW89II Solar energy and mining in space - https://youtu.be/cusakcpa8AM Bitmain and ASICBoost allegations - https://youtu.be/t6jJDD2Aj8k 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 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: 6692 aantonop
Ouroboros presentation | IACR Crypto-2017
 
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Filmed on location at Crypto 2017, the 37th International Cryptology Conference. The event was held at the University of California, Santa Barbara (UCSB) August 20-24 2017. The academic program covers all aspects of cryptology. The conference is sponsored by the International Association for Cryptologic Research (IACR), in cooperation with the Computer Science Department of UCSB. https://www.iacr.org/conferences/cryp... Developing a secure proof of stake algorithm is one of the big challenges in cryptocurrency, and a proposed solution to this problem won the attention of the academic community. https://bitcoinmagazine.com/articles/iohk-launches-cardano-blockchain-ada-now-trading-bittrex/?utm_content=buffered6c6&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer Several hundred cryptographers from around the world arrived at the University of California Santa Barbara on Sunday for the flagship annual event of their field, Crypto 2017. Over several days, they present cutting edge research for the scrutiny of their peers, while in the evenings they continue discussions with friends and colleagues over dinner on the university campus, with the inspiring backdrop of the Santa Ynez mountains meeting the Pacific ocean behind them. https://iohk.io/press/ Ouroboros, developed by a team led by IOHK chief scientist Aggelos Kiayias, made it through a tough admission process for the prestigious conference. This year, 311 papers were submitted and of those 72 were accepted. Only three papers at the conference were on the subject of blockchain. All three papers were supported by IOHK funding. Speaking after his presentation, Professor Kiayias said: “We’re very happy that we had the opportunity to present Ouroboros at the conference. The protocol and especially its security analysis were very well received by fellow cryptographers.” “Our next steps will be to focus on the next version of the protocol, Ouroboros Praos which improves even further the security and performance characteristics of the protocol.” The Ouroboros protocol stands out as the first proof of stake algorithm that is provably secure, meaning that it offers security guarantees that are mathematically proven. This is essential for a protocol that is intended to be used in cryptocurrency, an infrastructure that must be relied on to carry billions of dollars worth of value. In addition to security, if blockchains are going to become infrastructure for new financial systems they must be able to comfortably handle millions of users. The key to scaling up is proof of stake, a far more energy efficient and cost effective algorithm, and as such this research represents a significant step forward in cryptography. Ouroboros also has the distinction of being implemented – the protocol will be an integral part of Cardano, a blockchain system currently in development. https://iohk.io/research/papers/#XJ6M... https://iohk.io/projects/cardano/ There were two other papers presented at the bitcoin session on Monday. The Bitcoin Backbone Protocol with Chains of Variable Difficulty, was produced by a team of three researchers and included Prof Kiayias. It is a continuation of previous research into Bitcoin, which was itself the first work to prove security properties of its blockchain. A third paper on the subject of bitcoin was presented, Bitcoin as a Transaction Ledger: A Composable Treatment. Other notable talks at the conference included a presentation by John Martinis, an expert on quantum computing and former physics professor at the University of California Santa Barbara, who is now working at Google to build a quantum computer. Leading cryptographers at the conference included Whitfield Diffie, pioneer of the public key cryptography that made Bitcoin possible, and Ron Rivest, Adi Shamir, and Leonard Adleman, who came up with the RSA public-key cryptosystem that is widely used for secure data transmission. https://iohk.io/team/aggelos-kiayias/ https://iohk.io/team/bernardo-david/ https://iohk.io/team/peter-gazi/ -- Input Output See more at: https://iohk.io Get our latest news updates: https://iohk.io/blog/ Meet the team: https://iohk.io/team/ Learn about our projects: https://iohk.io/projects/cardano/ Read our papers: http://iohk.link/paper-ouroboros Visit our library: https://iohk.io/research/library/ In the press: https://iohk.io/press/ Work with us: https://iohk.io/careers/ See more on Cardano: https://iohk.io/projects/cardano/ --
Views: 8330 IOHK
Bitcoin Q&A: Mixing services
 
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How do mixing services work? What are CoinJoin transactions? How much could they improve privacy or anonymity in Bitcoin? These questions are from the MOOC 9.4 session which took place on March 9th, 2018. 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: Worse Than Useless: Financial Surveillance - https://youtu.be/n4F-h4xuXMk Fungibility, privacy, anonymity - https://youtu.be/y3s8c7YDtXU Altcoins and specialisation - https://youtu.be/b_Yhr8h6xnA The price of losing privacy - https://youtu.be/2G8IgiLbT_4 The war on cash and crypto - https://youtu.be/BAlRKfvBnvw MimbleWimble and Schnorr signatures - https://youtu.be/qloq75ekxv0 Atomic swaps - https://youtu.be/fNFBA2UmUmg Decentralised exchanges with fiat - https://youtu.be/3Url8tbQEkA Decentralised exchanges and counterparty risk - https://youtu.be/hi_jaw0dT9M The Lightning Network - https://www.youtube.com/playlist?list=PLPQwGV1aLnTurL4wU_y3jOhBi9rrpsYyi How do I choose a wallet? - https://youtu.be/tN6b62sEpsY Hot vs. cold wallets - https://youtu.be/Aji_E9sw0AE Secure, tiered storage system - https://youtu.be/uYIVuZgN95M How do I secure my bitcoin? - https://youtu.be/vt-zXEsJ61U HODLing and the "get free" scheme - https://youtu.be/MhOwmsW1YNI How to get people to care about security - https://youtu.be/Ji1lS9NMz1E Airdrop coins and privacy implications - https://youtu.be/JHRnqJJ0rhc Bitcoin as everyday currency - https://youtu.be/xYvvSV4mjH0 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 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: 8721 aantonop
How Does Cardano Work?
 
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Cardano is a 3rd generation blockchain led by the co-founder of Ethereum, Charles Hoskinson and Jeremy Wood (ex-Ethereum). They've synthesized a lot of cool ideas from what they've learned in the space like delegated proof of stake consensus, smart contract functionality, KYC compliance, and a more suitable networking protocol than TCP/IP called RINA. I'll go into the technical details in this video and compare it to other alternatives. Code for this video: https://github.com/llSourcell/how_does_cardano_work Please hit the subscribe button if you liked this video! I will be pushing quality technical content every week and will get better and better at it. And like and comment. That's what keeps me going. Connect with me: https://twitter.com/sirajraval https://www.facebook.com/sirajology https://www.instagram.com/sirajraval/ More learning resources: https://www.cardanohub.org/en/the-daedalus-wallet/ https://blockonomi.com/cardano-guide/ https://coincodex.com/crypto/cardano/guides/ https://github.com/liuchengxu/blockchain-tutorial/tree/master/cardano https://ru-clip.com/video/teJkEpTax8U/how-to-buy-cardano-ada-cryptocurrency.html https://blog.coinswitch.co/how-to-buy-ada-cardano-from-coinswitch-667d8b37de0 https://www.ruclip.tk/video/4oKOl01ycOs/how-to-buy-cardano-ripple-altcoins-step-by-step-tutorial/ Signup for my newsletter for exciting updates in the field of AI: https://goo.gl/FZzJ5w
Views: 51901 Siraj Raval
Blockchain | Consensus Algorithms, Blockchain Technology and Bitcoin UCL by Andreas M. Ant
 
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An academic lecture by Andreas M. Antonopoulos explaining the consensus algorithm, Proof of Work, used by bitcoin and many other blockchains. This talk was presented in collaboration with. An academic lecture by Andreas M. Antonopoulos explaining the consensus algorithm, Proof of Work, used by bitcoin and many other blockchains. This talk . A collection of my talks on bitcoin.. This is the 2nd part of a presentation in collaboration with the Department of Computer Science, at University College London (UCL). Andreas is a UCL alumni. Part of an academic lecture that.
Views: 9 Spencer Macken
Vitalik Buterin's  Ethereum Project
 
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Vitalik Buterin is inventor and co-creator of Ethereum, described as a “decentralised mining network and software development platform rolled into one” that facilitates the creation of new cryptocurrencies and programs that share a single blockchain. Bitcoin guzzles about as much electricity annually as all of Nigeria. Ethereum gulps electrons too, as do most other cryptocurrencies. As bad as that sounds, though, there's reason to believe a solution may be at hand. Cryptocurrency miners do much more than unlock new coins. In the process, they check the blockchain to make sure people aren't spending coins fraudulently, and they add new lists of transactions — the blocks — to the chain. It's the second step, meant to secure the blockchain from attacks, that guzzles electricity. Eventually, all miners must transform each list of most recent transactions into a digital signature that can serve as proof that the information is true. The miners can do this, using a cryptographic tool that takes any input and spits out a string of seemingly random characters. But Bitcoin's creator, Satoshi Nakamoto, made this part particularly difficult. He set up a competition, the object of which is to be the first to determine a very specific signature based on three inputs: the signature of the preceding block, the list of new transactions, and a random third number. Since miners don't know the third number, they must generate digital signatures repeatedly until one guesses correctly. This expends an immense amount of energy, signaling to the rest of the network that a miner's accounting can be trusted. But while this particular method of reaching agreement — known as "proof of work" — is the most established, it isn't the only one. A growing number of technologists are exploring different avenues, and some smaller cryptocurrencies already employ alternative means. The one in the best position to supplant proof of work is called "proof of stake." Whereas proof of work rewards participants for spending computational resources, blockchains that use proof of stake would select validators based in part on the size of their respective monetary deposits — their stake. This would be massively more energy efficient, but the concept is still unproven at a large scale and has a number of kinks that need working out. Still, if all goes as planned, Ethereum will transition to proof of stake relatively soon, perhaps as early as the end of this year. That would be hugely impressive, given that its creator Vitalik Buterin has called devising an effective consensus algorithm "one of the hardest problems in cryptocurrency development." Vitalik Buterin was born in 1994 in Kolomna, Russia to Dmitry Buterin, a computer scientist and Maia Buterin, a business analyst. He lived in the area until the age of 6 when his parents migrated to Canada. Vitalik learned about Bitcoin from his father and in 2013, at the age of 19, he published a white paper proposing Ethereum. He attended the University of Waterloo but dropped out in 2014, when he received the Thiel Fellowship in the amount of $100,000, and went to work on Ethereum full-time. The Thiel Fellowship was created in 2010 by Peter Thiel, co-founder of Paypal and a member of the Steering Committee of the Bilderberg Group. It annually awards $100,000 to 20 people under the age of 20 in order to spur them to drop out of college and create their own ventures. About the Ethereum Project, Vitalik has said: "I am truly grateful to have the opportunity to work in such an interesting and interdisciplinary area of industry, where I have the chance to interact with cryptographers, mathematicians and economists prominent in their fields, to help build software and tools that already affect tens of thousands of people around the world, and to work on advanced problems in computer science, economics and philosophy every week." As a developer, Buterin has contributed to a number of other open source software projects like Kryptokit, Pybitcointools, Multisig.info, and Btckeysplit. He also contributed to DarkWallet by Cody Wilson, Bitcoin Python libraries, and the cryptocurrency marketplace site Egora. More information: In Change We Trust – Bitcoin & Blockchain https://youtu.be/l5sa-Wdvy9o Sources: Nathaniel Popper https://youtu.be/WfULutvxvzY Proof of Work vs Proof of Stake - Simplified Explanation https://youtu.be/SiKnWBPkQ4I Vitalik Buterin - The Mastermind Behind Ethereum https://youtu.be/KCQP02LHjGY Decentralizing Everything with Ethereum's Vitalik Buterin https://youtu.be/WSN5BaCzsbo Vitalik Buterin | The Advantages of Decentralization https://youtu.be/yO0fRwVxbSs Ethereum https://www.youtube.com/channel/UC6rYoXJ_3BbPyWx_GQDDRRQ Lecture 7: Ethereum & Smart Contracts: Enabling a Decentralized Future https://youtu.be/K3gG8MRYhyk Music: Nosaj Thing & Pretty Lights - Ethereal Santana - Dawn/ Go Within Visit: https://www.facebook.com/SpaceAndIntelligence
Bitcoin Q&A: Block capacity and embedded data
 
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How many transactions can fit in a block, with or without SegWit? What other types of data can you put in a block? What is metadata? What is OP_RETURN? What is OpenTimestamps and what are the use cases? More on OP_RETURN - https://en.bitcoin.it/wiki/OP_RETURN Check out OpenTimestamps here: https://opentimestamps.org/ These questions are from MOOC 9.6 and the June monthly Patreon sessions, which took place on March 23rd and June 24th 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: Immutability and Proof-of-Work: The Planetary Scale Digital Monument - https://youtu.be/rsLrJp6cLf4 What is Segregated Witness? - https://youtu.be/dtOjjB4mD8k SegWit and fork research - https://youtu.be/OorLoi01KEE The value of proof-of-work - https://youtu.be/ZDGliHwstM8 Scaling strategies and adoption - https://youtu.be/dML1a_Ek9Kw Impact of smart contracts on law & accounting - https://youtu.be/K-TRzuPwJCc Instrinsic vs. extrinsic assets - https://youtu.be/KDtfFNZy9xg MimbleWimble and Schnorr signatures - https://youtu.be/qloq75ekxv0 Empty blocks, orphan blocks, and valid chains - https://youtu.be/dizF2S63RXY Setting up secure storage devices - https://youtu.be/wZ9LxLLvfXc Multi-signature and distributed storage - https://youtu.be/cAP2u6w_1-k Cryptographic primitives - https://youtu.be/RIckQ6RBt5E Why Open Blockchains Matter - https://youtu.be/uZPIz3ArQww 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: 5471 aantonop
University Courses on Blockchain and Cryptocurrency
 
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I have just finished delivering a four day intensive certification course with the Blockchain Institute of Technology at the Faculty of Engineering at the University of Curaçao. This intensive in-person training covered key elements of blockchain technology and cryptocurrency, and was done in partnership with Blockchain Institute of Technology (https://blockchaininstitute.com), University of Curaçao (https://uoc.cw) and Zinica Group (https://Zinica.com) Sign up to receive George Levy's FREE email newsletter and a video email course on blockchain, Bitcoin and cryptocurrency ($47 Value yours free) at: https://GeorgeLevy.com/Free
Views: 492 George Levy
IOHK presents at Oxford University: Ouroboros: A Provably Secure Proof-of-Stake Blockchain Protocol
 
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On the Ouroboros Design: How rigour and engineering are essential for critical infrastructure, read the latest IOHK blog now: https://iohk.io/blog/on-the-ouroboros-design-how-rigour-and-engineering-are-essential-for-critical-infrastructure/ https://iohk.io/research/papers/a-provably-secure-proof-of-stake-blockchain-protocol/ Mathematicians with a curiosity about the algorithms behind blockchain came to hear Aggelos Kiayias speak at Oxford university’s Mathematical Institute on Wednesday. Professor Kiayias, Chief Scientist at IOHK, had been invited to the university to give a talk on his work on Ouroboros, a provably secure Proof-of-Stake algorithm for blockchain. It the first time such a cryptographic protocol has been devised and is significant because its use would enable blockchains to process many more transactions, giving the technology the muscle that would scale it up for far wider use than at present. “Bitcoin is slow,” he said in the presentation, in an outline of the problem. “The transactions per second of Visa are in the order of many thousands, for Paypal in the order of hundreds, and Bitcoin is far less than that – clearly that’s something that can’t scale to a global level.” In addition to the much greater efficiency of Ouroboros, Prof Kiayias explained a novel reward mechanism for incentivising the protocol and used game theory to show why attacks such as selfish mining and block withholding would be neutralised. A Nash equilibrium is a prescription of a strategy for each rational player, with the property that if other players follow it, it does not make sense for a rational player to deviate from it. Prof Kiayias described how Ouroboros can be proven to be an approximate Nash equilibrium, thus distinguishing this blockchain system from Bitcoin, which is known to be not incentive compatible. The Ouroboros paper was first published last December with Alexander Russel, Bernardo David and Roman Oliynykov and Prof Kiayias presented the work at the Alan Turing Institute in London last year. Bernardo David on PoS: https://www.youtube.com/watch?v=q5sCsPerCiQ Bernardo David presenting PoS in detail at IOHK's Tokyo tech lab: https://youtu.be/hMgxZOsTlQc Among the audience was Hayyu Imanda, whose desire to specialise in cryptography for her PhD studies brought her to hear the presentation. The 22-year-old is currently in a class of 26 students at Oxford university studying for an MSc in Mathematics and Foundations of Computer Science. “I come from a pure maths background and I find cryptography very interesting, in that it was relatively recently founded and there is so much research happening,” she says. “I see it as a bridge from pure maths into real life, with many uses in terms of security, and it’s going to be a growing field.” More images from the event here: https://iohk.io/blog/a-proof-of-stake-lecture-at-oxford-university/ -- https://iohk.io/team/aggelos-kiayias/ Prof Aggelos Kiayias is the Chair in Cyber Security and Privacy at the University of Edinburgh. His research interests are in computer security, information security, applied cryptography and foundations of cryptography with a particular emphasis in blockchain technologies and distributed systems, e-voting and secure multiparty protocols as well as privacy and identity management. He joins IOHK as chief scientist through a long-term consulting agreement between IOHK and the University of Edinburgh, UK, where he is based and continues to do research and teach courses in cyber security and cryptography. Prof Kiayias is also Professor in Residence (gratis) at the University of Connecticut, USA, and Associate Professor of Cryptography and Security (on leave) at the National and Kapodistrian University of Athens, Greece. Prof Kiayias’s cyber security research over the years has been funded by the Horizon 2020 programme (EU), the European Research Council (EU), the General Secretariat for Research and Technology (Greece), the National Science Foundation (USA), the Department of Homeland Security (USA), and the National Institute of Standards and Technology (USA). He has received an ERC Starting Grant, a Marie Curie fellowship, an NSF Career Award, and a Fulbright Fellowship. He holds a Ph.D. from the City University of New York and he is a graduate of the Department of Mathematics at the University of Athens. He has more than 100 publications in journals and conference proceedings in the area. He currently serves as the program chair of the Financial Cryptography and Data Security 2017 conference. -- Input Output See more at: https://iohk.io Get our latest news updates: https://iohk.io/blog/ Meet the team: https://iohk.io/team/ Learn about our projects: https://iohk.io/projects/cardano/ Read our papers: http://iohk.link/paper-ouroboros Visit our library: https://iohk.io/research/library/ In the press: https://iohk.io/press/ Work with us: https://iohk.io/careers/
Views: 80131 IOHK
Scottish Bitcoin Blockchain Meetup: Reflections on the Revolution & Security of Blockchain Protocols
 
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Scottish Bitcoin Blockchain Meetup featuring Aggelos Kiayias, Susan Ramonat, and Charles Hoskinson (One of the founders of Ethereum, former Ethereum CEO, Current CEO of IOHK) Charles Hoskinson - Chief Executive Officer IOHK & Co-Founder of Ethereum ICOs and Moral Hazards Blockchain: Reflections on the Revolution Susan Ramonat, CEO, Spiritus Partners Always driven to provide over the horizon leadership, Susan Ramonat brings over 25 years of executive experience on Wall Street and in banking. Susan established the Blockchain program strategy for a leading technology service provider to global wealth and investment managers. She speaks frequently about Blockchain, cybersecurity and operational resilience for audiences ranging from healthcare, financial services, and other critical infrastructure industries to academic researchers and government agencies in the US and UK. She also serves on the Industrial Advisory Board for Engineering Science at Loyola University Chicago. Susan is a magna cum laude graduate of Princeton University. Proving the Security of Blockchain Protocols : From proof of work to proof of stake Prof. Aggelos Kiayias Chair in Cyber Security and Privacy - Edinburgh Uni School of Informatics & Director of the newly established Blockchain Technology Laboratory in partnership with IOHK Ltd. Live Streamed on July 27 2017 Tips BTC: 12c6sJPHioCFu58DbMQJrqxc35JvErF7tz -~-~~-~~~-~~-~- Please watch: "Rand Paul's Speech on AUMF and 16 years of Unconstitutional Wars! 9/12/2017 " https://www.youtube.com/watch?v=MkH6KLBsjLA -~-~~-~~~-~~-~-
Views: 199 Roddy Piper
Zero Knowledge Proofs - Computerphile
 
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How do you prove something without giving away all your data? Zero Knowledge Proofs could hold the answer. Alberto Sonnino, Research Student at UCL explains. EXTRA BITS: https://youtu.be/RK_pNQ3QCKA Computing Limits: https://youtu.be/jv2H9fp9dT8 UCL Link: http://bit.ly/C_UCL-people https://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 111318 Computerphile
What is Delegated Proof of Stake (DPos)?
 
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Delegated Proof of Stake (#DP0S) is a decentralized consensus model with high transaction rate and low energy consumption. Subscribe for more: http://bit.ly/2EN5Ded You will get info on coins and explanation of tech behind it.
Views: 1594 ASAP crypto
Why It's Nearly Impossible To Counterfeit Bitcoin
 
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Even with thousands of fast computers, you’d have to match half the computing power of the entire network just to have a coin-flip’s chance of getting the solution first. So this mathematical race would pit a counterfeiter against the computing power of the whole network if they wanted to sneak an undetected self-made block into the block chain. It’s as close as you can get to mathematical certainty that such a counterfeit block would be detected and invalidated. Precisely because these math problems are so hard, their solutions in each block are proof to work, that the computing power of the entire network was brought to bear to solve them, and since solving them is hard but checking them is easy, you can easily confirm for yourself, using only your laptop, that every block in the chain is in the exact order it belongs. Check out our website for more information https://digitalassetuniversity.com

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