Home
Search results “Merkle trees bitcoin”
What is the merkle tree in Bitcoin?
 
03:53
Explanation of cryptographic hash: https://youtu.be/IVqD-_QskW0?t=1m13s 13uJjYF12aRVdwaiTmALx5XDfguQ9MnYtK
Views: 16194 Keifer Kif
Bitcoin 101 - Merkle Roots and Merkle Trees - Bitcoin Coding and Software - The Block Header
 
24:18
Most people on earth have never even heard of Merkle roots. But bitcoin programmers deal with them every day. This is old school technology in terms of software, but still very important in terms of security and data management. In this video James will walk you into the world of Merkle roots and Ralph Merkle, who invented this technology in the late 1980s. If you like seeing actual coding examples, your in luck. James starts incorporating actual python examples...after all, would you want to listen to Car Talk and not want to hear about a muffler? Enjoy. Ken's great blog and code is here (near bottom of the page) http://www.righto.com/2014/02/bitcoin-mining-hard-way-algorithms.html Our reworking of Ken's code is here - Very user friendly https://github.com/wobine/blackboard101/blob/master/IntroToMerkleRootsWBN.py And here's the blockexplorer link to the actual block we explored http://blockexplorer.com/block/0000000000000000e067a478024addfecdc93628978aa52d91fabd4292982a50 Welcome to WBN's Bitcoin 101 Blackboard Series -- a full beginner to expert course in bitcoin. Please like, subscribe, comment or even drop a little jangly in our bitcoin tip jar 1javsf8GNsudLaDue3dXkKzjtGM8NagQe Thanks, WBN I tried to paste my code here but YouTube doesn't allow brackets!!! Freaks.
Views: 33252 CRI
Bitcoin Internals: Verifying Merkle Roots using Merkle Proofs in JavaScript
 
10:33
In this video we expand on the previous one where we computed a given list of transactions Merkle root using Merkle trees. We will now compute a Merkle proof for a given transaction, allowing clients to validate that a transaction exists in a block without having to download it's entire contents. This technique is used widely in light-weight Bitcoin clients (using Simplified Payment Verification). We codify a JavaScript solution which will create a Merkle proof for a transaction and then do the inverse and validate that proofs claim based on the blocks Merkle root. Discussed in the video: - https://bitcoin.org/en/glossary/simplified-payment-verification - https://www.bitcoinbook.info/ The source-code for this video can be found here: https://gist.github.com/eddmann/6b8d0ddd3123c37f296b7680b8fa198a
Views: 2880 Edd Mann
Blockchain/Bitcoin for beginners 7: Blockchain header: Merkle roots and SPV transaction verification
 
39:40
How are transactions stored (and recorded) in the Blockchain blocks? Using a concept called a Merkle tree - in this video I break it down in depth with a simple example and show how a SPV node (Simple Payment Verification) node that does not keep a full copy of the blockchain transaction history - just the headers of the blocks - can verify from an adjacent (but not necessarily trusted) full node, which block a transaction is part of just from knowing the MERKLE PATH from the full node. http://chimera.labs.oreilly.com/books/1234000001802/ch07.html
Views: 11152 Matt Thomas
Blockchain Basics Explained - Hashes with Mining and Merkle trees
 
03:24
A brief and simple introduction to the hash function and how blockchain solutions use it for proof of work (mining) and data integrity (Merkle Trees).
Views: 196806 Chainthat
Bitcoin Internals: How Blocks use Merkle Trees in JavaScript
 
11:43
In this video I take a look into how Bitcoin internally uses Merkle trees to generate it's block Merkle roots. We delve into how this is computed and why it is so important to validate the state of transactions. We then move on to create a simple script in JavaScript that computes the Merkle root of a given block's transactions, and verifies this with the value stored within the block. Discussed in the video: - https://www.bitcoinbook.info/ - https://bitcointalk.org/index.php?topic=45456.0 - https://bitcoin.stackexchange.com/questions/2063/why-does-the-bitcoin-protocol-use-the-little-endian-notation The source-code for this video can be found here: https://gist.github.com/eddmann/0af11a2436202cd994ecf73f70d49674
Views: 987 Edd Mann
Programmer explains Merkle Tree | Blockchain technology
 
10:55
What are merkle trees and how are they used in blockchains such as Bitcoin or Ethereum? https://steemit.com/@ivanli Thanks for watching guys, if you'd like to support me and donate to the channel, here are my addresses: 💎 ETH 0x27F80bc928aB65B499514D9a429249F55849fc75 💎 LTC LWzA2kd6PB3niQcegAmJbTTpE5ovf812Mj 💎 BTC 1QLBCmPsrDS8YHe5AApPyFsHFnvPsTenj4 💎 DASH XfX56mNDawvmxxWv3nF9Ev93W4MsmCbeXp
Views: 9295 Ivan on Tech
Bitcoin 101   Merkle Roots and Merkle Trees   Bitcoin Coding and Software   The Block Header
 
24:18
MAKE MONEY ONLINE 2018-2019! The best websites, apps, tips, trick, strategies and secrets to help you make money online in 2018 or 2019. Find out how you can start making money online using the newest and best writing for pay strategies and techniques to start earning online income. http://dollardrip.com http://dollardrip.com/make-money-online http://dollardrip.com/about http://dollardrip.com/contact Ways to make fast, easy money online. http://DollarDrip.com members help each other make money online. Our website teaches you how to start making money on the internet, while members contribute and add to our ever-growing collection of resources. DollarDrip.com members have access to an exclusive, members-only forum, premium tools, software, private blog posts and more. SIGN UP NOW http://dollardrip.com/register
Views: 0 DollarDrip
Bitcoin/Altcoin Developer Guide - 3 - Merkle Trees
 
05:10
In these tutorials I teach you how become a bitcoin/altcoin developer. I will be going through the entire bitcoin developer reference and in each tutorial I will explain one or more key concepts involving bitcoin. This one is all about merkle trees which you can think of as the way that bitcoin and many altcoins organise and secure the transactions that live inside a block. The video explains how this data structure works, and the different cases you might see. Bitcoin Stack Exchange https://bitcoin.stackexchange.com/ Consensus code https://github.com/libbitcoin/libbitc... Developer reference https://bitcoin.org/en/developer-refe... Source Code for Bitcoin: https://github.com/bitcoin/bitcoin Installation guide for Bitcoin Core on Unix: https://github.com/bitcoin/bitcoin/bl... Installation guide for Windows: https://github.com/bitcoin/bitcoin/bl...
Views: 123 Oscar Chambers
Random Crypto-Currency Concept #1 - Merkle Trees
 
04:03
Today I talk about Merkle Trees and their application in crypto-currencies such as Bitcoin. If you liked this video please help support the creation of more. Bitcoin Donations: http://bit.ly/2riKLEV Ethereum Donations: http://bit.ly/2stNxv2 Dash Donations: http://bit.ly/2t39239 Twitter: http://bit.ly/2yYqTNI Instagram: http://bit.ly/2AX6tWI Subreddit: http://bit.ly/2BPNfzt Facebook: http://bit.ly/2AVJtr8 Outtro Music: Andrew ApplePie - http://bit.ly/2yYMDZF
Views: 10159 AltcoinXP
Bitcoin Tutorial #35 - Merkle Trees
 
06:29
In diesem Tutorial sehen wir uns an, wie Merkle Trees bei Bitcoin eine Rolle spielen. ❤❤❤ Früherer Zugang zu Tutorials, Abstimmungen, Live-Events und Downloads ❤❤❤ ❤❤❤ https://www.patreon.com/user?u=5322110 ❤❤❤ ❤❤❤ Keinen Bock auf Patreon? ❤❤❤ ❤❤❤ https://www.paypal.me/TheMorpheus ❤❤❤ 🌍 Website 🌍 https://the-morpheus.de ¯\_(ツ)_/¯ Tritt der Community bei ¯\_(ツ)_/¯ ** https://discord.gg/BnYZ8XS ** ** https://www.reddit.com/r/TheMorpheusTuts/ ** ( ͡° ͜ʖ ͡°) Mehr News? Mehr Code? ℱ https://www.facebook.com/themorpheustutorials 🐦 https://twitter.com/TheMorpheusTuts 🐙 https://github.com/TheMorpheus407/Tutorials Du bestellst bei Amazon? Bestell über mich, kostet dich null und du hilfst mir »-(¯`·.·´¯)-» http://amzn.to/2slBSgH Videowünsche? 🎁 https://docs.google.com/spreadsheets/d/1YPv8fFJOMRyyhUggK8phrx01OoYXZEovwDLdU4D4nkk/edit#gid=0 Fragen? Feedback? Schreib mir! ✉ https://www.patreon.com/user?u=5322110 ✉ https://www.facebook.com/themorpheustutorials ✉ https://discord.gg/BnYZ8XS ✉ kontakt@the-morpheus.de oder schreib einfach ein Kommentar :)
Merkle Trees and Patricia Tries - Blockchain for Developers [Lab 7]
 
36:53
Blockchain for Developers Lab 7 - Luke Strgar and Gary Li
The Blockchain & Bitcoin - Computerphile
 
17:46
Blockchain is the underlying technology behind cryptocurrencies bringing together Merkle trees, Hashing & Distributed Architecture. Christopher Ellis explains. Note1 - At 6:46 when Chris is drawing the Merkle Tree, C would actually be duplicated and hashed with itself not with B. So you would get H(C - C) instead of H(B - C). Note2 - At minute 17, Christopher mentioned the mining reward halving at 21,000 bitcoins but meant 210,000 blocks. Public Key Encryption: https://youtu.be/GSIDS_lvRv4 The Perfect Code: https://youtu.be/WPoQfKQlOjg 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: 205351 Computerphile
IOTA tutorial 18: Merkle Tree
 
06:33
If you like this video and want to support me, go this page for my donation crypto addresses: https://www.youtube.com/c/mobilefish/about This is part 18 of the IOTA tutorial. In this video series different topics will be explained which will help you to understand IOTA. It is recommended to watch each video sequentially as I may refer to certain IOTA topics explained earlier. The main objective of this video is to provide you with some basic knowledge about the Merkle tree. The Merkle tree is used in IOTA's Masked Authenticated Messaging. IOTA's Masked Authenticated Messaging will be explained in IOTA tutorial 19. A hash tree or Merkle tree is a tree structure in which each leaf node is a hash of a block of data and each non-leaf node is a hash of its children. This results in a single hash called the Merkle root. If every node has two children, the tree is called a binary hash tree. Why use a Merkle tree? Why not hash all messages (m0-m15), append the hashed messages and then hash it all to get one root hash value. Bob get the root hash from a trusted source. If Alice wants to proof to Bob that m6 is not tampered with, she needs to send message m6 and all other hashed values: H(m0), H(m1), H(m2), H(m3), H(m4), H(m5), H(m7), H(m8), H(m9), H(m10), H(m11), H(m12), H(m13), H(m14) and H(m15) to Bob. Bob hashes message m6, append all hashes to a single string and hash this string to get one root hash. Bob compares this new root hash with the trusted source root hash to check if message m6 is not tampered with. In this example Alice has to provide 15 hashed values and the message m6 to Bob to prove that message m6 is not tampered with. A much better solution is using a Merkle tree (16 leaves) Again as before Bob gets the root hash from a trusted source. If Alice wants to proof that m6 is not tampered with, she needs to send m6 and 4 hashed values to Bob. With the received information Bob calculates the root hash value. Bob compares this root hash with the trusted source root hash to check if message m6 is not tampered with. In this example Alice only needs to provide 4 hashed values and the message m6 to Bob to prove that message m6 is not tampered with. Using a Merkle tree provides integrity and validity of your data using a small amount of data that a trusted authority has to maintain. This also means little memory / disk space is needed. If a Merkle tree has more leaves less hashed values are needed, in comparison to the number of leaves, to validate if a message is not tampered with. A perfect Merkle binary tree has the following properties: - The number of leaves is always 2n (n=0, 1, 2, 3,..). - Each node has 0 or 2 children. - All leaves are on the same level. In a perfect binary tree the following formulas can be applied: Total number of leaves = L = (N + 1) / 2 Total number of nodes = N = 2L - 1 Total number of levels = LV = log2(L) + 1 = (ln(L) / ln(2)) + 1 Number of leaves = L = 1 Number of nodes = N = 1 Number of levels = LV = 1 Number of leaves = L = 2 Number of nodes = N = 3 Number of levels = LV = 2 Number of leaves = L = 4 Number of nodes = N = 7 Number of levels = LV = 3 Number of leaves = L = 8 Number of nodes = N = 15 Number of levels = LV = 4 Number of leaves = L = 16 Number of nodes = N = 31 Number of levels = LV = 5 Check out all my other IOTA tutorial videos: https://goo.gl/aNHf1y Subscribe to my YouTube channel: https://goo.gl/61NFzK The presentation used in this video tutorial can be found at: https://www.mobilefish.com/developer/iota/iota_quickguide_tutorial.html #mobilefish #howto #iota
Views: 3235 Mobilefish.com
What Are Merkle Trees? [Blockchain & Cryptocurrency (Bitcoin, Ethereum)]
 
08:25
Full Course On Udemy Discounted Coupon 95% OFF - https://www.udemy.com/bitcoin-ethereum-blockchain/?couponCode=YOUTUBE Like our content and want to support us more directly? Help Us, Help You! https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=6DF2Q8TR5FB3E Udemy Coupons "Here are coupons for all of my udemy courses: -Three.js [50% OFF] - https://www.udemy.com/threejs-programming/?couponCode=10ONLY -Flappy Bird SFML Clone [50% OFF] - https://www.udemy.com/flappy-bird-sfml/?couponCode=50-OFF -HTML [50% OFF] - https://www.udemy.com/html-tutorials/?couponCode=50_P_OFF -CSS [50% OFF] - https://www.udemy.com/css-course/?couponCode=CSS50POFF -Tic-Tac-Toe Cocos2d-x [50% OFF] - https://www.udemy.com/tic-tac-toe-cocos2d-x-cpp/?couponCode=TTTCC2D-50OFF -Tic-Tac-Toe SFML [50% OFF] - https://www.udemy.com/tic-tac-toe-sfml/?couponCode=SFMLTTT-50OFF -Cocos2d-x Game Development [90% OFF] - https://www.udemy.com/cocos2d-x-v3-cpp/?couponCode=90-PERCENT-OFF -A-Frame WebVR (Virtual Reality) [75% OFF] - https://www.udemy.com/a-frame-webvr/?couponCode=75_PERCENT_OFF -Modern OpenGL [80% OFF] - https://www.udemy.com/opengl-tutorials/?couponCode=10GLCODE -Bootstrap 4 [80% OFF] - https://www.udemy.com/bootstrap-web/?couponCode=80-OFF -C++ Programming [90% OFF] - https://www.udemy.com/cpp-course/?couponCode=BIG_SAVING_CPP -Ionic AngularJS [75% OFF] - https://www.udemy.com/ionic-course/?couponCode=75_OFF -Swift Programming [87.5% OFF] - https://www.udemy.com/swift-ios-mac/?couponCode=DISCOUNT_10 For all new courses feel free to ask for a coupon, enjoy. If you like this stuff, as always, show the love through comments, likes, favorites, subscriptions, etc. Thousands of free videos at www.sonarlearning.co.uk If you have any questions feel free to post them at http://www.sonarlearning.co.uk/questions.php Our Website http://www.sonarsystems.co.uk/ Facebook - https://www.facebook.com/pages/Sonar-Systems/581403125243822 Twitter - https://twitter.com/SonarSystems Google+ - https://plus.google.com/+SonarsystemsCoUk/ Donate - https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=6DF2Q8TR5FB3E Our games made using Cocos2d-x ------------------------------------------------------ iOS: https://itunes.apple.com/us/artist/sonar-systems/id672545941 Google Play: https://play.google.com/store/apps/developer?id=Sonar+Systems Check out our Cocos2d-x book to learn how to make games https://www.packtpub.com/game-development/cocos2d-x-game-development-essentials
Views: 121 Sonar Systems
What is a Merkle Tree?
 
07:06
In this video, I answer a question from one of the students of the Blockchain Bitcoin Fundamentals course. His question is "What is a Merkle Tree?" In this lesson, taken from the course, you will see what is a Merkle Tree as well as a Merkle Root, and how they are an integral part of the Bitcoin blockchain. Learn more about blockchain and Bitcoin with the Blockchain and Bitcoin Fundamentals course found at the following link: http://BlockchainandBitcoinFundamentals.com https://GeorgeLevy.com/Free For more information on the Blockchain Institute of Technology and available courses, visit: https://BlockchainInstituteofTechnology.com Special offer for George Levy channel viewers, open a new Bitcoin wallet for Free and get $10 bonus in Bitcoin at: https://blockchaininformer.com/btcwallet
Views: 1131 George Levy
L'Integrità dei Dati nella Blockchain: il Merkle Tree
 
09:20
Ricevi gratuitamente gli studi sui Pattern Armonici e di Analisi Tecnica ogni settimana sui mercati finanziari. Iscriviti qui: http://goo.gl/JIhOHJ ============= PARTECIPA AL MIO CORSO COMPLETO ONLINE SUL TRADING : https://goo.gl/8MGUDh ISCRIVITI AL MIO CORSO ONLINE SULLE CRIPTOVALUTE: https://goo.gl/i7FKxm ============= Puoi seguirmi sui miei canali social: TradingView: https://it.tradingview.com/u/marco_casario/ Facebook: https://www.facebook.com/The10MinTrader/ Twitter: https://twitter.com/The10MinTrader Instagram: https://www.instagram.com/the10mintrader/
Views: 2575 Marco Casario
Merkle Trees - Efficient Data Verification
 
05:04
About Merkle Trees, used for Efficient Data Verification. In today's episode Nick... branches out and discusses Merkle Tree, that's all I've got for this one. =========================== I'm not a financial adviser. Do your own research. Full disclosure, I own a lot of coins. My holdings: https://goo.gl/Vjn9iK Do not simply buy what I buy (I've made a lot of bad choices) #sellout Ledger Nano S is the hardware wallet I use and recommend: https://ledgerwallet.com/r/c241 Recommended Exchanges - Coinbase: http://coinbase.com/join/59ebf3c17be1... - Binance: https://www.binance.com/?ref=15811261 Twitch: https://www.twitch.tv/HardlyDifficult Twitter: http://twitter.com/HardlyDifficult Tips \o/ BTC: 3FQdCDmZcXXE8psTfazXxHKsdaLsXgxfWs ETH (incl any ERC20): 0x7A23608a8eBe71868013BDA0d900351A83bb4Dc2 LTC: MGF4vG8QT68otdbKT1ZjpqmFmkir67Wnjk NEO (incl any NEP5): AKSB636yR6wi4ivM7kJX3i999u3JGVgp5A DASH: XcCCFMgbNmCHiNEj1EbNGvSQBcRM8VCNNM XRP: rNzNyrJ73BB28EtgE9nGoXQSewZeAkrnje XLM: GC2WW5SEPX6JLCVRX7AYUIKPSMN54EGFM5C6KOATCJERFEQWBO5G6W6A ZEC: t1bpozqAKUDy54r1damcq2MWrEVh9Y6HcDj ETC: 0xC86893D03497236b2614FFe29D57C22dc40fb952 BCH: 1QKaWPmu73FbKLtUCvqaByYr4HkT4opG2S DOGE: DBXHiZU28rGRxPVACjPTC24bBfhURf85x6
Views: 1128 Hardly Difficult
Segwit (Bitcoin): Hashes and Merkle Trees explained
 
05:28
A brief non technical explanation of what these are and how bitcoin uses them, particularly in segwit
Views: 377 Bobby Blockchains
1 Introduction Oneway ,SHA256, and Merkle Tree - Merkle Tree
 
07:25
Code github : https://github.com/JaeDukSeo/Simple-Merkle-Tree-in-Python Website: http://jaedukseo.com/ For more information please visit: https://brilliant.org/wiki/merkle-tree/
Views: 4517 Jae duk Seo
Bitcoin là gì? Cấu tạo của merkle tree trong bitcoin. |-blockdev-|
 
20:57
Bitcoin là gì? Các thành phần cơ bản của bitcoin.
Views: 708 block dev
BITCOIN [ Class 3]: Bitcoin Mining/ Proof of Work - Hash Functions - Merkle Trees (2018)
 
11:48
Get More Tech Videos - Subscribe ➜ http://bit.ly/2Mtee9Z Share This Video ➜ https://youtu.be/UH8zL-_1cx4 ---------------------------------------------------------------------------------------------------------------- In this Video you will learn in details what Mining in Bitcoin is all about. We dive deep into: 🔸 What exactly the miners have to do in order to mine the block 🔸 Their economical incentives 🔸 What is inside of a Block 🔸 What a Merkel Root & a Merkel Tree is 🔸 Hash Functions 🔸 & More.... Pay attention to this video, because this information is probably the most important and complete one, in order to take your knowledge about Bitcoin to the next level..... ---------------------------------------------------------------------------------------------------------------- 🔷 FIND ME ON SOCIAL MEDIA 🔷 ➜ Facebook: https://www.facebook.com/Tech-With-Catalina-424220764702118/ ➜ Steemit: https://steemit.com/@techwithcatalina/feed ➜ Instagram: https://www.instagram.com/techwithcatalina/ ➜ Twitter: https://twitter.com/techwithcatalin ***DISCLAIMER***: This is NOT financial advice. You are responsable for your decisions and investments you do. I am only sharing my personal opinion.
Views: 143 Tech with Catalina
!!Con 2017: How Merkle Trees Enable the Decentralized Web! by Tara Vancil
 
10:06
How Merkle Trees Enable the Decentralized Web! by Tara Vancil Decentralized networks operate without relying on a central source of truth, and instead rely on group coordination in order to establish a shared state. Trust is distributed among participants, so to have confidence that each participant is telling the truth, there must be a mechanism for guaranteeing that participants have not accidentally corrupted or intentionally tampered with the system’s state. Enter the Merkle tree, a data structure that was patented in 1979, and because of its unique content validating and performance qualities, has since become the backbone of decentralized software like Git, BitTorrent, ZFS, and Ethereum. Tara helps build Beaker, a browser for the peer-to-peer Web. She’s enthusiastic about decentralizing the Web, and thinks that peer-to-peer protocols will reinvigorate the creativity of the Web’s early days.
Views: 8142 Confreaks
#️⃣ Wie machen Hashes die Bitcoin Blockchain unveränderlich? 🌳 Merkle Trees!
 
12:13
In diesem Video will ich euch den zweiten wesentlichen kryptographischen Baustein von Blockchains nahebringen. Hashes dienen bei Bitcoin dazu die Integrität der Daten sicher zu stellen. http://dasunwahrscheinliche.de
SF Bitcoin Devs Seminar: Key Tree Signatures
 
53:49
Pieter Wuille, Bitcoin Core Developer and Blockstream Co-Founder, spoke about Key Tree Signatures. Bitcoin supports multisig transaction outputs, which require more than a single signature to unlock. These can be used for low-trust escrow, two-factor security (signatures by two devices) and funds with shared control. However, Bitcoin's multisig support is based on OP_CHECKMULTISIG internally, which has significant limitations. For one, it only supports up to 15 keys, and has a high verification cost to the network. If we restrict the problem to 1-of-N multisig (as opposed to K-of-N), all we need is to be able to cheaply prove that a particular given key is part of a set that is known in advance, plus verify a signature by that key. For the first part, we could use a Merkle tree, if we could implement Merkle branch verification inside script. This is not possible in Bitcoin because it needs OP_CAT which was disabled years ago. In Elements Alpha, a first demo sidechain by Blockstream, this opcode was reenabled, making cheap 1-of-N possible. Alpha has another change, namely using Schnorr signatures rather than ECDSA signatures. Schnorr signatures support native K-of-K multisig, with the same efficiency as a single 1-of-1 key. We can combine these two changes to support K-of-N: build a Merkle tree where every leaf is a Schnorr combination of a set of K of the N keys. This results in signatures that are at worst half the size as OP_CHECKMULTISIG ones, and are far faster to verify, We can even go further, and introduce a small language for describing sets of permissible keys for signing, as the approach above is not limited to just K-of-N. For more information see: https://blockstream.com/2015/08/24/treesignatures/
Views: 1347 SF Bitcoin Developers
Plasma Implementers Call #7: Merkle Trees in Bloom [filters]
 
55:11
Today we discuss designs which involve sparse merkle trees, bloom filters, and some more splitting! We also welcome the Blockchain @ Berkeley crew who are working on a great Plasma Cash implementation! Yay! - B@B Repo - https://github.com/FourthState - B@B Ethresearch post - https://ethresear.ch/t/plasma-vulnerabiltity-sybil-txs-drained-contract/1654/2 - Sparse Merkle Tree implementation -- https://github.com/ethereum/research/tree/master/trie_research/bintrie2 - Paper on Sparse Merkle Trees -- https://eprint.iacr.org/2016/683.pdf - Non-inclusion proofs -- https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2018-March/015817.html
Views: 1038 Plasma
How Merkle Trees Enable the Decentralized Web!
 
09:44
Decentralized networks operate without relying on a central source of truth, and instead rely on group coordination in order to establish a shared state. Trust is distributed among participants, so to have confidence that each participant is telling the truth, there must be a mechanism for guaranteeing that participants have not accidentally corrupted or intentionally tampered with the system’s state. Enter the Merkle tree, a data structure that was patented in 1979, and because of its unique content validating and performance qualities, has since become the backbone of decentralized software like Git, BitTorrent, ZFS, and Ethereum. Tara helps build Beaker, a browser for the peer-to-peer Web. She’s enthusiastic about decentralizing the Web, and thinks that peer-to-peer protocols will reinvigorate the creativity of the Web’s early days. EVENT: !!Con 2017 SPEAKER: Tara Vancil PERMISSIONS: The original video was published with the Creative Commons Attribution license (reuse allowed). CREDITS: Original video source: https://www.youtube.com/watch?v=3giNelTfeAk
Views: 8700 Coding Tech
Merkle Tree Proof (MTP) Algorithm in Zcoin
 
02:50
Zcoin is the first cryptocurrency to successfully code MTP from the ground up and implement it. MTP is an algorithm that offers a memory hard proof of work that remains lightweight to verify thus promoting a decentralized and scalable network. https://www.zcoin.io Bitcointalk thread: https://bitcointalk.org/index.php?topic=1638450.0
Views: 7271 Zcoin
Blockchain Primer - Merkle Tree, DAG, Consensus, Nonce, ...
 
09:27
blockchain primer - Merkle Tree, DAG, Consensus, Nonce, ... Resources: The great BOOK: "Mastering Bitcoin": http://amzn.to/2BqmgNI * Home page: https://tomer-ben-david.github.io
Views: 401 Tomer Ben David
Dan's Intro to How Ethereum Works
 
10:55
MetaMask's Dan Finlay gives a basic technical overview of how Ethereum and blockchains work at the opening talks of the IPFS Ethererum Hackathon, Seattle 2017. Slides online here: https://github.com/MetaMask/IPFS-Ethereum-Hackathon/tree/master/slides/01_DanFinlay_intro_to_ethereum_blockchains
Views: 176689 MetaMask
Merkle Trees Explained
 
08:20
In this video I try to explain Merkle Tree.
Views: 1325 Mr. Rigden's Channel
016 Merkle Tree
 
05:12
Views: 2 BTC Micheal Mous
Blockchain tutorial 3: Hash
 
05:09
This is part 3 of the Blockchain tutorial explaining what hashes are. In this video series different topics will be explained which will help you to understand blockchain. Bitcoin released as open source software in 2009 is a cryptocurrency invented by Satoshi Nakamoto (unidentified person or group of persons). After the introduction of Bitcoin many Bitcoin alternatives were created. These alternate cryptocurrencies are called Altcoins (Litecoin, Dodgecoin etc). Bitcoin's underlying technology is called Blockchain. The Blockchain is a distributed decentralized incorruptible database (ledger) that records blocks of digital information. Each block contains a timestamp and a link to a previous block. Soon people realises that there many other use cases where the Blockchain technology can be applied and not just as a cryptocurrency application. New Blockchain platforms were created based on the Blockchain technology, one of which is called Ethereum. Ethereum focuses on running programming code, called smart contracts, on any decentralized application. Using the new Blockchain platforms, Blockchain technology can be used in supply chain management, healthcare, real estate, identity management, voting, internet of things, etcetera, just to name a few. Today there is a growing interest in Blockchain not only in the financial sector but also in other sectors. Explaining how Blockchain works is not easy and for many the Blockchain technology remains an elusive concept. This video series tries to explain Blockchain to a large audience but from the bottom up. Keywords often used in Blockchain conversation will be explained. Each Blockchain video is short and to the point. It is recommended to watch each video sequentially as I may refer to certain Blockchain topics explained earlier. Check out all my other Blockchain tutorial videos https://goo.gl/aMTFHU Subscribe to my YouTube channel https://goo.gl/61NFzK The presentation used in this video tutorial can be found at: http://www.mobilefish.com/developer/blockchain/blockchain_quickguide_tutorial.html #mobilefish #blockchain #bitcoin #cryptocurrency #ethereum
Views: 11849 Mobilefish.com
Bitcoin Blockchain   Bitcoin at the protocol level
 
41:59
James Turner will be covering Hashing and how it relates to bitcoin mining. P2P networks and CAP theorem with Distributed Ledgers. The Zeros and Ones. Cryptographic Signatures and Merkle Trees and a myriad of other bitcoiny things. James Turner is a Polyglot Programmer and CTO at magnr.com . 10 years+ programming experience, and 3 years with bitcoin programming.
Views: 867 WeAreEsynergy
Cryptocurrency from Scratch: Part 4: Transaction IDs and the Merkle Root
 
27:03
Part 4: Transaction IDs and the Merkle Root Showing how Bitcoin and other cryptocurrencies work by writing my own in Python. The fourth installment shows the transaction ID is created and how to create a merkle tree from a list of transactions. Code for this series is available at https://github.com/charlieb/blockchain_vid This video's code is in this commit: https://github.com/charlieb/blockchain_vid/tree/985a6132534c670d45efc16dab18fbee0c226b1b
Views: 116 Charlie Burrows
EB141 – Ralph Merkle: Revolutionizing Democracy Using DAOs
 
01:17:06
Support the show, consider donating: 1JiYLskKV4JcS4RuXQqJwC7LCmwmvuXoen (http://bit.ly/2amTtOL) Legendary scientist and cryptography pioneer Ralph Merkle joined us to discuss his recent paper on DAOs. Merkle examined how the voting mechanisms in today's democracies are flawed and how a decentralized, transparent DAO making decisions using prediction markets could create more efficient democratic systems. Topics covered included: - Merkle proofs, Merkle Roots and his early forays into cryptography - Blockchains as living organisms - Why DAOs will be subject to a Darwinian evolutionary process - Why voting is flawed and we need new governance methods to save democracy - The concept of a DAO democracy - How prediction markets and futarchy would help govern a DAO democracy Links mentioned in this episode: - Ralph Merkle DAO Democracy Paper [PDF] http://bit.ly/29XR7RG - Ralph Merkle's Homepage http://bit.ly/2anLaPA - Ralph Merkle's Wikipedia page http://bit.ly/2am6xE6 - EB98 - Robin Hanson: Futarchy, Prediction Markets http://bit.ly/2aE3djy - Tim Urban: Why Cryonics Makes Sense http://bit.ly/2akC6MV - Alcor - Life Extension Foundation http://bit.ly/2a9P7IM Sponsors: - Hide.me: Protect your privacy and personal data with a free VPN account at Hide.me/epicenter - Ledger Nano: Smart card security for your Bitcoins - Get 10% off your first order when you use the code EPICENTER at http://ledgerwallet.com Show notes: http://epicenterbitcoin.com/podcast/141 SoundCloud: http://soundcloud.com/epicenterbitcoin/eb-141 Epicenter Bitcoin is hosted by Brian Fabian Crain, Sébastien Couture & Meher Roy. - Visit our website: http://epicenterbitcoin.com - Subscribe to our newsletter: http://epicenterbitcoin.com/newsletter - Twitter: http://twitter.com/epicenterbtc
Views: 5199 Epicenter
What is inside a Bitcoin block? Programmer explains.
 
13:51
What is inside a bitcoin block and what is the importance of blocks? https://steemit.com/@ivanli HOW BLOCKCHAIN WORKS https://www.youtube.com/watch?v=Egp8wNvu6k8&t=301s Donation Addresses ( only for you that ABSOLUTELY want to support, you don't have to ) ❤️ 💎 ETH 0x27F80bc928aB65B499514D9a429249F55849fc75 💎 LTC LWzA2kd6PB3niQcegAmJbTTpE5ovf812Mj 💎 BTC 1QLBCmPsrDS8YHe5AApPyFsHFnvPsTenj4
Views: 10745 Ivan on Tech
Simple Blockchain in Python WITH MINING!
 
06:40
In this video we'll be creating our own blockchain in Python! We'll also be using SHA256 for our proof-of-work to mine our blockchain. Go to https://howcode.org for more! Source code: https://howco.de/simple-python-blockchain Link to DigitalOcean: http://howco.de/d_ocean Link to howCode Facebook: http://howco.de/fb Link to howCode Twitter: http://howco.de/twitter Link to /r/howCode: http://howco.de/reddit Don't forget to subscribe for more!
Views: 9498 howCode
Michael Flaxman's Lecture on Bitcoin at Mays Innovation Research Center at Texas A&M
 
53:10
On Thursday, March 1, 2018, Mr. Michael Flaxman, delivered his lecture "Understanding the Bitcoin Protocol (for Software Engineers)" to a group of students at Texas A&M University. The event was hosted by the Mays Innovation Research Center and co-hosted by the Texas A&M Computing Society. Bitcoin and “blockchain” have been appearing more often in the media, yet their fundamentals are rarely understood. This talk was designed for computer science students, so Mr. Flaxman started with a quick refresher on hash functions and asymmetric cryptography, and then dove into transactions and blocks. Mr. Flaxman also covered more advanced topics like Merkle trees, Bitcoin’s stack-based script language, node communication, and SegWit. The event ended with a Q&A session. Michael Flaxman is a software engineer and investor. He has built three venture-funded companies, thumbtack.com, Priceonomics, and CoinSafe, and he and is an alumnus of Y Combinator. He fell in love with Bitcoin in 2013, and he has built a number of blockchain applications including BlockCypher’s popular Block Explorer. Most recently, Michael was a Principal Engineer at Paxos, a blockchain company with offices in New York, London, and Singapore. Michael graduated from Brown University in 2007, and he moved to Austin in 2017 after spending time in Seattle, San Francisco, and Manhattan. See the slides: https://goo.gl/K8xFkZ
Views: 66 maysbusiness
Blockchain/Bitcoin for beginners 2: Hashing, blockchain networks, blockchain browser
 
26:39
Episode two of my series on Blockchain/Bitcoin. I build on the physical analogy in the first episode and explain the basic concepts behind a real blockchain network. Then go on to talk about hashing, and then give a live demo of the real Bitcoin blockchain to illustrate what a real blockchain looks like Bitcoin Blockchain browser https://blockchain.info Online hash calculator - great way to practice and familiarise with hash functions - one of the most important building blocks of Blockchain/Bitcoin http://www.fileformat.info/tool/hash.htm Course to date (previous videos) 1. https://youtu.be/xwA2TkcAQgQ
Views: 9292 Matt Thomas
The Bitcoin Tree
 
00:51
Everyone get something under the Bitcoin Tree
Views: 753 Casper Cheng
The Bitcoin Blockchain Explained
 
03:41
Forget the currency; it’s the protocol behind it that matters. Blockchains will mutate and take over everything we do on the Web. Trusting strangers with your digital information may sound silly, but it’s actually a revolution in distributed computing. And one day, systems like Bitcoin could be the future of all secure digital transactions. Read more: http://bit.ly/29jiJ3B
Views: 107064 IEEE Spectrum
Blockchain/Bitcoin for beginners 9: Bitcoin difficulty, target, BITS  - all you need to know
 
48:16
In this video I break the somewhat confusing and mysterious question of how exactly the block difficulty is defined, represented and updated. There is a simplification/misconception that the requirement is just to find a hash with a required number of leading zeros in hex. This is not the case, it's a little more intricate than that.... I show some examples of real blocks - in particular focusing on the genesis block, and how import it is for initializing the difficulty of mining a block. I clarify the relationship between BITS (in the block header) difficulty, and the actual 256 hash target. Links Blockchain explorer https://www.smartbit.com.au/ Difficult history chart http://www.coindesk.com/data/bitcoin-mining-difficulty-time/ Hex converter http://www.binaryhexconverter.com/hex-to-decimal-converter
Views: 5255 Matt Thomas
Merkle Tree: Building Block of the Decentralized Web w/ Erin Swenson-Healey
 
30:28
Description: A Merkle tree is a tree in which every non-leaf node is labelled with the cryptographic hash of its child nodes. This presentation demonstrates a few real-world uses from P2P and Cryptoland, including trustless file sharing (BitTorrent), PDP (proof of data possession) and PoS (proof-of-space) schemes. Bio: Erin is both a jack and master of all trades, which has helped him maintain employment as a computer programmer for so, so many years. He lives in a listing, insulation-free shack of a rental in Gentrification, California with his wife and her two misbehaving rescue dogs.
Views: 44 Chadev
"How Bitcoin Protocol Works" - Andreas Antonopoulos
 
01:22:48
EXCELLENT technical lecture by Andreas Antonopoulos on how Bitcoin protocol works and how consensus is reached by the blockchain network. UCL, London 2015. THIS IS AN EXTRACT FROM ORIGINAL VIDEOCLIP THAT CAN BE FOUND HERE: https://www.youtube.com/watch?v=sE7998qfjgk
Views: 5846 Bitcoin TV
How Bitcoin Works in 5 Minutes. (Technical)
 
05:26
How does Bitcoin work? This is a question that often causes confusion. Here's a quick explanation! The basics for a new user As a new user, you can get started with Bitcoin without understanding the technical details. Once you have installed a Bitcoin wallet on your computer or mobile phone, it will generate your first Bitcoin address and you can create more whenever you need one. You can disclose your addresses to your friends so that they can pay you or vice versa. In fact, this is pretty similar to how email works, except that Bitcoin addresses should only be used once. Bitcoin Balances - block chain The block chain is a shared public ledger on which the entire Bitcoin network relies. All confirmed transactions are included in the block chain. This way, Bitcoin wallets can calculate their spendable balance and new transactions can be verified to be spending bitcoins that are actually owned by the spender. The integrity and the chronological order of the block chain are enforced with cryptography. Transactions - private keys A transaction is a transfer of value between Bitcoin wallets that gets included in the block chain. Bitcoin wallets keep a secret piece of data called a private key or seed, which is used to sign transactions, providing a mathematical proof that they have come from the owner of the wallet. The signature also prevents the transaction from being altered by anybody once it has been issued. All transactions are broadcast between users and usually begin to be confirmed by the network in the following 10 minutes, through a process called mining. Processing - mining Mining is a distributed consensus system that is used to confirm waiting transactions by including them in the block chain. It enforces a chronological order in the block chain, protects the neutrality of the network, and allows different computers to agree on the state of the system. To be confirmed, transactions must be packed in a block that fits very strict cryptographic rules that will be verified by the network. These rules prevent previous blocks from being modified because doing so would invalidate all following blocks. Mining also creates the equivalent of a competitive lottery that prevents any individual from easily adding new blocks consecutively in the block chain. This way, no individuals can control what is included in the block chain or replace parts of the block chain to roll back their own spends.
Views: 31489 Ledger Wallet
Bitcoin - Proof of work
 
10:32
An explanation of cryptographic proof-of-work protocols, which are used in various cryptographic applications and in bitcoin mining. More free lessons at: http://www.khanacademy.org/video?v=9V1bipPkCTU Video by Zulfikar Ramzan. Zulfikar Ramzan is a world-leading expert in computer security and cryptography and is currently the Chief Scientist at Sourcefire. He received his Ph.D. in computer science from MIT.
Views: 179852 Khan Academy
Bitcoin 101 - idchains - Part 1 - The Basics Of A Bitcoin-Based Global Identity System
 
23:16
idchains - The Face of Identity: 2015 might just be the year of identity. Numerous global projects have stumbled at the point of identity, and billions suffer from inability to invest and maintain their own identities. Corrupt and politicized governments are not often the best answer. But they have traditionally been the only option. Combining the oldest and newest technologies of identity (face recognition and bitcoin), James D’Angelo provides an ultra simple, yet endlessly robust scheme for tackling the problem. In this video James D'Angelo presents the problem, design goals and the first steps of implementation with the technology. Future videos will dive deeper into the philosophy, logic, use cases, implementations as well as providing more robust solutions for the technology, incorporating opcode return, merkle roots and merkle trees, etc. Links & Python code mentioned in the video: http://worldbitcoinnetwork.com/myface.jpg http://worldbitcoinnetwork.com/eyedcode.zip (python 2.7 code) https://blockchain.info/address/1ojcEjDnTZYhWtgCD1PHMKTTjciyVCEyF Follow me on Twitter @JamesGDAngelo Public and private keys mentioned in video My Photo’s Public Address: 1ojcEjDnTZYhWtgCD1PHMKTTjciyVCEyF My Photo's "Private" Key 8908861a194a54b8c59bd2bf8b51c4d0f0860978728533e8fd94c756723e7a6f Target’s Public (Confirmation) Address: 17majtRMjCjpSCasbXFxWiHWAmzLTSdtga Thanks to Conner Davidson @ConflictOp for his help Thanks to John Clippinger and the team at Intrinsic. This video is dedicated the loving memory of my mother Anne Abigail D'Angelo Jan 7, 1938 - July 10, 2015. No one has ever been more willing to pick up the phone and listen any time of day or night than her. I miss you mom. Donations appreciated 1javsf8GNsudLaDue3dXkKzjtGM8NagQe
Views: 17755 CRI
What is a Bitcoin Node? - Step by Step Explanation
 
05:47
What is A Bitcoin Node. Step by Step Explanation https://blockgeeks.com/ The bitcoin network consists of a network of nodes, which are just computers or servers running the Bitcoin software. The code ensures the nodes can find and establish connection with other nodes and hence form a network that is used by the various nodes to transfer information, like transactions, blocks and other data. Through this web of interconnecting nodes, bitcoin can send digital cash securely through the network. The underlying bitcoin code implements the bitcoin protocol. So how does a new node join the bitcoin network? First it must discover at least one peer to connect to and then it can get a list of other peers from that initial peer. There are a few methods a node can use to connect to its first peer. The bitcoin client contains a hardcoded list of well known DNS servers which can return a list of ip addresses of bitcoin nodes. Alternatively, the bitcoin client can be given a static ip address of a peer if one is known. You can pass this ip address as a parameter when starting the bitcoin client software through the command line. It’s important to note that bitcoin’s network topology is not geographically defined, so the physical location of the nodes in relation to one another is irrelevant.This means a node can find and connect to any other node regardless of where it is in the world. Once a node has the ip address of a peer, it then goes through an initial handshake to establish a connection with a remote node. First the local node will send a version message to the peer which contains some basic information about itself. This will always be the first message sent by any peer to another peer. The remote peer receiving the message will examine if the sender’s version is compatible with its own version. If it is, it will acknowledge the version message and establish a connection by sending a “version acknowledgment” message, which consists only of a message header with the command string “verack”. Once a node establishes connections with one or more peers, it will exchange some information with these peers. For example, nodes can exchange ip addr of their connected peers, so each node can maintain a list of peers that it can use to re-establish connection in the future since nodes can leave and join the network at anytime. A Node can also ask its peers what the length of their local copy of the blockchain is. It can then determine if it’s own copy of the blockchain is missing any blocks, and if so, can ask its peers to send the missing blocks. Of course it can also send blocks to other nodes who do not have as much data as itself. Let’s take a closer look at the various nodes in the network. Although all the nodes participate in the network, they have different roles depending on the functionalities they want to support. There are 4 major functions: routing, storage, mining and wallet services. The bitcoin core client implementation in c++ has all four of these functionalities. Routing is the bare minimum functionality a node must support in order to participate in the bitcoin network. It contains the functionality to discover and connect to other peers in the network and it also validates and propagates transactions and blocks through the network. It serves the purpose of keeping the network connection alive and passing information through the network. A node is called a full blockchain node if it stores a local copy of the entire blockchain database. A full node can autonomously and authoritatively verify any transactions without any external references. With a full node you get complete independence and freedom from central authority at the cost of hardware storage space. A mining node serve the special purpose of creating a new block to add to the blockchain. Mining nodes runs special mining software in order to solve a cryptographic puzzle to win mining rewards. They serve the purpose of adding new transactions into the blockchain. To learn more visit us at blockgeeks.com
Views: 1629 Blockgeeks
The Merkle - How to make money with Bitcoin - The Merkle 👈 💰🙌 🤑
 
05:10
Free To Join, Get Rich http://egood.odgi.net/MakeMillionsWit... 👈 💰🙌 🤑 XXXXXXXXXXXXXXXXXXXXXXXXXXX I want to give special thanks to The Merkle for releasing How to make money with Bitcoin. Here are some of my other favorite youtubers and their videos! Bitcoin Basics (Part 1) - "Explained For Beginners" Bitcoin - I got SCAMMED For $10,000 Bitcoin For Beginners - Learn How To Mine Bitcoin ! - Part 1 How Bitcoin Works in 5 Minutes (Technical) How Kyle Turned $480 into $50,000+ Trading Bitcoin How Does BitCoin Work? How To Make Money With Bitcoin | Buy Low Sell High How to Buy Bitcoin for Beginners How to Make Money with Bitcoin and the Blockchain The Best Way to MAKE MONEY WITH BITCOIN in 2017! Bitcoin investors suing over losses 13 Ways to Earn Bitcoin Online How to get free Bitcoins [REAL NO SCAM] What Is Bitcoin - A Simple Explanation How To Make Money With Bitcoin 2016 - The First RETAIL Bitcoin and Ethereum Mining Contracts! FULL STORY: Bitcoin How I make money mining bitcoins The Bitcoin Life Magic Money The Bitcoin Revolution Documentary "How To Make Money" With $50 in BITCOIN in 2017! "No Mining" ...... How to Earn Money Through Localbitcoin - Bank of Community.com Chris Dunn Keder Cormier MrJayBusch CuriousInventor Chris Dunn BrainStuff - HowStuffWorks Quantech Beginning Stock Trader Korey Rowe TechCashHouse Fox Business Amanda B. Johnson DewClarke Zebpay Bitcoin Exchange Crypto Mining 16x9onglobal CNNMoney Matt Imperio Deacon Tony Williams Bitcoin Bank Of Community TV Channel Take a look at The Merkle stats and you'll understand why I am a fan. Video Url: https://www.youtube.com/watch?v=4NL9BosO2iQ Video Title: How to make money with Bitcoin Username: The Merkle Subscribers: 1K Views: 58,430 views
Views: 21 Shonna Bowlin