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Search results “Blockchain proof of stake”
Proof-of-Stake (vs proof-of-work)
 
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Cryptocurrencies use a ton of electricity because of mining. In recent years people started working on a different technique called Proof-of-Stake. Not only does it use less energy, it can also be more secure. (This video is a re-upload to fix a mistake I made in the previous one. Sorry about that!) 📚 Sources for this video: https://www.savjee.be/videos/simply-explained/proof-of-stake/ 🌍 Social Twitter: https://twitter.com/savjee Facebook: https://www.facebook.com/savjee ✏️ Check out my blog https://www.savjee.be
Proof of Work VS Proof of Stake - Simplified Explanation
 
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Hello Cadets! We're bringing you a video all about proof of work vs. proof of stake. We tried our best to simplify these concepts but they're really deep and complicated, so let us know how we did. We also tried our best to be as accurate as possible, but if we missed something, please let us know. Proof Of Stake NOTES: CORRECTION: Your stake percentage to win signing a block is actually dependent on how much you own in a stake pool, so you would obviously be competing against many other stake holders, not just four. Tweet to us! https://twitter.com/cryptonautsshow Get Access to our Private Telegram https://www.patreon.com/cryptonauts Subscribe to our Youtube https://www.youtube.com/cryptonauts Follow our Steemit blog https://steemit.com/@cryptonauts Vector graphics by Freepik
Views: 96929 Cryptonauts
Proof of Work vs Proof of Stake (Ethereum) - Explained for Beginners
 
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We are explaining the difference between proof of work (used in Bitcoin, Ethereum, etc) and proof of stake. Ethereum will be switching from proof of work to proof of stake in the next month, so you should be aware of the differences between the two. Learn more about proof of work and proof of stake: https://youtu.be/ASCGQFZgcT8 Subscribe to the channel for more videos! New videos every week!
Vitalik Buterin interview on Proof of Stake and future of ethereum
 
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Vitalik Buterin interview on Proof of Stake and future of ethereum. Vitalik Buterin explains the working, proof of stake concept and other things about the future of ethereum in this interview with CIGI Senior Fellow Julie Maupin. Their discussion covers a wide range of subjects: Buterin’s introduction to cryptocurrencies; the creation of Ethereum; how hardware — big and small — plays a role in future development and adoption; and Ethereum’s imminent transition from the “proof of work” model to “proof of stake.” Vitalik Buterin also explains the fail safe or the penalty feature of casper and removes the notion that the proof of stake is being called centralized
Views: 9867 AGRIM JAIN
What is Proof of Work / Proof of Stake
 
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This short video explains the concepts of Proof of Work (POW) and Proof of Stake (POS) in the Bitcoin terminology. for more information visit http://99bitcoins.com
Views: 95349 Ofir Beigel
Porgrammer explains PoW vs PoS | Blockchain
 
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What is the difference between proof of work and proof of stake?
Views: 28948 Ivan on Tech
Bitcoin Q&A: Proof-of-Work (PoW), Proof-of-Stake (PoS), Delegated Proof-of-Stake (DPoS)
 
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What is the difference between proof-of-work (PoW), proof-of-stake (PoS), and delegated proof-of-stake (DPoS)? This is part of a talk which took place on July 7th 2017 at a Bloktex event hosted by the Wisma BeeOn Group in Kuala Lumpur, Malaysia: https://antonopoulos.com/event/the-future-of-money-kuala-lumpur-malaysia/ RELATED: Immutability and Proof-of-Work: The Planetary Scale Digital Monument - https://youtu.be/rsLrJp6cLf4 What happens to transaction fees when the block reward is zero? - https://youtu.be/FffX32ENGKc Decentralized power, leaderless governance - https://youtu.be/E5VbDlQTPzU The new experimental science of consensus algorithms - https://youtu.be/6N5XlU7Iajk Could a state-sponsored 51% attack work? - https://youtu.be/KUd8ZGgm6Qo What is the role of nodes? - https://youtu.be/fNk7nYxTOyQ 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 well-respected figures in bitcoin. Follow on Twitter: @aantonop https://twitter.com/aantonop Website: https://antonopoulos.com/ He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters. THE INTERNET OF MONEY, v1: https://www.amazon.co.uk/Internet-Money-collection-Andreas-Antonopoulos/dp/1537000454/ref=asap_bc?ie=UTF8 MASTERING BITCOIN: https://www.amazon.co.uk/Mastering-Bitcoin-Unlocking-Digital-Cryptocurrencies/dp/1449374042 [NEW] MASTERING BITCOIN, 2nd Edition: https://www.amazon.com/Mastering-Bitcoin-Programming-Open-Blockchain/dp/1491954388 Subscribe to the channel to learn more about Bitcoin & open blockchains! If you want early-access to talks and a chance to participate in a monthly LIVE Q&A with Andreas, become a patron: https://www.patreon.com/aantonop Music: "Unbounded" by Orfan (https://www.facebook.com/Orfan/) Outro Graphics: Phneep (http://www.phneep.com/) Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)
Views: 26907 aantonop
Bitcoin 101: Pros and Cons of Proof of Stake
 
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Thinking about purchasing a Ledger Nano Hardware Wallet? Browse their official website: https://www.ledgerwallet.com/r/67ef Want to join coinbase to begin your crypto journey? Here’s a link to get free $10: https://www.coinbase.com/join/558828dc34383271a500003b Step up your game and Check Out Binance too: https://www.binance.com/?ref=10080191 Join the Robinhood app and invite your friends to Robinhood and win free stock. Here's my invite: http://share.robinhood.com/heidic1 Find me on Steemit: www.steemit.com/@heiditravels Twitter: @blockchainchick Instagram: @hheidiann If you’re looking for an app that tracks the price of BTC & ETH and many other coins, check out the CoinView App: https://play.google.com/store/apps/details?id=br.com.freeflowt.coinview LINKS FOR ADDITIONAL READING FOR THIS VIDEO & ALL INFO IN TEXT DOWN BELOW 2014 List of different POS coins and their staking percentages/payout periods: https://bitcointalk.org/index.php?topic=458726.0 More recent list of POS coins: https://steemit.com/cryptocurrency/@andrebarn/list-of-pos-proof-of-stake-coins Article by Vitalik on POS systems: https://bitcoinmagazine.com/articles/what-proof-of-stake-is-and-why-it-matters-1377531463/ Potential downside of POS: https://cointelegraph.com/news/the-inevitable-failure-of-proof-of-stake-blockchains-and-why-a-new-algorithm-is-needed The concept of Proof of Stake mining is similar to Proof of Work mining in that the miners are still needed to unlock or create new blocks that contain new coins, which they are then rewarded. Basically, the way that Proof of Stake works, and what gives it its name, is the miners are required to hold a certain amount of the coin in their wallet, or stake, in order to qualify to mine for new blocks. These qualified miners are then randomly selected to be able to mine the next new block and receive the new coins that are in it. Contrast this with how Proof of Work miners are all competing to unlock the next new block, using lots of energy to do so, and it’s easy to see how Proof of Stake is more efficient. Similar to Proof of Work and how different networks use different hash algorithms, the staking rewards and staking mechanisms differ for Proof of Stake networks as well. We have yet to achieve perfection in this world of cryptocurrencies. There will always be pros and cons to each system. The problem with Proof of Work is ash it takes a lot of computing power, and therefore a lot of energy to run the network and maintain the blockchain. In fact, it is this requirement for this large amount of computer power that acts as the security measure against any one entity being able to control the network (51% attacks)  This was especially true before things like mining pools were created. But that’s something to be saved for another post. There are many pros and cons for Proof of Work, but for the purposes of this video, here are a few: Pros: * More decentralized network * More secure network Cons: * Requires large amounts of energy * Wasted computing power Proof of Stake is at least a more energy efficient way to essentially accomplish the same goals. However, there are a few hang ups for this system as well. Proof of Stake limits who is able to help secure the network by requiring miners to hold a certain amount of its coins in their wallet. Some Proof of Stake coins have been pre-mined, and some have even been “significantly pre-mined" meaning the individuals who created the coin were able to mine coins before going public. This can very easily result in whales, or individuals who hold large amounts of a coin, who then qualify to run a large number of staking nodes. A network that is already less decentralized thanks to this minimum coin requirement, could end up with a few wealthy individuals who would ultimately be able to control the network by running a majority of the staking nodes. Pros: * More energy efficient * Better rewards for staking your coins Cons: * Less decentralized network * less secure network Proof of Stake is an advancement of the idea behind Proof of Work, and with it often comes other mechanisms that work to provide other services that enhance how the network runs. These are called Masternodes and if done correctly, they can be a way to earn a passive income. I’ll be covering masternodes and how to find affordable options in my next video so if this is something you’re interested in learning more about be sure to subscribe to this channel and hit that bell icon to get notified when that video is released.
Views: 3620 Crypto Tips
Blockchain Proof of Stake -darmowa kryptowaluta!!!
 
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Prezentuję platformę na której możemy zarabiać kryptowalutę bez własnego wkładu finansowego. Zarabiamy słuchając muzyki na platformie blockchain Bitrad. Zarobioną monetę Bro możemy wymieniać na Bitcoin za pośrednictwem giełd takich jak Cryptopia czy Nova Exchange. Możemy również zainwestować w Master Node i zarabiać jeszcze więcej. Tylko darmowa kryptowaluta BITRAD - https://goo.gl/VEeD8P SPECYFIKACJA PROJEKTU - https://goo.gl/gW4rao KRYPTOWALOUTA BRO - https://goo.gl/5UW8Sh NOVA EXCHANGE - https://goo.gl/tbYJR9 CRYPTOPIA - https://goo.gl/z5s9A3 MASTER NODE - https://goo.gl/k8X3Bd WSPARCIE KANAŁU 35y2oAUYaYGxrJLaDQe8u1zbgkARZ2Xq6D
Views: 988 Kryptoholik
Blockchain Consensus with Proof of Stake
 
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A talk on how proof of stake works in achieving consensus on the blockchain with examples at the Wellington blockchain meet up.
Views: 2970 Sean Au
Proof of Stake (Ethereum) Explained
 
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http://boxmining.com/ethereum-proof-of-stake/ - Ethereum is set to undergo a Hard fork to implement Proof of Stake mechanism for all transactions. Here is a short summary of what this entails.
Views: 60161 Boxmining
Implementing Proof-of-Work in Javascript (Blockchain, part 2)
 
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Adding the proof-of-work mechanism to our homemade Javascript blockchain. Proof-of-work will secure our blockchain against spammers and people trying to tamper with our blocks. ► Source code Available on GitHub: https://github.com/SavjeeTutorials/SavjeeCoin ►►► Buying Bitcoin or Ethereum Get $10 for free when buying through my affiliate link (thanks!): https://goo.gl/G9NQsu ► About me 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be ✉️ Subscribe to newsletter: https://goo.gl/nueDfz 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
Proof-of-Stake and the Next Generation of Ethereum - Blockchain Academy (David Yakira)
 
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A session Orbs' Head of Research, David Yakira, gave at the Blockchain Academy in Tel Aviv on proof of stake, covering an overview of the method, a case study with PPCoin, the first project to try PoS and Ethereum's Casper FFG.
Views: 230 Orbs
Bitcoin - Proof of Stake Virtual Mining
 
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Proof of Stake Virtual Mining - Bitcoin and Cryptocurrency Technologies Part 8 - Alternative Mining Puzzles Not everyone is happy about how Bitcoin mining works: its energy consumption and the fact that it requires specialized hardware are major sticking points. This week we'll look at how mining can be re-designed in alternative cryptocurrencies.
Views: 30484 intrigano
[Lecture 7] Cryptoeconomics and Proof-of-Stake
 
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Blockchain Fundamentals Lecture 7 - Aparna Krishnan
Phore Blockchain | Proof of Stake & Masternode
 
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Phore Shared Masternode's are available here: https://simplepospool.com/?ref=CryptoTube PHORE LINKS: https://phore.io/ https://medium.com/@phoreblockchain/phore-blockchain-second-quarter-2018-development-recap-d41fe08b437c https://phore.io/phore-blockchain-and-reddcoin-announce-partnership-with-phore-marketplace/ https://medium.com/@phoreblockchain/unifox-and-phore-blockchain-announce-partnership-to-bring-phore-to-atms-pos-terminals-and-online-4c3d30276ae5
Views: 332 CryptoTube
Blockchain 101 Ep 56 - What is Proof of Stake PoS Consensus Mechanism?
 
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Proof of Stake consensus mechanism, Also known as POS, is similar to depositing your money in a bank where interest is given based on the amount and duration held. For cryptocurrencies that utilize Proof of Stake, the network will allocate tokens based on coin age, which is the quantity and duration of the cryptocurrency held. If you hold 100 tokens for a total of 30 days, your coin age at that point would be 3000. PoS has 2 advantages over Proof of Work. Firstly, PoS is far more energy efficient as it does not rely on competing with computing power. Secondly, PoS is less susceptible to a 51% Attack. An attacker needs to hold 51% of tokens, which is not worthwhile as it hurts his own financial interests. Currently, many cryptocurrencies utilize proof of work to issue new tokens and proof of stake to maintain the security of the network. Huobi Global Exchange: https://www.huobi.com Follow us on: Blog: https://blog.huobi.com/ Facebook: https://www.facebook.com/huobiglobalofficial Instagram: https://www.instagram.com/huobiglobalofficial Medium: https://medium.com/@huobiglobal Telegram: https://t.me/huobiglobalofficial Twitter: https://twitter.com/HuobiGlobal Youtube: https://www.youtube.com/HuobiGlobal
Views: 239 Huobi Global
Proof of Work & Proof of Stake Explained | School of Blockchain
 
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Follow me on Instagram: @schoolofblockchain Todays class is about the difference between Proof of Work and Proof of Stake. Proof of stake (PoS) is a type of algorithm by which a cryptocurrency blockchain network aims to achieve distributed consensus. In PoS-based cryptocurrencies, such as Peercoin[1] invented by Sunny King and Scott Nadal, the creator of the next block is chosen via various combinations of random selection and wealth or age (i.e., the stake). In contrast, the algorithm of proof-of-work-based cryptocurrencies such as bitcoin uses mining; that is, the solving of computationally intensive puzzles to validate transactions and create new blocks. Proof of work describes a system that requires a not-insignificant but feasible amount of effort in order to deter frivolous or malicious uses of computing power, such as sending spam emails or launching denial of service attacks. The concept was adapted to money by Hal Finney in 2004 through the idea of "reusable proof of work." Following its introduction in 2009, bitcoin became the first widely adopted application of Finney's idea (Finney was also the recipient of the first bitcoin transaction). Proof of work forms the basis of many other cryptocurrencies as well.
Programmer explains Ethereum Casper PoS | Future of Ethereum
 
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What is Casper proof-of-stake algorithm and what effects will it have on the Ethereum blockchain? Programmer explains. Video where Vitalik talks about 1000 ether, unfortunately it's in Russian. https://www.youtube.com/watch?v=eqv2CxuW-Do
Views: 47152 Ivan on Tech
Proof of Work vs Proof of Stake - Clearly Explained
 
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Proof of Work vs Proof of Stake - Clearly Explained In this video I explain the difference between the Proof of Work & Proof of Stake consensus mechanisms used by blockchain based cryptocurrencies. ⌨️ STEEMIT: https://steemit.com/@nuggetsnews 🎵Podcast: https://goo.gl/2FwLYz OR Search 'Nugget's News' 🏦Large Crypto Purchases/Sales: https://calebandbrown.com/ Discount code: Nugget's News 👕 Crypto Merchandise: http://shrsl.com/nf7o ⚡️ Pay Bills with Crypto: https://www.livingroomofsatoshi.com/?code=C3FW 💰 Buy Gold and Silver with Crypto - https://www.ainsliebullion.com.au/ Discount code - NUGGET 📚 REDDIT: https://www.reddit.com/user/nugget_alex/ 🏦 Coinbase: https://www.coinbase.com/join/54152b230bf6fa71dd000002 🏦 Coinspot: https://www.coinspot.com.au?affiliate=YNV53 🏦 Binance: https://www.binance.com/?ref=10788816 🏦 KuCoin: https://www.kucoin.com/#/?r=188MQ 🏦 EthFinex: https://www.ethfinex.com/?refcode=FJfGA79ciH 🔐 LEDGER Wallet: https://www.ledgerwallet.com/r/f536 🔐 TREZOR Wallet: https://shop.trezor.io?a=esyfabvzr6zu 💻 Public FB Page: https://www.facebook.com/nuggetsnews/ 🎓 Join Crypto Academy: https://goo.gl/uLvyWn 🎓 Crypto Trading Course: Discount code: Nugget10 https://www.chartguys.com/courses/crypto/?ref=5
Views: 16559 Nugget's News
EB58 – Vitalik Buterin: Ethereum, Proof-of-Stake, The Future Of Bitcoin
 
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Support the show, consider donating: 3PCV8LKfA9952FTF9Y4wGTUmYikEgHws34 (http://bit.ly/1AHdNNW) At just 20-years young, Vitalik Buterin is one of the most brilliant minds in the cryptocurrency space. Previously, a co-founder of Bitcoin Magazine, he has conceptualized Ethereum, the most radical and ambitious cryptocurrency project since Bitcoin. After raising $18m in a crowdsale, a team of over 30 are working on launching the project by March 2015. In his work on designing a system for the future, he has been grappling with many of the hardest problems in the cryptocurrency space over the past year. In a fascinating discussion, we covered: - How Ethereum has evolved since the white paper - The problems of Proof-of-Work - Why Proof-of-Stake is the future of consensus protocols - Why his main focus has been on consensus issues and scalability - Why Bitcoin will never be stable enough to price things in - The flawed ideology of ‘Bitcoin maximalism’ that prevents people from considering Proof-of-Work alternatives Links mentioned in this episode: - Ethereum: http://ethereum.org - How to get started: Your first DApp in under one hour: https://forum.ethereum.org/discussion/1402/how-to-get-started-your-first-dapp-under-one-hour - Ethereum Proof-of-Concept 7: https://github.com/ethereum/cpp-ethereum/wiki - Proof of Stake: How I Learned to Love Weak Subjectivity: https://blog.ethereum.org/2014/11/25/proof-stake-learned-love-weak-subjectivity/ - Slasher: A Punitive Proof-of-Stake Algorithm: https://blog.ethereum.org/2014/01/15/slasher-a-punitive-proof-of-stake-algorithm/ Sponsors: - Gems: http://getgems.org - Shapeshift: https://shapeshift.io - Fairlay: http://fairlay.com Show notes: http://epicenterbitcoin.com/podcast/058 SoundCloud: http://soundcloud.com/epicenterbitcoin/eb-058 Epicenter Bitcoin is hosted by Brian Fabian Crain & Sébastien Couture. - Visit our website: http://epicenterbitcoin.com - Subscribe to our newsletter: http://epicenterbitcoin.com/newsletter - Twitter: http://twitter.com/epicenterbtc
Views: 41360 Epicenter
Ethereum's Proof of Stake Casper Explanation part 1
 
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Ethereum is planning on making a huge move to Proof of Stake. Here is an explanation of how Casper, Ethereum's Proof of Stake algorithm, works with validators. Part 2 explains how the rules of Etheruem's Proof of Stake will be enforced, and the implementations on Ethereum's future: https://youtu.be/j5rVmy_JM3Q If you have any questions please comment below! If you want to learn more (references): -Vitalik Buterin recent post about Casper and Proof of Stake: https://medium.com/@VitalikButerin/mi... - Great Article giving an update of Ethereum's Proof of Stake progress (also has links to Caper White Papers): https://www.coindesk.com/ethereum-seeing-ghosts-vitalik-buterin-is-finally-formalizing-ethereums-casper-upgrade/ Great Overview about Proof of Stake, Ethereum mining, and Ethereum's Future: https://www.ethnews.com/proof-of-stak... Ivan's technical explanation of Casper, Ethereum's Proof of Stake: ( Ivan is coding Casper and knows it best) https://youtu.be/MyDocEQfBGA
Views: 14478 Delvewise
How to start Proof of Stake Mining - a cryptocurrency guide to what's needed! And the setup I use!
 
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Tutorial episode on whats needed will cover: What hardware you need What I currently use And a high level tutorial on staking your wallet. So lets start profiting! If you like this video please donate so I can create more! BTC: 1PsUfNNfmrM8z3ZJSAmq6ZWxsxy57GLzE7 LTC: LWJSzDEdtYtj4yfPDbrhLf5MrSjsbwzo13 ETH and ERC20 tokens: 0xe2327426dF56b4D5528e99A037efcA2c3686Eab9 Decred: DshU5PWhRZwmnP1RSsucdnDKTGsyY8sctWJ
Views: 17805 Alpha Crypto
Blockchain 101 Ep 57 - What is Delegated Proof of Stake?
 
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Delegated Proof of Stake, Known as (DPOS), is similar to voting for board of directors. Token holders vote for a fixed number of nodes which represent them in verifying and updating the ledger. To encourage greater participation in these elections, the network generates a small amount of tokens as rewards. Bitshares, PPCoin and other cryptocurrencies utilize this consensus model. DPOS is rather similar to a parliament system If delegates fail to carry out the responsibilities given to them, such as, failing to update the ledger during their turn, they could be removed and the network would elect new delegates as replacement. In DPOS, every single client can decide which node to trust. Compared to POW, DPoS has greatly increased Blockchain’s data processing capability, allowing transactions to be completed within seconds and minimizing the cost of network security maintenance, allowing cryptocurrency transaction speeds to be similar to centralized settlement systems such as Visa. Huobi Global Exchange: https://www.huobi.com Follow us on: Blog: https://blog.huobi.com/ Facebook: https://www.facebook.com/huobiglobalofficial Instagram: https://www.instagram.com/huobiglobalofficial Medium: https://medium.com/@huobiglobal Telegram: https://t.me/huobiglobalofficial Twitter: https://twitter.com/HuobiGlobal Youtube: https://www.youtube.com/HuobiGlobal
Views: 234 Huobi Global
Modified Proof of Stake Blockchain Implementation
 
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https://github.com/folkpark/blockchain
Views: 66 Parker Folkman
Bitshares Security: Delegated Proof of Stake
 
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We explore the security model of the Bitshares blockchain, known as Delegated Proof of Stake. A direct comparison to Bitcoin's security model highlights some key features that set Bitshares apart as a next-generation cryptocurrency.
Views: 2081 Chronos Crypto
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: 15549 IOHK
Ethereum Blockchain "Proof of stake" systems explained. 2018
 
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FACEBOOK--https://www.facebook.com/bitcoinmillionaire2018/ WEBSITE--https://boostyourtestoster.wixsite.com/website-1 #cryptonews #bitcoin #newmoney @bitcoin_millionaire2018_ hope you enjoy !! get bitcoin here https://www.coinbase.com/join/5a61d68849642d02198d15f0
Views: 35 Project TaraHash
Proof of Work vs Proof of Stake - [ Explained Simple ]
 
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Proof of Work (PoW) was created almost two decades ago in late 1990s, by Markus Jakobsson and Ari Juels. The main goal of PoW is to deter denial-of-service attacks by requiring computational work to be done before block submission. This means that, in order to mine a Bitcoin block, you have to spend computational power witch cost electricity. Proof of Stake (PoS) is another consensus structure, like PoW, but instead of requiring work or computational power, it requires the miner to hold a large amount of the cryptocurrency ================================================= 💰Get a Coinbase Wallet! - https://www.coinbase.com/join/5a4bf25... Sign up! 💰Get a Binance Wallet! - https://www.binance.com/?ref=21867060 Sign up! =================================================== ★ Any donation is highly appreciated. 🔑 BTC Wallet Address: 16EtKHG2rwH2NqA4MniK4JRhzPyv5AeiER 🔑 ETH Wallet Address: 0x1db0fa9a379e46cb205a39a0766e30d3e3d0d11e 🔑 LTC Wallet Address: LRcmBavhskBURqmw1sujV5LS8WUPvfaNj8 =================================================== ➤How to Invest In Crypto: https://www.youtube.com/watch?v=M4Nlj-y9utI ➤Top Richest in Crypto: https://www.youtube.com/watch?v=Q2kT6ypgoVY ➤Cool Facts About Bitcoin: https://www.youtube.com/watch?v=iOPn4f6OeyY ==================================================== Thank you so much for watching! ==================================================== Proof of Work vs Proof of Stake | Proof of Work | Proof of Stake | Bitcoin | Neo | Ethereum | cryptocurrency consensus | blockchain technology
Views: 2650 Aimstone
A $3.3 Billion Claim: Has Cardano's Blockchain 'Solved' Proof-of-Stake?
 
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A $3.3 Billion Claim: Has Cardano's Blockchain 'Solved' Proof-of-Stake? "Proof-of-stake is solved." Even in an industry that's seen no shortage of grand proclamations, those words, issued by entrepreneur Charles Hoskinson in April, grabbed attention. The CEO of blockchain firm IOHK (and one-time CEO of Ethereum), Hoskinson was seeking to send a message about a new resea... ► SUBSCRIBE FOR MORE VIDEOS: https://goo.gl/NYaHq2 ► Bitcoin News -Alt Coin news - coin telegraph - coindesk - coin market cap https://goo.gl/45UVFu ★★★ Thanks for watching! Please leave a like if you enjoyed and tell me what you think in the comments! Thanks ★★★
Views: 146 CoinKorea
Online-курс по Blockchain. Лекция 17. Proof-of-stake алгоритмы консенсуса
 
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В этой лекции рассмотрено что такое proof-of-stake и чем он отличается от proof-of-work. Особенности работы первой реализации PoS в Peercoin. В чем состоит идея delegated proof-of-stake и как он работает и какие его преимущества Наш блог на Medium Русская версия первой статьи: https://goo.gl/2eYwrc Английская версия: https://goo.gl/VVSQgx Все презентации: https://tinyurl.com/ydapr237 Ссылка на все лекции: https://goo.gl/3A7F7o ------------------------------------------------------------------------ Присоединяйтесь к Telegram каналу курса: https://t.me/blockchaincourse И Telagram чату: https://t.me/joinchat/BcQPDhGCPNGnhn0C2QXVRg
Views: 1909 Distributed Lab
VeriCoin's Proof of Stake-Time Blockchain White-paper Explained
 
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Full Video Description Below Our Videos are Best Viewed in 720p HD Please LIKE, SUBSCRIBE and SHARE. Thank you! *PoST WhitePaper: http://www.VeriCoin.info/downloads/VeriCoinPoSTWhitePaper10May2015.pdf Initially launched on May 10th, 2014, as of May 10th, 2015, VeriCoin is a Proof of Stake-Time Digital Currency that features VeriBit, VeriSend and a variable interest rate which fluctuates depending on the amount of total coins being staked as well as how long they've been staking. With one second transactions, sixty second confirmations, a multitude of features such as VeriBit, VeriSend, a BIP32 Lite Android Wallet and a very user friendly Desktop Wallet, VeriCoin is a much quicker, more intuitive, more efficient Peer to Peer Digital Currency than any traditional banking system or even Crypto Currency in existence - including Bitcoin. Developed by two Bio-Physicists and a Computer scientist from Rutgers University the Team has also obtained additional expertise in Steve Woods - a top tier C++ developer. The end goal remains the same - to simplify otherwise complicated technology and to foster unique partnerships who have the expertise to bring VeriCoin mainstream. *VeriCoin has weathered the initial Crypto Currency market volatility and crossed our two year anniversary on May 10th, 2016. Proof of Stake-Time: With two years under it's belt VeriCoin is now running on it's own, first of it's kind Proof of Stake protocol called Proof of Stake-Time, also known as PoST. PoST is now mature. VeriBit: VeriBit makes it possible to spend VeriCoin wherever BitCoin is accepted. Besides BitCoin itself, VeriCoin is the most spendable Digital Currency on the market. VeriSend: VeriSend is an optional privacy service which masks transaction data from prying eyes. It utilizes ring nodes, random transaction send amounts, and various other techniques to hide the send/receive connection from the world. Network Stake Dependent Disinflation Targeted Interest Proof of Stake-Time is a Blockchain protocol that features a variable interest rate which fluctuates depending on the amount of coins being staked as well as how long they've been staking. As more coins are staked users earn interest relative to the network stake weight, as well as how actively they've been staking their coins. This provides tremendous incentive to actively stake which, in turn, makes the network more secure. Our unique PoST protocol makes VeriCoin the most secure Proof-of-Stake Crypto Currency there is. *Auxiliary merged mining between the currency (VeriCoin) and the commodity (Verium) up next. VeriCoin Website: http://VeriCoin.info VeriCoin RocketChat: https://VeriCoin.rocket.chat VeriCoin Forums: https://VeriCoinForums.com Verium Reserve Twitter: https://Twitter.com/VeriumReserve VeriCoin Twitter: https://Twitter.com/VeriCoin VeriCoin Google+: https://Plus.Google.com/+VeriCoinChannel VeriCoin Facebook: https://Facebook.com/VeriCoin VeriCoin DailyMotion: http://DailyMotion.com/VeriCoin VeriCoin YouTube: https://YouTube.com/user/VeriCoinChannel
Views: 741 VeriCoin
Blockchain là gì? Proof of work, Proof of stake là gì? |-blockdev-|
 
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Một số khái niệm cơ bản về blockchain. Proof of work và Proof of stake: https://youtu.be/g5a1g_a58A4?t=950
Views: 3145 block dev
Nxt Blockchain: first Proof-of-stake Model with more than 5 years of proven stability
 
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Nxt is a blockchain technology available for public and private use, with a five-year development history, proven stability, a massive community, and a well-established proof-of-stake model. https://twitter.com/NxtCommunity Nxt is developed by Jelurida. If you are looking for a robust and secure blockchain technology for your business, contact us! info@jelurida.com ===================================================== What is Jelurida? Jelurida is a blockchain software company that enables enterprises to build decentralized applications utilizing the Nxt and Ardor technologies. We offer scalable proof-of-stake blockchain solutions, with a unique parent-child chain architecture, built on top of five years of software development and production blockchain experience. https://twitter.com/Jelurida https://www.jelurida.com ==================================================== What is Ardor Blockchain as a Service? Ardor is a scalable multichain platform based on a Blockchain-as-a-service model and designed for broad business adoption. The parent-child chain architecture allows companies to build their products and services using child chains while relying on the infrastructure of nodes and security provided by the Ardor parent chain. What is an Ignis Child Chain? Ignis, the public Ardor Child Chain, allows businesses to issue a token on the Ardor Platform which provides you with a node infrastructure already in place and ready to use. Ignis is built upon on a five-year development history and a well-established Proof-of-stake model. ======================================================   Community:    http://www.ardornxt.group/ News: https://www.nxter.org/   Slack: https://nxtplatform.org/slack/   Forum: https://nxtforum.org   Wiki: https://nxtwiki.org   Follow us on Twitter: https://twitter.com/Jelurida https://twitter.com/ArdorPlatform https://twitter.com/NxtCommunity   Join our Telegram Channels: General: https://t.me/nxt_ardor_ignis_news Jelurida Official: https://t.me/jelurida_official Nxt: https://t.me/nxt_official Ardor: https://t.me/ardor_official Ignis: https://t.me/ignis_official   And our Telegram Groups: Nxt Community: https://t.me/NxtCommunity Ardor Community: https://t.me/ArdorPlatform ====================================================== Creative Commons Attribution License This license lets others distribute, remix, tweak, and build upon your work, even commercially, as long as they credit you for the original creation. https://creativecommons.org/licenses/by/4.0/legalcode Website: https://www.ardorplatform.org Whitepaper: https://www.jelurida.com/sites/default/files/JeluridaWhitepaper.pdf Block explorer:     https://www.ardor.world/en/ RSS news: https://www.nxter.org/feed Twitter: https://twitter.com/ArdorPlatform Reddit: https://www.reddit.com/r/Ardor Medium: https://medium.com/@lyaffe Slack: https://nxtplatform.org/slack Youtube: https://www.youtube.com/channel/UCYY_S0X_PokzgVzkGd5Jezg Linkedin: https://www.linkedin.com/company/ardor-platform Bitcointalk: https://bitcointalk.org/index.php?topic=1518497.0 Facebook: https://www.facebook.com/ardorplatform Github: https://bitbucket.org/Jelurida
Proof-of-Work (PoW) vs. Proof-of-Stake (PoS)
 
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Proof of work vs proof of stake explained! Here's a simplified explanation on how a PoW blockchain differs from PoS, and how it applies to Bitcoin. 4. The Byzantine Generals’ Problem Before I begin discussing proof-of-work, it’s important for you to be aware of the Byzantine Generals’ Problem, also known as the Byzantine Fault Tolerance. 3. Proof-of-work Proof-of-work is a computational protocol miners use to validate transactions in a cryptocurrency network & add the transaction to the blockchain. Put simply, miners use their computers to churn through a ton of different guesses until the computer comes up with the right answer that fits within the network’s required parameters. Different cryptocurrencies use different mathematical formulas (or functions), all of which are based on extremely complex cryptography. A hash is a certain piece of information, ranging from a letter or number to even an entire word or text file. A hash function is a cryptography-based math equation where you input a hash value into the equation then get an encrypted string of numbers & letters as a result (the hash). Let me help you visualize it to make it easier. We’ll represent our hash function as h(x) = y, where h is the mathematical equation (aka the “hash function”), x is a dynamically-changing hash value, and y is the encrypted output (or hash). In the case of Bitcoin, the hash function that’s used is known as SHA-256 (which is an acronym for Secure Hash Algorithm, which uses a 256-bit hash). The hash value that you input can be as many different numbers & letters as you’d like, but the output will always be a string of 64 letters or numbers. The reason why this is so secure is because SHA-256 is a one-way formula, meaning it’s impossible to reverse engineer your output to find out what the original hash value was. So proof-of-work is essentially just that: you have a given hash function you’re required to use along with a 64-digit answer; and as a miner, you set your computer to “work” by plugging in a bunch of different hash values in an attempt to guess the right answer. Once you do so, you’re able to validate a transaction, add it to a block, and get rewarded for your efforts in the form of Bitcoin, which are released as block rewards. Think of mining as simply a race to guess the right answer. The miner who gets the right answer first gets the reward. 2. Proof-of-Stake The proof-of-stake protocol differs from proof-of-work in the sense that mining power is determined by the number of coins you hold of that particular cryptocurrency; the more coins you hold, the more mining power you have. Mining power with proof-of-work, on the other hand, is determined by how powerful your computer is & how much available electricity you have at your disposal that you can direct towards mining. In proof-of stake, holding ownership of the coins demonstrates your “stake” in the network. Methods have been implemented to grant smaller miners a chance to mint the next block, such as randomized block selection & coin age based selection. There’s also the option of running a masternode, which I discussed in my previous video on hard forks. One of the advantages of the proof-of-stake protocol is that it solves the Tragedy of Commons issue, which states that eventually, at some point in time, once all 21,000,000 Bitcoin have been rewarded & are in circulation, Bitcoin miners will be less motivated to mine in the Bitcoin network since there will no longer be any block rewards at that point, and the only way they’ll only be able to earn Bitcoin is from transaction fees. Less miners means more opportunity for an attack on the network, since it’ll be easier to control 51% of the network’s computational power. Proof-of-stake solves that by putting your own coins & investment at stake. 1. Which is better? Both protocols have their own advantages & disadvantages. Proof-of-work allows for not just miners, but also developers & the coin’s community members to vote on potential changes to be implemented into the network. But on the flipside, proof-of-work requires exorbitant amounts of electricity to run mining rigs. As of 2017, the Bitcoin mining network used more electricity in a year than all of Ireland as a whole. Each Bitcoin transaction uses an average of 300 kilowatt hours of electricity, which is enough to bring 36,000 kettles full of water to a boil. Proof-of-stake, on the other hand, is said to be more energy-efficient than proof-of-work, while at the same time more secure. But its biggest disadvantage is that the miners (or stakeholders) are the ones who hold all the power. Unlike in proof-of-work, miners able to theoretically implement whatever changes they so choose without having to get approval from developers or community members. This contradicts the coin’s supposed “decentralized nature” by potentially putting all the voting power & control in the hands of a centralized few.
Proof of Stake... capiamoci qualcosa | BlockChain Caffè
 
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Parrebbe essere l'alternativa per eccellenza alla Proof of Work, ma i meccanismi alla base di Proof of Stake espongono il fianco a molte critiche, prima tra tutte quella secondo cui "i ricchi diventano più ricchi". A parte questo ci sono altre fragilità (ad esempio non può boostrappare una blockchain...). E' quindi il caso di capirci un po' di più... Iscriviti! : http://bit.ly/BCC-YT Sito: : https://www.blockchaincaffe.it/ Twitter : https://twitter.com/BlockChainCaffe Facebook : https://www.facebook.com/BlockchainCaffe/ Newsletter : https://www.blockchaincaffe.it/newsletter/ Dona : http://bit.ly/BCC-DONA La Tazza! : http://bit.ly/BCC-TAZZA Ledger Nano : http://bit.ly/BCC-NANO
Views: 4723 BlockChain Caffè
Why Proof of Stake doesn't really make sense to me
 
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-------------------------- Seminar: http://programmingblockchain.com/ Newsletter: http://eepurl.com/cZr_Aj Medium: https://medium.com/@jimmysong Twitter: https://twitter.com/jimmysong Github: https://github.com/jimmysong
DPoS: The Sleeper Consensus Algorithm?
 
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Delegated-proof-of-stake is markedly different from Proof-of-Work and Proof-of-Stake in that it's permissioned by stakeholders -- meaning 'decentralization' can be cryptographically enforced. Bitshares developer Fabian Schuh explains what this means in terms of security. Check out our new channel! http://youtube.com/dashorg Connect with us! [website] http://TheDailyDecrypt.com [tweets] http://twitter.com/TheDailyDecrypt [facebook] http://facebook.com/TheDailyDecrypt [RSS feed]: http://TheDailyDecrypt.com/posts/feed [subreddit]: http://reddit.com/r/TheDailyDecrypt Wanna sponsor a show? http://thedailydecrypt.com/Sponsorship Sponsor: Bnk to the Future: https://bnktothefuture.com Bnk to the Future's investment in BitPesa: https://www.youtube.com/watch?v=Vc5DPUBZhEE&list=PLrou7z4TGqLNAoBys6HL5u3tF9wLEcXjf Show links: Delegated Proof-of-Stake, detailed: https://bitshares.org/technology/delegated-proof-of-stake-consensus Lisk crowdsale details: http://www.smithandcrown.com/lisk-raises-6-million-ico-building-dapps-javascript Music: "House of the Rising Sun" by Animals: https://www.youtube.com/watch?v=5A-4VGfx5lU
Views: 11138 Amanda B. Johnson
Peter Todd on Blockchain security and limitations. PoW vs PoS
 
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Old unpublished interview from Anarchopulco Conference, in March 2015, Acapulco, Mexico. Covered topics include, the weaknesses of Proof of Work and Proof of stake. ATM bitcoin fraud and double spending software. Bitcoin free market fee designations. Instant transactions vs confirmation times. Replace by fee, scorch earth as double spend protection.
Views: 4259 Juan Galt Crypto TV
Blockchain Sharding, and correlations with Proof of Stake with Vlad Zamfir of Ethereum - Part 5 of 5
 
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In the last part of my Interview with Vlad Zamfir, we have Hard talk about Ethereum's sharding options, and what the difficulties are. Is Sharding doable without proof of work? And are the difficulties of Proof of Stake not so trivial after all? What's next for Vlad ?
Views: 6249 Bitcoin Uncensored
The QASH blockchain will be proof-of-stake
 
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AMA wtih QUOINE Chief Trading Officer Andre Pemmelaar.
Views: 255 Liquid
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: 14643 aantonop
What is Proof of Capacity (PoC) ?
 
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Is Proof of Capacity the future of Crypto Mining? Find out in my new video! 📈 BINANCE, reopened new user registrations: https://www.binance.com/?ref=16696186 🆕 Altcoin Exchange with Atomic Swaps: http://www.altcoin.io?kid=KMKC7 🥑 COINCADO - Crypto News, Tutorials & Reviews! Blog: http://coincado.com/ Twitter: https://twitter.com/coincado Facebook: https://www.facebook.com/coincado Steemit: https://steemit.com/@coincado Keywords: proof of capacity, proof of capacity coins, proof of capacity algorithm, proof of capacity vs proof of stake, proof of capacity cryptocurrency, proof of capacity blockchain, proof of capacity burst, bitcoin ore, proof of capacity vs proof of work, PoW, PoS, PoC, PoSe, proof of capacity meaning, proof of stake meaning, proof of work meaning, proof of capacity tutorial, what is proof of capacity, what is poc, what is pow, what is pos, what is pose
Views: 2000 COINCADO
What is Proof of Stake? // Blockchain Bonanza
 
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I was busy at work founding https://SmartIFT.com for the last month and didn't get around to a single video, so this month I'm doing a video a day about the blockchain. Today we learn what proof of stake is compared to proof of work. You can check me out on twitter https://twitter.com/GuyRobotTV and my blog at http://GuyRobot.TV If you want to take a look at what I've been doing with my blockchain startup then don't forget to look at https://SmartIFT.com
Views: 146 Guy, Robot
Parity в сетях Proof of work, Proof of stake, Денис Солдатов | Blockchain Development
 
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Денис Солдатов, DevOps at Parity Tecnologies «Parity в сетях Proof of authority, Proof of work, Proof of stake» Блокчейн-митапы в Санкт-Петербурге проходят каждый вторник по адресу: ул. Казанская, 7 - Место Встречи с 19:30. Вход для всех свободный по предварительной регистрации: https://cyber-fund.timepad.ru/event/571572/ + free beer & snacks Cyber Events VK: https://vk.com/blockchainmeetups Cyber Events FB: https://www.facebook.com/blockchainmeetups/ Local Telegram Channel: https://t.me/cyberspb Meetup.com: https://www.meetup.com/cyberspb/ Это видео подготовлено cyber•Fund Мы занимаемся аналитикой и разработкой новых сервисов на базе блокчейн технологий. Больше о нашей работе вы можете узнать из следующих ресурсов: Наши проекты: cyber•Fund - аналитика и разработка Golos.io - медийная блокчейн платформа Satoshi.fund - первый фонд инвестирующий в криптоактивы Cybernator.org - инвестиции в стартапы на pre-seed стадии. Cледите за нами в социальных сетях: Блог: https://blog.cyber.fund/ Социальные сети: https://golos.io/@cyberfund https://steemit.com/@cyberfund https://twitter.com/cyberfundio https://www.facebook.com/cyberfund https://www.slideshare.net/CyberFund-Official Для разработчиков: https://t.me/CyberFundDev - telegram чат для блокчейн разработчиков https://github.com/cyberFund - наш репозиторий на Github
Views: 263 cyber • Fund
Moving from Proof of Work (POW) to Proof of stake (POS)
 
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Moving from Proof of Work (POW) to Proof of stake (POS). Consensus algorithms can be changed in a blockchain platform. This makes me more confident about Ethereum because with Vitalik Buterin as leader I feel they are on top of this and can adopt a new consensus algorithm if its found to be the best. On the other hand, this concerns me long term for bitcoin which doesn't have a leader and struggles with upgrades. Will it be able to scale fast enough to maintain its lead? For the latest info on IOTA check out my latest video. I no longer have much confidence in its consensus algorithm
Views: 395 Dave Levine Dot Com
The Byzantine Generals Problem and Blockchain Consensus Models | A Deep Dive
 
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In this video, I cover the Two Generals Problem, The Byzantine Generals Problem, Byzantine Fault Tolerance, Proof of Work, Proof of Stake, and Delegated Byzantine Fault Tolerance. The Byzantine Generals problem will help others understand why a blockchain does what it does, and it illustrates why they are important. Originally I was designing this video to just highlight DBFT, NEO’s consensus model, but naturally, I got a little carried away and produced this massive video. That being said, when analyzing one consensus model, it’s important to understand how they compare to other existing models. If this is too long to sit through feel free to skip around! 0:52 Two Generals Problem 2:19 Byzantine Generals Problem 5:20 Byzantine Fault Tolerance 6:25 Proof of Work Consensus 10:14 Proof of Stake Consensus 12:30 Delegated Byzantine Fault Tolerance 17:00 “I thought NEO was proof of stake?” Add me on Linkedin! https://www.linkedin.com/in/avery-carter-705ba6132 ---------- Resources: Article on the Byzantine Generals Problem https://medium.com/loom-network/understanding-blockchain-fundamentals-part-1-byzantine-fault-tolerance-245f46fe8419 Article on Proof of Work & Proof of Stake https://medium.com/loom-network/understanding-blockchain-fundamentals-part-2-proof-of-work-proof-of-stake-b6ae907c7edb Satoshi Nakamoto’s Email https://www.mail-archive.com/cryptography@metzdowd.com/msg09997.html Ethereum Docs on Proof of Stake https://github.com/ethereum/wiki/wiki/Proof-of-Stake-FAQ#what-is-the-nothing-at-stake-problem-and-how-can-it-be-fixed NEO Docs on DBFT http://docs.neo.org/en-us/basic/consensus/consensus.html http://docs.neo.org/en-us/basic/consensus/whitepaper.html
Views: 2336 Avery Carter
Prof. Kiayias - Ouroboros - A Provably Secure Proof of Stake Blockchain Protocol, CARDANO
 
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https://iohk.io/research/papers/a-pro... 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=q5sCs... 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... -- 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/
Views: 496 Quantum Fields
IOHK | What is Proof of Stake?
 
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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. In this video, Prof Aggelos Kiayias provides an in-depth analysis into Proof of Stake and its many benefits compared to Proof of Work. 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/ -- 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: 2442 IOHK
Neo vs Eos vs Cardano ( Comparison )
 
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Neo, Eos and Cardano are open source blockcain technology platforms unable developers to run smart contracts and build decentralized applications. They have a number of differences, form market capitalizations to consensus mechanism. NEO, uses consensus mechanism calls Delegated Byzantine Fault Tolerance. This system uses community voted delegates, who speak up for a group of Neo users. Eos uses very similar consensus mechanism, it calls delegated proof of stake and it also uses a voting mechanism. Cardano uses slightly different proof of stake mechanism. It is calls Ouroboros. ================================================= 💰Get a Coinbase Wallet! - https://www.coinbase.com/join/5a4bf25... Sign up! 💰Get a Binance Wallet! - https://www.binance.com/?ref=21867060 Sign up! =================================================== ★ Any donation is highly appreciated. 🔑 BTC Wallet Address: 16EtKHG2rwH2NqA4MniK4JRhzPyv5AeiER 🔑 ETH Wallet Address: 0x1db0fa9a379e46cb205a39a0766e30d3e3d0d11e 🔑 LTC Wallet Address: LRcmBavhskBURqmw1sujV5LS8WUPvfaNj8 =================================================== ➤ Ripple vs Stellar: https://www.youtube.com/watch?v=kd3WyPTJONg ➤ Cardano vs Eos: https://www.youtube.com/watch?v=4gZYxdDjWbE ➤ Hashgraph vs Blockchain: https://www.youtube.com/watch?v=5l3-voCGJ3U ==================================================== Thank you so much for watching! ==================================================== Neo | Eos | Cardano | Cryptocurrency | Blockchain | consensus mechanism | delegated proof of stake
Views: 39382 Aimstone