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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. Andreas is a UCL alum. This talk was presented in collaboration with the Department of Computer Science at University College London. 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: What is Consensus: Rules without Rulers - https://youtu.be/2tqo7PX5Pyc Bitcoin Security: Bubble Boy and the Sewer Rat - https://youtu.be/810aKcfM__Q Bitcoin, A New Species of Money: An Evolutionary Perspective on Currency - https://youtu.be/G-25w7Zh8zk Measuring Success: Price or Principle - https://youtu.be/mPMsbgWl9p4 Why Open Blockchains Matter - https://youtu.be/uZPIz3ArQww Decentralised Globalisation - https://youtu.be/QoiR4aNbTOw Investing in Education instead of Speculation - https://youtu.be/6uXAbJQoZlE Beyond Price: Bitcoin's Impact on the Future - https://youtu.be/rvwVbRQ5Ysc How does the Blockstream satellite work? - https://youtu.be/C1GxxlqRkKQ Regulation and the bank boycott - https://youtu.be/8ypH69Cb1l0 Remittances and smuggling in Venezuela - https://youtu.be/RRXecXfWARw Bitcoin as everyday currency - https://youtu.be/xYvvSV4mjH0 What is the appeal of sound money? - https://youtu.be/tfba4FFErrQ Hyperbitcoinization - https://youtu.be/AB5MU5fXKfo Why permissioned blockchains fail - https://youtu.be/GEQzlJ_WL-E Protocol development security - https://youtu.be/4fsL5XWsTJ4 How to avoid re-creating systems of control - https://youtu.be/EfoGnDoaBL8 Wallets, nodes, and monetary sovereignty - https://youtu.be/8Hb3tUn8s4E Is bitcoin testing governments? - https://youtu.be/UfRGo2LAIpo Will governments let privacy coins exist? - https://youtu.be/30sjEW70rLE Geopolitics and state-sponsored attacks - https://youtu.be/htxPRTJLK-k Governance and social attack immunity - https://youtu.be/PjOHatoX6Fk Sanctions and censorship resistance - https://youtu.be/DeXe5eGRl7E State-sponsored digital currencies and trust minimization - https://youtu.be/dSpFbg7jlDw Taxation and failed societies - https://youtu.be/xspdlOtBjcE 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. 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 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: 114084 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: 15784 aantonop
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
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: 3866 11FS
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: 2588 IOHK
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: 286 Roger Wilco Agency
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: 202935 Dapp University
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: 147 Colin McDonnell
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: 914 Ethereum Foundation
Learn Blockchain to future-proof your career!
 
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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: 1252 RMIT Online
Lecture 8.3 – Proof-of-useful-work [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: 60 Colin McDonnell
Facebook's First Blockchain Acquisition - Cryptocurrency Coming?
 
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► SUBSCRIBE TO THIS CHANNEL ◄ For more videos on blockchain technology: https://www.youtube.com/channel/UCY0xL8V6NzzFcwzHCgB8orQ?sub_confirmation=1 DOWNLOAD FREE VIDEO COURSES: http://www.dappuniversity.com/free-download Build Your First Blockchain App: http://www.dappuniversity.com/articles/blockchain-app-tutorial Article Credit: https://cheddar.com/media/facebook-blockchain-acquisition-chainspace Donate Ether to the channel: 0x39C7BC5496f4eaaa1fF75d88E079C22f0519E7b9 Website: http://dappuniversity.com/ Follow me on Twitter (@DappUniversity): https://twitter.com/DappUniversity Email me: [email protected]
Views: 1279 Dapp University
"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: 2457 Bitcoin TV
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: 359631 Computerphile
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: 113191 Computerphile
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: 1853 Goose-Tech
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: 28904 aantonop
Understanding Consensus Algorithms, Blockchain Technology,  plus Bitcoin UCL
 
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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. 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: 18 Chuck Crypto
Andreas M. Antonopoulos: Consensus Algorithms, Blockchain Technology and Bitcoin [UCL]
 
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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 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.
Views: 34 Cathern Miers
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: 17461 IOHK
Prof Aggelos Kiayias | Proving the security of blockchain protocols.
 
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Prof Aggelos Kiayias at Shanghai Jiao Tong University | Proving the security of blockchain protocols. A video presentation with Prof Aggelos Kiayias at Shanghai Jiao Tong University & Winter School on Cryptocurrency and Blockchain Technologies, Filmed on location in Shanghai January 15th - 17th 2017. 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. https://iohk.io/team/aggelos-kiayias/ Cryptocurrencies like Bitcoin have proven to be a phenomenal success. The underlying blockchain techniques hold a huge promise to change the future of financial transactions, and even our way of computation and collaboration. Both development community and research community have recently made significant progresses. But at the same time, we are facing many challenges. This winter school aims to bring together the communities working on cryptocurrency and blockchain technologies. The target audience is anyone (students, researchers, developers, professionals) with an interest in cryptography and security. The lectures in the school will be given by world leading researchers in this area (such as Professors Jonathan Katz and Aggelos Kiayias - IOHK). All lectures will be self-contained, and we don’t assume the participants to have cryptography background. In this winter school, we will study a comprehensive set of topics about blockchain technologies, including: Bitcoin basics; Analysis of Nakamoto consensus in cryptographic setting and in game-theoretical setting; Ethereum and smart contracts; Alternative approaches to mining and consensus; Scalability; Anonymity. Input Output Founded in 2015 by Charles Hoskinson and Jeremy Wood, 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. Cascading disruption It is the founding principle of IOHK. Cascading disruption is the idea that most of the structures that form the world’s financial, governance and social systems are inherently unstable and thus minor perturbations can cause a ripple effect that fundamentally reconfigures the entire system. Our company is committed to identifying and developing technology to force these perturbations in order to push towards a more fair and transparent order. Projects we work on Currently IOHK is studying new tools and paradigms for cryptographic research and the architecture of cryptocurrencies. More specifically, we are collaboratively developing an open-source library for universal composability and the Scorex project. We also do for-profit work aligned with our mission, vision and goals. The mission of IOHK We view the world as a series of giant and mostly interconnected social graphs with hundreds of complex systems embedded. Our mission is to perturb the graphs to a more connected, transparent and fair configuration for both the flow of ideas and value. 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: 1310 IOHK
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: 3020 Bitcoinboy
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
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 Hit the Join button above to sign up to become a member of my channel for access to exclusive content!
Views: 52604 Siraj Raval
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: 81878 IOHK
Proof of Bitcoin Ownership
 
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How the blockchain gives you everything you need to validate ownership of your own assets. Check out our website for more information https://digitalassetuniversity.com
Proof of work Versus a Proof of stack
 
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Proof of work Versus a Proof of stack explained
Views: 44 Cryptal News
Cryptocurrency: Proof of Work vs. Consensus
 
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* Keep your cryptocurrency safe on a Ledger Nano X: https://bit.ly/2VU4HO0 or Nano S: https://bit.ly/2TTt7oW * I have a Twitter account at: https://twitter.com/XRPnewschannel which is used in case Youtube decides to delete this channel unexpectedly. Please follow me on Twitter if you'd like to stay in touch in case that takes place. It has happened to other XRP Youtubers in the past. The Twitter account is simply used as a backup; I only engage in XRP discussion on Youtube. * The information and analysis provided on XRP News is for entertainment purposes only. When deciding to invest in any digital asset or cryptocurrency, a professional financial advisor should be consulted. No decision should be made without a professional analysis of your personal financial situation, risk tolerance, etc. I am not a financial advisor, and the information here should not be taken as financial advice. Your investment decisions are yours and yours alone. The information covered on this channel is true to the best of my knowledge, but I, like anyone, can be fooled. Do your own thorough research before making any financial decisions. Recent Topical Videos: ----------------------------- Ripple Leadership ----------------------------- Brad Garlinghouse and the Peanut Butter Manifesto: https://youtu.be/KmFC4G3DAfU The Adaptability of Ripple: https://youtu.be/Xm-fB5G0R1E Chris Larsen and the Internet of Value: https://youtu.be/YnwyMHkc5Ms All or Nothing: https://youtu.be/OzP_7BBfDag Liquidity Begets Liquidity: https://youtu.be/QvYWOlH1yWc Brad Garlinghouse Predicts Crypto Custody: https://youtu.be/aU-WX9fp08w Garlinghouse Ain't Worried (Security Debate): https://youtu.be/JttNlgtDJtY Brad’s Comments on xRapid Use: https://youtu.be/i8EPtFkyyjM ------------------------------------- Ripple and XRP History ------------------------------------- The Winkening: https://youtu.be/WTve4pOLHsw The Evolution of FUD: https://youtu.be/98LVzUtBso0 A Disappointing Year for Ripple? https://youtu.be/B2dFZ3o5e6Q --------------------------------------------------- XRP and Cryptocurrency Basics --------------------------------------------------- Proof-of-Work vs. Consensus: https://youtu.be/doYNEl05CKI Jevons Paradox and David Schwartz: https://youtu.be/2Wa_vSy7u3A Public Keys, Private Keys, and Crypto Storage: https://youtu.be/LaG5y1pXjVs Weitse Wind and the XRP Tip Bot: https://youtu.be/OOwvGBbaxk0 Measuring xRapid: https://youtu.be/JXZ-7xjLEL8 Galgitron and a Monkey on an Elevator: https://youtu.be/UYopO_06rok MUFG Coin and Walled Gardens: https://youtu.be/HMKnbkAUv6A Ripple’s XRP Incentives: https://youtu.be/Q8DJBnfA-GU XRP and Virtual Gaming: https://youtu.be/qDTi-vBJCv8 University Blockchain Research Initiative: https://youtu.be/-peCbS11EEU Coil and Incentivizing a Better Internet: https://youtu.be/7XudV1TVMN4 SWIFT Vulnerabilities: https://youtu.be/81QxaDzx3p8 ---------------------- XRP Opinions ---------------------- Groupthink: https://youtu.be/Q5SO9oonnZc Marketcap Calculations: https://youtu.be/6xR9Cq2Fnww Will XRP Become THE Tip Coin? https://youtu.be/l2rv8oBD1uY You Can Thank Warren Davidson: https://youtu.be/z96xubd6T5c Investment Theory / Diversification: https://youtu.be/KRSlcDuwfrQ When xPool? https://youtu.be/o0exrg1CJy4 Changes Coming to Marketcaps and Metrics? https://youtu.be/aBocsh7r83c Crypto Addiction Case Study - C3Nik: https://youtu.be/9AFTWpjCm-A --------- Price --------- Crypto is Dead: https://youtu.be/9luek99NarM Some Thoughts on the Price of XRP: https://youtu.be/uIKhdN_RdWw Where’s the Bottom? https://youtu.be/Mc8jHjLJbXw XRP’s Reaction to Legitimate News: https://youtu.be/MrrSWTnaRgc You Only Buy Once: https://youtu.be/pFqPx6cdgys Instamoon Possibility? https://youtu.be/IIYt4u1lvzA ----------------------------------------- Bearableguy and Insiders ----------------------------------------- Bearableguy and the Phenomenon of Failed Predictions: https://youtu.be/kLpUjbJsVa8 Bearableguy Nonsense: https://youtu.be/TZNhsH7SORY Bearable is Back: https://youtu.be/lxqSTY4Isy0 ------------------------------------ Other Crypto Opinions ------------------------------------ One More Reason Why Bitcoin Won't Die: https://youtu.be/JAAxBEnX2sM Would a Bitcoin 51% Attack Crash the Market? https://youtu.be/AL1n9-7eufA A Proposal for the Correct Pronunciation of HODL: https://youtu.be/rGkoKlqGsIw Crypto Tribalism and Mutual Interests: https://youtu.be/Ieslw1GdcvA ----------------- Donations ----------------- If you would like to support the channel through an XRP donation, please use the following address: Address: rKfzfrk1RsUxWmHimWyNwk8AoWHoFneu4m Destination Tag: 1571993159 Make sure to use the destination tag or your donation will be lost. All support is greatly appreciated. Thanks!
Views: 74 XRP News
Proof of Work versus Proof of Stake w. professor Claudio Orlandi
 
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Associate Professor Claudio Orlandi is the Scientific Advisor for Cryptographic Protocol Design at the CONCORDIUM BLOCKCHAIN RESEARCH CENTER at Aarhus University Professor Claudio Orlandi holds a PhD in Computer Science from Aarhus University and heads our cryptographic protocol team. He is the author of more than 30 scientific publications in cryptography and security, and a leading researcher on secure multiparty computation and zero-knowledge protocols. He has managed a number of national and international research projects, and has served as chair of CryptoAction, a European network for research in cryptography (2014- 2018). Claudio Orlandi has received a prestigious Danish DFF Starting Grant (2016) and an ERC Starting Grant (2018). He has also worked as a postdoctoral fellow at Bar-Ilan University, Israel. About Concordium Foundation: The Concordium Network is a proof-of-stake-based blockchain network that will be designed from the ground up to deliver a trustworthy and solid foundation for business. It will feature a protocol-layer ID/KYC mechanism that ensures that every user on the network is identified, and that every transaction involves provenance tracking. These features do not prevent the provision of privacy (based on zero-knowledge proofs), but they provide an environment that we believe will be acceptable to regulators, to public institutions, to financial institutions and to “big business,” while solving a number of key issues in blockchain-based transaction logging such as avoiding single points of failure and providing finality in transactions. With this initiative, the Concordium Foundation intends to address and improve various technical aspects of existing blockchains, but most importantly, it aims to provide a blockchain network that delivers a regulatable and compliant transaction logging, transaction settlement and transaction finalization environment while enabling a wide range of powerful and legitimate business applications through use of flexible smart contracts. Concordium website: https://www.concordium.com/ Concordium Blockchain research Center website: http://cs.au.dk/research/centers/concordium Concordium on LinkedIn: https://www.linkedin.com/company/concordium Concordium on Facebook: https://www.facebook.com/TheConcordiumFoundation/ Concordium on Twitter: https://twitter.com/ConcordiumNet
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: 3772 Louis Thomas
🎓 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!
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: 2474212 3Blue1Brown
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: 24 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: 1187104 TEDx Talks
Toward More Secure Proof-of-Work Consensus Protocols - SBC '19
 
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Toward More Secure Proof-of-Work Consensus Protocols - Ren Zhang Stanford Blockchain Conference (SBC) '19, January 30th - February 1st 2019, Stanford University Slides and a full listing of talks are available at https://cyber.stanford.edu/sbc19 Stanford Cyber Initiative and Stanford Center for Blockchain Research
Views: 216 Cyber Initiative
USENIX Security '17 - REM: Resource-Efficient Mining for Blockchains
 
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Fan Zhang, Ittay Eyal, and Robert Escriva, Cornell University; Ari Juels, Cornell Tech; Robbert van Renesse, Cornell University Blockchains show promise as potential infrastructure for financial transaction systems. The security of blockchains today, however, relies critically on Proof-of- Work (PoW), which forces participants to waste computational resources. We present REM (Resource-Efficient Mining), a new blockchain mining framework that uses trusted hardware (Intel SGX). REM achieves security guarantees similar to PoW, but leverages the partially decentralized trust model inherent in SGX to achieve a fraction of the waste of PoW. Its key idea, Proof-of-Useful-Work (PoUW), involves miners providing trustworthy reporting on CPU cycles they devote to inherently useful workloads. REM flexibly allows any entity to create a useful workload. REM ensures the trustworthiness of these workloads by means of a novel scheme of hierarchical attestations that may be of independent interest. To address the risk of compromised SGX CPUs, we develop a statistics-based formal security framework, also relevant to other trusted-hardware-based approaches such as Intel’s Proof of Elapsed Time (PoET). We show through economic analysis that REM achieves less waste than PoET and variant schemes. We implement REM and, as an example application, swap it into the consensus layer of Bitcoin core. The result is the first full implementation of an SGX-based blockchain. We experiment with four example applications as useful workloads for our implementation of REM, and report a computational overhead of 5—15%. View the full program: https://www.usenix.org/sec17/program
Views: 490 USENIX
XRP News: Brad at DC Blockchain Summit, Market Less Coupled to BTC?, UBRI Kansas and UT, Poker HODL
 
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* Keep your cryptocurrency safe on a Ledger Nano X: https://bit.ly/2VU4HO0 or Nano S: https://bit.ly/2TTt7oW * If you'd like to follow me on Twitter, my account can be found at: https://twitter.com/XRPnewschannel. * The information and analysis provided on XRP News is for entertainment purposes only. When deciding to invest in any digital asset or cryptocurrency, a professional financial advisor should be consulted. No decision should be made without a professional analysis of your personal financial situation, risk tolerance, etc. I am not a financial advisor, and the information here should not be taken as financial advice. Your investment decisions are yours and yours alone. The information covered on this channel is true to the best of my knowledge, but I, like anyone, can be fooled. Do your own thorough research before making any financial decisions. Recent Topical Videos: ----------------------------- Ripple Leadership ----------------------------- Brad Garlinghouse and the Peanut Butter Manifesto: https://youtu.be/KmFC4G3DAfU The Adaptability of Ripple: https://youtu.be/Xm-fB5G0R1E Chris Larsen and the Internet of Value: https://youtu.be/YnwyMHkc5Ms All or Nothing: https://youtu.be/OzP_7BBfDag Liquidity Begets Liquidity: https://youtu.be/QvYWOlH1yWc Brad Garlinghouse Predicts Crypto Custody: https://youtu.be/aU-WX9fp08w Garlinghouse Ain't Worried (Security Debate): https://youtu.be/JttNlgtDJtY Brad’s Comments on xRapid Use: https://youtu.be/i8EPtFkyyjM ------------------------------------- Ripple and XRP History ------------------------------------- The Winkening: https://youtu.be/WTve4pOLHsw The Evolution of FUD: https://youtu.be/98LVzUtBso0 A Disappointing Year for Ripple? https://youtu.be/B2dFZ3o5e6Q --------------------------------------------------- XRP and Cryptocurrency Basics --------------------------------------------------- Proof-of-Work vs. Consensus: https://youtu.be/doYNEl05CKI Jevons Paradox and David Schwartz: https://youtu.be/2Wa_vSy7u3A Public Keys, Private Keys, and Crypto Storage: https://youtu.be/LaG5y1pXjVs Weitse Wind and the XRP Tip Bot: https://youtu.be/OOwvGBbaxk0 Measuring xRapid: https://youtu.be/JXZ-7xjLEL8 Galgitron and a Monkey on an Elevator: https://youtu.be/UYopO_06rok MUFG Coin and Walled Gardens: https://youtu.be/HMKnbkAUv6A Ripple’s XRP Incentives: https://youtu.be/Q8DJBnfA-GU XRP and Virtual Gaming: https://youtu.be/qDTi-vBJCv8 University Blockchain Research Initiative: https://youtu.be/-peCbS11EEU Coil and Incentivizing a Better Internet: https://youtu.be/7XudV1TVMN4 SWIFT Vulnerabilities: https://youtu.be/81QxaDzx3p8 ---------------------- XRP Opinions ---------------------- Bob Way is the New David Schwartz: https://youtu.be/M3wIo1idxqM Earn Interest on Your XRP: https://youtu.be/qQbaibLPPVw The Significance of XRP on Coinbase: https://youtu.be/5gMJdgUkQLU Groupthink: https://youtu.be/Q5SO9oonnZc Marketcap Calculations: https://youtu.be/6xR9Cq2Fnww Will XRP Become THE Tip Coin? https://youtu.be/l2rv8oBD1uY You Can Thank Warren Davidson: https://youtu.be/z96xubd6T5c Investment Theory / Diversification: https://youtu.be/KRSlcDuwfrQ When xPool? https://youtu.be/o0exrg1CJy4 Changes Coming to Marketcaps and Metrics? https://youtu.be/aBocsh7r83c Crypto Addiction Case Study - C3Nik: https://youtu.be/9AFTWpjCm-A --------- Price --------- Crypto is Dead: https://youtu.be/9luek99NarM Some Thoughts on the Price of XRP: https://youtu.be/uIKhdN_RdWw Where’s the Bottom? https://youtu.be/Mc8jHjLJbXw XRP’s Reaction to Legitimate News: https://youtu.be/MrrSWTnaRgc You Only Buy Once: https://youtu.be/pFqPx6cdgys Instamoon Possibility? https://youtu.be/IIYt4u1lvzA ----------------------------------------- Bearableguy and Insiders ----------------------------------------- Bearableguy and the Phenomenon of Failed Predictions: https://youtu.be/kLpUjbJsVa8 Bearableguy Nonsense: https://youtu.be/TZNhsH7SORY Bearable is Back: https://youtu.be/lxqSTY4Isy0 ------------------------------------ Other Crypto Opinions ------------------------------------ One More Reason Why Bitcoin Won't Die: https://youtu.be/JAAxBEnX2sM Would a Bitcoin 51% Attack Crash the Market? https://youtu.be/AL1n9-7eufA A Proposal for the Correct Pronunciation of HODL: https://youtu.be/rGkoKlqGsIw Crypto Tribalism and Mutual Interests: https://youtu.be/Ieslw1GdcvA ----------------- Donations ----------------- If you would like to support the channel through an XRP donation, please use the following address: Address: rKfzfrk1RsUxWmHimWyNwk8AoWHoFneu4m Destination Tag: 1571993159 Make sure to use the destination tag or your donation will be lost. All support is greatly appreciated. Thanks!
Views: 2940 XRP News
Hashing, Encryption, Blockchain & Bitcoin Mining with Python
 
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This video illustrates the concepts of Hashing, Encryption, Blockchain and Bitcoin Mining by the use of straightforward Python code. It is from a free Webinar by The Python Quants. Check out our Python for Finance Online Training Classes, including the first University Certificate in Python for Finance. http://training.tpq.io
Views: 12168 Yves Hilpisch
Christian Badertscher | Ouroboros Genesis, CCS in Toronto 2018.
 
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A third major paper from the Ouroboros line of research was presented at a leading computer security and cryptography event, a recognition of the contribution the work makes to the field of computer science. https://iohk.io/blog/ouroboros-genesis-presented-at-flagship-conference/ The paper, Ouroboros Genesis, was presented by researcher Christian Badertscher at the 25th ACM Conference on Computer and Communications Security, held in Toronto this week. The conference is five days of presentations, workshops and tutorials for hundreds of delegates, who are information security researchers, industry professionals, and developers from around the world. The annual event, organised by the Special Interest Group on Security, Audit and Control (SIGSAC) of the Association for Computing Machinery (ACM), is a forum for delegates to come together for discussions and to explore cutting edge research. This year CCS sponsors included the US government agency, the National Science Foundation, and major global technology companies such as Baidu, Cisco, Samsung, Google, Facebook. The hardware wallet maker, Ledger, was also present. CCS is the highest rated computer security and cryptography conference according to Google Scholar ratings, meaning that collectively, the papers selected to appear at the conference are more cited by academics than papers for any other conference. IOHK’s paper appeared in one of the two sessions that were dedicated to blockchain, with a total of six papers on the subject overall. These included a paper on what will happen with blockchains such as Bitcoin as rewards get smaller and the potential problems that stem from that. Scalability was in focus too, with a paper on scaling blockchains through sharding and another on state channel networks. Since Bitcoin demonstrated the disadvantages of using an energy-intensive proof-of-work protocol to run a public distributed ledger, many researchers have turned to explore proof of stake. The Ouroboros research is an attempt to systematically surmount the challenges that proof of stake poses and describe a secure, efficient and sustainable protocol for blockchains. This effort has been led by Professor Aggelos Kiayias, IOHK Chief Scientist and Chair in Cybersecurity and Privacy at the University of Edinburgh’s School of Informatics. In the space of only a couple of years, the team have made significant advances. Ouroboros was the first peer reviewed, provably secure proof-of-stake protocol, and it is already running in the real world, underpinning Cardano, a top 10 global cryptocurrency. Ouroboros Genesis is the third paper in the Ouroboros family of proof-of-stake protocols, and the third paper from this important line of IOHK research to be heard at a flagship international computer science conference. The first paper, Ouroboros, was presented at Crypto 2017 in California, and the second, Ouroboros Praos, was at Eurocrypt 2018 in Tel Aviv. Further papers are to come from the research team, including on sharding, a means to provide scalability for Cardano. Using Ouroboros Genesis, new users joining the blockchain will be able to do so securely based only on an authentic copy of the genesis block, without the need to rely on a checkpoint provided by a trusted party. Though common in proof-of-work protocols like Bitcoin, this feature was previously unavailable in existing proof-of-stake systems. This means that Ouroboros can now match the security guarantees of proof-of-work protocols like Bitcoin in a way that was previously widely believed to be impossible. -- 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/ Visit our library: https://iohk.io/research/library/ In the press: https://iohk.io/press/ Work with us: https://iohk.io/careers/
Views: 2894 IOHK
Cryptocurrencies and Beyond - Aggelos Kiayias, Chief scientist IOHK.
 
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Secure Decentralized Blockchains without Proofs of Work By Aggelos Kiayias, Chief scientist IOHK. A Provably Secure Proof-of-Stake Blockchain Protocol https://eprint.iacr.org/2016/889.pdf Contribute to pos-haskell-prototype development by creating an account on GitHub. https://github.com/input-output-hk/pos-haskell-prototype “Cryptocurrencies” refer to techniques for purely digital currencies. The most famous of these is Bitcoin, but since its creation numerous other currencies have also been created, relying on the underlying Distributed Ledger Technology to create a publicly verifiable list of transactions: the blockchain. There is considerable interest from the data science community, the financial sector and government in other applications of this technology, and other instantiations of cryptocurrencies that may offer different levels of anonymity, untraceability and verifiability. In this talk IOHK's chief scientist Aggelos Kiayias presents “Secure Decentralized Blockchains without Proofs of Work”. At the Alan Turning Institute in London. This event was recorded 1 November 2016 at the ATI: https://www.turing.ac.uk/events/cryptocurrencies-and-beyond/ Professor Aggelos Kiayias profile: https://iohk.io/blog/professor-aggelos-kiayias-joins-iohk-as-chief-scientist/ Professor Aggelos Kiayias is 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. His research has been funded by the Horizon 2020 programme (EU), the European Research Council (EU), the Secretariat of 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 Mathematics department of the University of Athens. He has over 100 publications in journals and conference proceedings in the area. He currently serves as the program chair of the Financial Cryptography and Data Security conference. The Home of Aggelos Kiayias: http://www.kiayias.com/Aggelos_Kiayias/Home_of_Aggelos_Kiayias.html Research papers: http://dblp.uni-trier.de/pers/hd/k/Kiayias:Aggelos Teaching: http://www.kiayias.com/Aggelos_Kiayias/Introduction_to_Modern_Cryptography.html Projects: - https://iohk.io/research/library/#9BKRHCSI - https://panoramix-project.eu/ - http://gow.epsrc.ac.uk/NGBOViewGrant.aspx?GrantRef=EP/N028198/1 iohk.io Translated by Attain Corporation 翻訳 株式会社アテインコーポレーション http://attaincorp.co.jp/
Views: 3998 IOHK
Bitcoin Q&A: Miners, pools, and consensus
 
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How many miners and/or pools are there? Can the distribution of miners be determined? Would mining pools be incentivised to merge? Is miner collusion through 51% attacks a present threat? Could they double-spend their coins? How are they impacted by replace-by-fee (RBF)? These questions are from the MOOC sessions 7.2, 8.2, and 9.2 covering the Byzantine Generals' Problem, which took place on February 26th 2017, September 15th 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 What is mining? - https://youtu.be/t4p4iMqmxbQ 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 Could a state-sponsored 51% attack work? - https://youtu.be/KUd8ZGgm6Qo Honest nodes and consensus - https://youtu.be/KAhY2ymI-tg 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 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: 10234 aantonop
What is blockchain || How blockchain works || Mechanism of Blockchain explained in hindi
 
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blockchain originally called as block chain and it’s the continuously growing list of transaction connected in blocks un the distributed ledger or open ledger. the mechanism of blockchain has been explained in details in simplified manner in this video blockchain tutorial blog:. http://gyanshares.com/blockchain-the-mechanism-underlying-bitcoin-transaction/
Views: 1635 Gyan Share
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
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: 340 Branded Gentleman
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: 8483 IOHK
Ripple Expands Blockchain University Initiative With Partners in US, China & Singapore.
 
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Thank you for watching our channel. you can read this Article by following this link: https://bit.ly/2ULLf4z You can buy all the coins from Coinspot at this link: https://bit.ly/2SlpNTd Coinbase: https://bit.ly/2ABbALl Bitcoin (BTC) is known as the first open-source, peer-to-peer, digital cryptocurrency that was developed and released by a group of unknown independent programmers named Satoshi Nakamoto in 2008. Cryptocoin doesn’t have any centralized server used for its issuing, transactions and storing, as it uses a distributed network public database technology named blockchain, which requires an electronic signature and is supported by a proof-of-work protocol to provide the security and legitimacy of money transactions. The issuing of Bitcoin is done by users with mining capabilities and is limited to 21 million coins. Currently, Bitcoin’s market cap surpasses $138 billion and this is the most popular kind of digital currency. Buying and selling cryptocurrency is available through special Bitcoin exchange platforms or ATMs. DISCLAIMER: - ALL OF THE INFORMATION ON OUR CHANNEL IS A PERSONAL AND SHARED - CRYPTOCURRENCY IS VIRAL INVESTMENT, ONLY INVESTMENT MONEY THAT YOU CAN AFFORD TO LOSE. - ALWAYS INVESTIGATED AND CLEARLY UNDERSTAND WHEN INVALIDING THE INVESTMENT DECISION. - WE DO NOT HAVE ANY FINANCIAL ADVICE AND WILL NOT BE LIABLE FOR ANY OF YOUR LOST. Bitcoin Channel does not endorse and is not responsible for or liable for any content, accuracy, quality, advertising, products or other materials on this Channel. Viewers should do their own research before taking any actions. The Bitcoin Channel is not responsible, directly or indirectly, for any damage or loss caused or alleged to be caused by or in connection with the use of or reliance on any content, goods or services mentioned in the videos and included links of the article that related.
Views: 2 Private Channel
La Blockchain en détail (Benoît Lafontaine - Yann Rouillard)
 
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C'est la techno "hype" du moment. Celle qui aurait le pouvoir de changer le monde comme le Web l'a fait ces dernières décennies. Mais, finalement, sur qu'est-ce que la Blockchain ? Comment ça marche ? que pouvons-nous faire avec ? Cette session University va nous permettre de voir en détail ce qui se cache réellement derrière le Buzz. Nous reviendrons sur le fonctionnement technique de Bitcoin, première implémentation de la Blockchain, pour ensuite décortiquer les nouvelles possibilités offertes par les plateformes comme Ethereum. Dans une seconde partie, nous détaillerons des exemples de code afin de comprendre précisément ce qu'est un smart-contract. Dans une troisième partie, nous nous intéresserons aux différents cas d'usages qui sont à l'étude où déjà implémentés et nous parlerons des enjeux sociaux que la Blockchain introduit. Cette session laissera une place importante aux discussions car le sujet soulève bien souvent de nombreuses questions. A la fin de cette session, vous pourrez répondre aux questions comme : * Différence entre Proof-Of-Work et Proof-Of-Stake ? * Qu'est-ce qu'une DAO ? * Comment coder sur la Blockchain ? * Pourquoi s'intéresser à la Blockchain ?
Views: 38649 Devoxx FR
November 30th Bitcoin, Blockchain and Cryptocurrency News  Recap
 
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November 30th Bitcoin, Blockchain and Cryptocurrency News Recap [VIDEO] - https://bitcoinexchangeguide.com/november-30th-bitcoin-blockchain-and-cryptocurrency-news-recap-video Ripple's UBRI Partnership with University of Texas at Austin Has Been a Huge Blockchain Success https://bitcoinexchangeguide.com/ripples-ubri-partnership-with-university-of-texas-at-austin-has-been-a-huge-blockchain-success/ Chinese Crypto Miner Huaren Capital to Launch a Digital Peso for Remittances in the Philippines https://bitcoinexchangeguide.com/chinese-crypto-miner-huaren-capital-to-launch-a-digital-peso-for-remittances-in-the-philippines/ UBS Exec Paul Donovan Blasts Bitcoin, Affirms "Cryptos Are Fatally Flawed" https://bitcoinexchangeguide.com/ubs-exec-paul-donovan-blasts-bitcoin-affirms-cryptos-are-fatally-flawed/ Blockchain Cuties Teams Up with TRON to Deliver New Content and Crypto Collectible Gameplay https://bitcoinexchangeguide.com/blockchain-cuties-teams-up-with-tron-to-deliver-new-content-and-crypto-collectible-gameplay/ Bitcoin T-Shirt Makes the Boat with Will Smith's Hydro Surfing Youtube Video with Liza Koshy https://bitcoinexchangeguide.com/bitcoin-t-shirt-makes-the-boat-with-will-smiths-hydro-surfing-youtube-video-with-liza-koshy/ Satoshi Nakamoto's P2P Foundation Profile Becomes Active for the First Time Since 2009 "Nour" https://bitcoinexchangeguide.com/satoshi-nakamotos-p2p-foundation-profile-becomes-active-for-the-first-time-since-2009-nour/ CEO of Xunlei Technology: Here's How Blockchain Can Grow Without Cryptocurrencies https://bitcoinexchangeguide.com/ceo-of-xunlei-technology-heres-how-blockchain-can-grow-without-cryptocurrencies/ Bitcoin Jesus Believes Crypto is in Direct Competition with Fiat and the Issuance of Money Supply https://bitcoinexchangeguide.com/bitcoin-jesus-believes-crypto-is-in-direct-competition-with-fiat-and-the-issuance-of-money-supply/ Microsoft Japan and LayerX Startup Collaborate to Improve Speed of Blockchain Adoption https://bitcoinexchangeguide.com/microsoft-japan-and-layerx-startup-collaborate-to-improve-speed-of-blockchain-adoption/ University of Basel Awards Ethereum's Vitalik Buterin with Honorary Doctorate https://bitcoinexchangeguide.com/university-of-basel-awards-ethereums-vitalik-buterin-with-honorary-doctorate/ OceanEx 1.0 (Beta) Goes On Live with 'Early Voyagers Plan' Launching https://bitcoinexchangeguide.com/oceanex-1-0-beta-goes-on-live-with-early-voyagers-plan-launching/ BANKEX, Devexperts Partnership to Reduce Frequency of Crypto Asset Liquidity Issues https://bitcoinexchangeguide.com/bankex-devexperts-partnership-to-reduce-frequency-of-crypto-asset-liquidity-issues/ Humans vs Crypto Trading Bots: Are They Important in Trading Cryptocurrencies? https://bitcoinexchangeguide.com/humans-vs-crypto-trading-bots-are-they-important-in-trading-cryptocurrencies/ How Using Solar Power Energy Can Help Make Crypto Mining Ecofriendly https://bitcoinexchangeguide.com/how-using-solar-power-energy-can-help-make-crypto-mining-ecofriendly/ BSO and Kaiko Partner to Deliver on Real-Time Cryptocurrency Market Data for Clients https://bitcoinexchangeguide.com/bso-and-kaiko-partner-to-deliver-on-real-time-cryptocurrency-market-data-for-clients/ Sirin Labs' $999 FINNEY Blockchain Phone Ready for Pre-Order via SRN Crypto Tokens https://bitcoinexchangeguide.com/sirin-labs-999-finney-blockchain-phone-ready-for-pre-order-via-srn-crypto-tokens/ Manila Residents Get Paid in Ethereum for Helping Polluted Philippines Ocean Locations https://bitcoinexchangeguide.com/manila-residents-get-paid-in-ethereum-for-helping-polluted-philippines-ocean-locations/ Binance Info Adds New Cryptocurrencies (Zcoin, Nano, Verge) to its Gold Label Projects https://bitcoinexchangeguide.com/binance-info-adds-new-cryptocurrencies-zcoin-nano-verge-to-its-gold-label-projects/ Check Point Software Detects 'KingMiner' Crypojacking Malware is Evolving Amongst Crypto Mining Bots https://bitcoinexchangeguide.com/check-point-software-detects-kingminer-crypojacking-malware-is-evolving-amongst-crypto-mining-bots/ BlockShow Asia 2018 Event Concludes with Optimistic Bitcoin Future Despite Current Crypto Winter https://bitcoinexchangeguide.com/blockshow-asia-2018-event-concludes-with-optimistic-bitcoin-future-despite-current-crypto-winter/
Bitcoin Q&A: The mining process
 
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Can you provide a brief overview of the mining process? Is there human intervention in mining or is it automated? What influenced the centralisation of mining and how will it decentralise again? More on mining and consensus in 'Mastering Bitcoin' - https://github.com/bitcoinbook/bitcoinbook/blob/f8b883dcd4e3d1b9adf40fed59b7e898fbd9241f/ch10.asciidoc These questions are from the MOOC 9.2, 9.3, and 9.5 sessions, which took place on February 23rd, March 2nd, and March 16th 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 Miners, pools, and consensus - https://youtu.be/JHz7LM4ncLw 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/)
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5 Tips I Wish I Knew Before Learning Blockchain Programming
 
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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: 4154 Dapp University