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ep 15: Say "I love you" on the Blockchain - with Coinbin and Smartbit
 
20:39
In this 2nd video about the OP_RETURN statement I show you how you can use this field to create your own transaction and put a message in HEX format in the OP_RETURN statement. The message then joins the Blockchain and can be seen forever…. Go to coinb.in or download the source and run it locally from here https://www.dropbox.com/s/jlwt46kn4278txc/coinbin-master.zip?dl=0 (Just unzip it and open the index.html) -Fund a small amount of bitcoin into that wallet -Go to “New Transaction” -Enter your coinbin bitcoin address in the top and click to load your unspent transaction output - UTX0 -Click advanced options -Check the box to allow null data to be store in the OP_RETURN statement -Create one output that pays some bitcoin back to yourself use the same coinbin bitcoin address -coinbin will calculate the appropriate transaction fee Go to https://sites.google.com/site/nathanlexwww/tools/utf8-convert and convert your message into hexadecimal characters -Create a new output in your bitcoin transaction with ZERO amount and enter the hexadecimal string as the address for that output -Hit submit -Copy the generated transaction string into the Verify tab Ensure it looks OK -Copy the same string into the SIGN tab -Go to “Wallet” - Keys and copy your private key into the private key field in the SIGN tab -Copy the generated SIGNED transaction into the Broadcast tab -Hit submit -Note down the transaction hash id -Wait some time….. -Go to https://www.smartbit.com.au Search for your transaction hash there -After some time, you will see the transaction confirmed and you can search your message forever. Links: Awesome wallet to help you create your own transactions including OP_RETURN messages https://coinb.in OP_RETURN searchable blockchain explorer https://www.smartbit.com.au Very handy text to hexadecimal converter https://sites.google.com/site/nathanlexwww/tools/utf8-convert Please let me know if you have any questions.
Views: 2187 Matt Thomas
Digital Signatures and Signing transactions explained
 
08:04
You need to have an understanding of Encryption for this video to make sense 13uJjYF12aRVdwaiTmALx5XDfguQ9MnYtK
Views: 1799 Keifer Kif
Blockchain - How To Verify A Bitcoin Transaction And Get Your Hash ID
 
02:17
For more tips like these visit http://bodymindsuccess.com/bitcoin or subscribe to our channel
Views: 46816 Crypto Currency Wealth
How transactions are verified in Bitcoin Blockchain - Longest chain rule explained
 
05:08
How transactions are verified in Bitcoin Blockchain - Longest chain rule explained Watch our earlier Blockchain videos Blockchain Simplified: https://www.youtube.com/watch?v=LWAYveDotb0&t=1s Blockchain Technology explained: https://www.youtube.com/watch?v=gVLIentRlIk&t=1s Have you wondered how transaction get approved in a Bitcoin block chain? Why you need to wait for 3 to 6 confirmations for the transactions to appear in your wallet. This video attempts to explain how a Bitcoin transaction is approved and the process behind it. Let’s assume Mr. Gobish transferred Bitcoin worth 100$ from one crypto exchange to another. Once he does the transfer, the transaction message is sent to the network and passed around all the network participants which are also called nodes. This is added to the transaction pool. Currently, the transaction is in an ‘unconfirmed’ state. All the transactions in the transaction pool will be in an unconfirmed status. Now we will understand who is a miner. In simple words, those who validate new transactions and record them on the global ledger of Blockchain are called miners and this activity is called mining. To make it simple, let’s assume there are currently 3 miners who are trying to confirm the transactions from transaction pool including Gobish’s transaction of $ 100. Normally miners will select those transactions which will generate a higher transaction fees for them. Currently, the numbers of confirmed blocks in the Blockchain public ledger is 998. Once the miners identify that the 998th block is a valid block they will try to create a candidate block by adding unconfirmed transactions from the transaction pool. Now these miners are trying to add the 999th block. To add the blocks they have to solve a complex mathematical problem. This is known as Proof of Work (POW). Let’s assume all the 3 miners were able to solve this problem and have Proof of Work. Now we have 3 different candidate blocks, let’s call them 999 A, 999B and 999C Now which of these block will form part of the valid block will depend upon the longest chain rule. Let’s understand what is longest chain rule is. Now there are other miners who are trying to create other valid blocks and based upon the speed by which a block is created others miners will keep on adding their blocks on top of the earlier blocks. Here in this case Minor C had a better processor which was able to create a block faster than the miner A and B and hence new blocks were created on top of the block 999C. Now the longest chain is the one created by 999C and it will be keep on adding other blocks like 1000, 1001 and so on as miner C solved the proof of work before miner A and B. So what happens to the blocks 999A and 999B? They have to create the Proof of Work again with new set of transactions from the transaction base. Each confirmations represent adding each block. Each confirmation will take on an average of around 10 minutes or more per block. Applying the longest chain rule and proof of work, unconfirmed transaction will become a confirmed transaction and added to the Blockchain ledger Once the blocks are added miner will receive a transactions fees and block fees which will be the new Bitcoin created as an incentive for approving the transactions. Block rewards will be reducing every year and in the end only transaction fees will be there as new Bitcoins will not be created. We will get in to more details about mining and the incentives in our subsequent video.
Views: 3813 FINMAESTRO
Bitcoin - Digital Signatures
 
09:48
A high-level explanation of digital signature schemes, which are a fundamental building block in many cryptographic protocols. More free lessons at: http://www.khanacademy.org/video?v=Aq3a-_O2NcI 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: 137553 Khan Academy
Bitcoin Transaction Details - Part 1
 
15:47
A look at how a transaction is constructed This video is part of a larger online course, "From Barter to Bitcoin: Society, Technology and the Future of Money" run by Prof. Bill Maurer and Prof. Donald J. Patterson In addition to the video on YouTube there is a variety of other content available to students enrolled in the class. "In 2008, a person calling himself or herself or themselves Satoshi Nakamoto released a paper suggesting a system for an anonymous, peer-to-peer alternative money. Bitcoin was born. Although not the first digital currency ever proposed, nor the first challenger to fiat money, bitcoin is the first to have captured the broad imagination of speculators, coders, regulators, criminals and the mass media. This course puts Bitcoin in context: how do we understand money as a social, political and technological phenomenon? From discussions of ancient transactions to the rise of state-issued currencies, we will explore the social and technical aspects of bitcoin, its predecessors and potential successors, and how its features echo aspects of many different historical transaction systems. No prior knowledge of economics or computing is required. There is little academic writing on bitcoin. And this may be the first truly academic class on the topic. We want to put bitcoin in a wider perspective, to reflect on what it means for society, politics and economics, as well as how it helps us think about money both a social and a technical phenomenon. This class is not an advanced seminar on bitcoin--we will not be delving deeply into the inner workings of the system, but instead providing a bird's-eye overview with enough technical detail for you to be able to put media stories, hype and hope around bitcoin in perspective. Similarly, this is not a class in monetary economics--we won't go too deeply into monetary theory or policy, the money supply, or inflation. Instead the class invites you to think more deeply about one of the oldest systems of technology on the planet, and most ubiquitous: money, whether coin, cash, credit card or cryptocurrency, we humans have been making money for most of the past 10,000 years. How we do so in the future is a question bitcoin just maybe helps us answer."
Views: 31406 djp3
How to do a Multisignature Bitcoin Transaction
 
07:49
How to use public and private keys to create a multi-signature address and then spend bitcoin from that address.
Views: 8604 Alex Millar
Bitcoin from the Command Line - Sending Bitcoin Transactions Programmatically with Javascript
 
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One of the common complaints with Bitcoin is that it’s pretty hard to get started, and there’s a lot of overhead to making accounts and sending transactions. So I want to show everyone a really simple workflow that I’ve been using to interact with the Bitcoin blockchain from my command line using Javascript. This isn’t a workflow that I would recommend for long-term storage (though there isn’t anything wrong with it necessarily, I still would recommend hardware wallets for long-term crypto-asset storage) but it is a good workflow for hacking around, sending money and building apps. Video Notes: https://gist.github.com/AlwaysBCoding/4af36dfc7c6e7d11c0af1621b695a944 Crypto Donation Links: BTC: 1HewuvpGP1fwprdcg2yru5ss28tGCo4wg8 ETH: 0xC46CDe805aCC8e7507E53E36486C7D8600559d65 XMR: 42HvHqtwg2dcZqDfLZjK8Xc8LyFKN7i3XCipbVSFDJLVGsdUN5pT3e7LExz9QTaGzdGdrEohXzvkeFmdZK1MPGX92xqftUn
Views: 4340 Decypher Media
HOW TO ACCELERATE YOUR UNCONFIRMED BTC TRANSACTIONS
 
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Hi guys and welcome to another episode of Crypto Chatbox In this episode we are going to talk About Steps I take that Kind of Help Speed Up Unconfirmed BTC Transactions. Good Luck Guys!!! ******** MY DISCLAIMER ******** 1) I'm not a financial advisor even thou I am a Financial Manager and have nearly 2 decades in the Financial Industry. 2) EVERY investment is risky (EVERY). 3) You are more than welcome to join me and even follow my foot steps but I am not asking you or telling you what to invest on and/or how much. 4) Do your own research and Make your own decisions, Don't let anyone else influence your decision. 5) Diversify, Diversify, Diversify 6) ALWAYS LIKE & SUBSCRIBE TO THE CHANNEL (If you have not done it yet) KEEP IN MIND THAT I HAVE MY OWN MONEY INVESTED IN EACH PROGRAM THAT I PRESENT TO YOU! I WILL "NEVER" SHOW YOU AN INVESTMENT THAT I WOULDN'T INVEST MYSELF IN!!! IF YOU WANT TO JOIN ME IN MY QUEST TO ACHIEVE FINANCIAL FREEDOM AND WOULD LIKE TO MIRROR MY STEPS, THEN THESE ARE MY PICKS THE NEW KIDS ON THE BLOCK DON'T MISS OUT ON THE NEXT REGALCOIN LEGEND COIN = https://legendcoin.co/?ref=qnrat HP TOKEN = REGISTER FOR FREE & GET 10 HPT TOKENS FREE https://hptoken.co/r=pUq0m3SRnDWQph3 STENEUM - https://steneum.com/?aff=963 UNIQUE LENDING PROGRAM | COIN WILL APPRECIATE LIKE CRAZY + COIN EXCHANGE TOO GOLDGATE, I THINK I LOVE THIS ONE = https://goldgate.io/bggDRmNuBkiEaRX5m8 VERY GOOD FOR NEW INVESTORS AND VETERANS TOO. THIS IS A HYBRID LENDING PROGRAM UNIXCOIN - http://wake.unixcoin.com/register?ref... THE FAIREST OF ALL ICOS PERFECT FOR NEW INVESTORS NUMIV COIN = https://numivcoin.com/?r=cryptochatbox WATCH MY REVIEW = https://youtu.be/V5AoZaRuO58 LENDCONNECT COIN = http://www.dashboard.lendconnect.io/r... ERC-20 TOKENS WATCH MY VIDEO TO LEARN TO USE MYETHERWALLET.COM Refer to this link = https://youtu.be/6NgGkcFQUoU (minute 4:30) FUND YOUR ETHER WALLET ***** MY BLUE CHIPS / 5 STARS PICKS **** IDEACOIN https://ico.ideacoin.co/invite/crypto... CRYPTOXCHANGER = https://cryptoxchanger.net/?r=cryptoc... YES US CITIZENS "CAN" BUY THE COINS WATCH ME BUYING IT LIVE = https://youtu.be/eMEeE0Msjas UCOIN CASH = https://ucoincash.co/ref/cryptochatbox WATCH ME BUYING IT LIVE = https://youtu.be/eMEeE0Msjas DAVORCOIN = https://davor.io/Account/Registration... LENDING STARTED / I SUGGEST YOU WAIT FOR BETTER VALUE OF THE COIN. FALCON COIN = https://dashboard.falconcoin.co/refer... HEXTRACOIN = https://hextracoin.co/register?referr... REGALCOIN = https://regalcoin.co/ref/CRYPTOPOLIS GOLDREWARD = https://goldreward.io/join/cryptochatbox My Binary Systems: POLYNETWORK = https://ico.polynetwork.org/signup/cr... HYDROCOIN = https://hydrocoin.io/link/cryptochatbox USITECH You need to Register a Free Account first to Participate on the ICO = https://6b9df399.usitech-int.com And of course BITCONNECT = https://bitconnect.co/?ref=freeatlast *** Message me or comment below if you need help getting into any of this opportunities or if there anything you would like me to review for you!!! Don't forget to LIKE / SHARE / SUBSCRIBE (hit the NOTIFICATION bell to get notified on our new videos)
Views: 7626 Crypto ChatBox
Creating pre-signed bitcoin transactions
 
08:48
In this video, I show how to create a pre-signed transaction that can be broadcast to the bitcoin network at a later time. Useful in situations where you would need a send a transaction but wouldn't have access to your wallet either for security or convenience reasons.
Views: 1515 Bitcoin Hacks
Bitcoin Transaction Details - Part 2
 
19:56
A look at the details of the transactions... it gets a little technical, put on your seatbelts. This video is part of a larger online course, "From Barter to Bitcoin: Society, Technology and the Future of Money" run by Prof. Bill Maurer and Prof. Donald J. Patterson In addition to the video on YouTube there is a variety of other content available to students enrolled in the class. "In 2008, a person calling himself or herself or themselves Satoshi Nakamoto released a paper suggesting a system for an anonymous, peer-to-peer alternative money. Bitcoin was born. Although not the first digital currency ever proposed, nor the first challenger to fiat money, bitcoin is the first to have captured the broad imagination of speculators, coders, regulators, criminals and the mass media. This course puts Bitcoin in context: how do we understand money as a social, political and technological phenomenon? From discussions of ancient transactions to the rise of state-issued currencies, we will explore the social and technical aspects of bitcoin, its predecessors and potential successors, and how its features echo aspects of many different historical transaction systems. No prior knowledge of economics or computing is required. There is little academic writing on bitcoin. And this may be the first truly academic class on the topic. We want to put bitcoin in a wider perspective, to reflect on what it means for society, politics and economics, as well as how it helps us think about money both a social and a technical phenomenon. This class is not an advanced seminar on bitcoin--we will not be delving deeply into the inner workings of the system, but instead providing a bird's-eye overview with enough technical detail for you to be able to put media stories, hype and hope around bitcoin in perspective. Similarly, this is not a class in monetary economics--we won't go too deeply into monetary theory or policy, the money supply, or inflation. Instead the class invites you to think more deeply about one of the oldest systems of technology on the planet, and most ubiquitous: money, whether coin, cash, credit card or cryptocurrency, we humans have been making money for most of the past 10,000 years. How we do so in the future is a question bitcoin just maybe helps us answer."
Views: 11972 djp3
Bitcoin Cash Transactions with no Internet
 
00:25
Cointext.io let’s you send and receive Bitcoin Cash over SMS. So even when your internet is down you can still send transactions with a simple text message.
Tutorial: Build a real-time visualization of Bitcoin transactions with React Native in 10 minutes
 
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We're building an app that shows the real-time value of Bitcoin, Etherum, and Litecoin as judged by the Coinbase GDAXexchange. We'll connect with a Websocket, listen for transaction messages, and draw a pretty picture with some jumping numbers. The app updates every time a new trade occurs on GDAX and shows transaction volume per every 3-second interval. Article: https://school.shoutem.com/lectures/tutorial-bitcoin-transactions-react-native/
Views: 1162 Shoutem
Tracking Bitcoin Transactions on the Blockchain - SANS DFIR Summit 2017
 
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Bitcoins are a commonly-used currency among cyber criminals for exchanging goods and services and receiving payments from ransomware. While cryptocurrency claims to promote anonymity, the nature of the blockchain’s public ledger means that criminal activities can be traced and correlated. This presentation will cover a brief high-level overview of how transactions on the blockchain work and will focus on how to apply this knowledge in order to both manually and automatically map out transactions, associate bitcoin addresses, and identify potential cybercriminal-owned bitcoin wallets with the goal of providing context to the scale and duration of a campaign impacting your enterprise. Examples will include identifying a Locky affiliate’s infrastructure, attributing the Shark/Atom ransomware, and identifying “bitcoin exchanges” on the blockchain. Kevin Perlow, Associate, Booz Allen Hamilton
Speed Up My Bitcoin Transaction (Tutorial)
 
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Speed Up My Bitcoin Transaction (Tutorial) Step 1: Find your bitcoin transaction ID or hash ID Use https://www.Blockchain.info and search it up and copy it! Step 2: Paste your Transaction ID into http://www.speedupmybitcointransaction.com and click accelerate now only 1 time needed they got it after that! Step 3: Find them on facebook here and message them to help you with your transaction and paste your Transaction ID into their messenger and wait for a response. Step 4: Sit back and wait for your transaction to be confirmed and bless Them if you want to afterward sow into their wallet for helping our community or shout them out at least too. God Bless Inbox me for help if necessary.
Views: 283 silaskingiv
*Message to Governments and Banks about Bitcoin - Buy it - Help your clients and citizens!
 
01:30
My BTC Address/donations heartily welcomed: 165EKHw3CLR5Zeny6RGpvG3PSKNv3RJoYi Coinbase Affiliate https://www.coinbase.com/join/57f7ca5... Help grow the bitcoin community and earn free bitcoin. Using bitcoin is more fun with friends! You can invite your friends by sharing the provided link. Once your friend buys or sells $100 of bitcoin or more, you will both get $10 of free bitcoin. It's not to late to own one bitcoin. Nitrogen Sports: The Future of Sports & eSports Betting (adult only) - https://nitrogensports.eu/r/727176 Uber Invite Code: (I get $200 if you do give $75 rides) PD1HPB7MUE
Views: 99 Bitcoin Globe
Invest In Bitcoin?  The Market Message with Bill Valentine, CFA
 
05:11
Bitcoin is all the rage. Everyone is watching to see if this rogue, digital currency will become a bona fide alternative to dollar based transactions. Whether it will or will not, we don't know. What we do know is if and how you should invest in Bitcoin to make huge amounts of money. Bill Valentine, CFA is the President and Portfolio Manager at Valentine Ventures, LLC, a wealth management firm located in Bend, Oregon. A financial educator, Bill informs and entertains his followers via The Weekly Update, an email newsletter. Visit http://valentineventures.com/blog to view more of our content and sign up for weekly email notification of our latest communiques.
How to Store A Text Message on the Ethereum Blockchain - Censorship Resistant
 
05:40
In this short tutorial I demonstrate how to store hex data on the ethereum blockchain by signing an 0 ether transaction. This is a great first step for people to share texts and avoid censorship. As soon as a transaction is broadcast to the ethereum blockchain it cannot be tampered with. This is a level of trust that is not seen anywhere at the moment. There are many other blockchain platforms that allow this but we are only looking at the Ethereum Blockchain. A chinese student used this method to avoid being censored by the chinese government. https://cryptobulls.info/chinese-student-censorship-ethereum https://cryptobulls.info/store-text-message-ethereum-blockchain-censorship-resistant Text to Hex: http://www.online-toolz.com/tools/text-hex-convertor.php
Views: 159 cryptobulls
Getting the ECDSA Z Value from a Bitcoin Single Input Transaction
 
06:43
In this video I demonstrate getting the ECDSA Z value from a bitcoin transaction with only one input. I also show the R and S values. The ECDSA R, S and Z values are used throughout the many layers of bitcoin to validate a transaction, The Z value is also sometimes referred to as the signed message. Transactions that don't contain valid inputs can be safely ignored, and the Z value is one of the properties that is used to check validity. This video shows me dissecting a very basic transaction with only 1 input and 1 output. The urls I show in this video are https://2coin.org/index.html?txid=bf474b96908ba7769120b2e8f2bfcbd2deca80c99b576b4b63bf18fb69e3d242 https://en.bitcoin.it/wiki/Protocol_documentation#tx https://2coin.org/doublesha256.html
Views: 2854 seanwasere ytbe
Messages and Transactions in Ethereum | White Paper
 
05:26
The term "transaction" is used in Ethereum to refer to the signed data package that stores a message to be sent from an externally owned account. Contracts have the ability to send "messages" to other contracts. Messages are virtual objects that are never serialized and exist only in the Ethereum execution environment.
Quick Bitcoin transaction with BitLox and iOS mobile app
 
04:29
Sending a transaction with the mobile app for iOS BitLox. It's fast and simple!
Views: 1704 BitLox
How to Sign a Transaction
 
00:15
Views: 31 KBCCOP
BitLox short message signing
 
04:06
How to sign short text messages using the private keys embedded in your BitLox. Perfect for authenticating transactions and your identity.
Views: 200 BitLox
BitVault® Secure Messaging Demo - EOT enabled for all transactions from 1 Nov 2017
 
03:06
BitVault® Secure Messaging The BitVault secure messaging is implemented using a private Blockchain. A Bitcoin address from your Bitcoin Vault wallets can be used to send and receive secure messages. When sending a message, scan the QR code or copy and paste the address where you want to send the message. The security features of the BitVault will require you to scan your fingerprint, scan your iris and scan your NFC card before a message can be sent. In order to receive a message, you will need to share your Bitcoin Vault wallet where you want to receive your message to the sender through the QR code or sharing the address. Your BitVault will notify you whenever you receive a new secure message. Secure messaging also allows for transfer of photos or videos directly from your BitVault across the private Blockchain. Once the messages are read and downloaded, it will be deleted from the Blockchain and it will be up to the user to decide to keep it on the local BitVault storage. This demonstration used Bitcoin, however, EOT (more info - http://encryptionofthings.org/) will be used in the BitVault® from 1 November 2017 Order yours today - https://swissbankinyourpocket.com/product/bitvault/ -~-~~-~~~-~~-~- Please watch: "How to Install your Embedded Vault" https://www.youtube.com/watch?v=nw9Pd5ujy5k -~-~~-~~~-~~-~-
Views: 302 Bit Media
Bitcoin: How to Create a Raw Transaction
 
06:12
Step by step guide on creating a raw transaction with bitcoin core client. createrawtransaction '[{"txid":"", "vout":}]' '{"1anyAddress":0.01,"1changeAddress":0.05}' signrawtransaction 'hash' '[{"txid":"", "vout":n,"scriptPubKey":""}]' '["privatekey"]'
Views: 8299 m1xolyd1an
Blockchain/Bitcoin for beginners 3: public/private keys, signatures... and first ever transaction
 
36:25
Detailed overview of public/private key encryption and live demo of exactly how digital signatures work on Mac, combining public and private keys and hash functions. Welcome to episode 3 of my series on Blockchain/Bitcoin. I'm joined once again by my girlfriend Nadisha who is my classroom pupil... I build on the hash function concepts from the previous episode and explain the basic concepts public and private keys and how to use them to create digital signatures - a key part of the bitcoin infrastructure. We demonstrate in a Mac terminal how you can generate your own keys and encrypt and decrypt and sign your own resources - learning by doing always works. We touch on bitcoin addresses, what they represent and how they are created. Finally I go back for a refresh of the bitcoin blockchain browser and look at the first ever bitcoin transaction in the "Genesis Block" to show what a real bitcoin address 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. Blockchain introduction https://youtu.be/xwA2TkcAQgQ 2. Hashing, blockchain networks and look at blockchain browser https://youtu.be/oxwMnqFNq9M SAMPLE COMMANDS: You will need to use your own document - pick any document, obviously your hash values will be different to mine. Also I had to use (right arrow) - since comments do not allow "chevron" symbols # EXAMPLE 1: # generate public and private keys openssl genrsa -out mykey 2048; cp mykey privatekey; openssl rsa -in mykey -pubout -out publickey; rm mike #encrypt with public key echo “the cat sat on the mat” | openssl rsautl -encrypt -pubin -inkey publicly (right arrow) cipher.txt # show the garbage cat cipher.txt # decrypt with private key - The cat sat on the mat cat cipher.txt | openssl rsautl -decrypt -inkey privately # EXAMPLE 2: Sign Alice in wonderland #check the SHA256 hash of the document to send - d9db7b8984d808b2821070cc6cc76e4415229d3356452b2a0f06ec3608f13b6c shasum -a 256 alice-in-wonderland.txt | cut -d" " -f1 # create a text file called signature which hashes the document and encrypts with private key shasum -a 256 alice-in-wonderland.txt | cut -d" " -f1 | openssl rsautl -inkey privatekey -sign (right arrow) signature # wrap the signature up with the public key, the document and the signature and send it … we just copy to another folder tar -cvf alice.tar signature alice-in-wonderland.txt publickey;mkdir -p inbox;cp alice.tar inbox;cd inbox;tar -xvf alice.tar # inspect the public key and verify with the sender that it belongs to the sender cat publickey #decrypt the signature with the received public key - d9db7b8984d808b2821070cc6cc76e4415229d3356452b2a0f06ec3608f13b6c openssl rsautl -inkey publickey -pubin -in signature # hash the received document - d9db7b8984d808b2821070cc6cc76e4415229d3356452b2a0f06ec3608f13b6c shasum -a 256 alice-in-wonderland.txt | cut -d" " -f1 # if they are both the same then the document cannot have been changed since it was signed by the genuine owner of the # private key corresponding to the public key
Views: 18100 Matt Thomas
Bitcoin Transaction Malleability Theory In Practice Demo
 
09:58
This is a demo of our presentation "Bitcion Transaction Malleability Theory in Practice". The demo simulates a trading website that is vulnerable to Transaction Malleability, by simply not following the transaction correctly. The attacker can exploit this vulnerability to receive more coins to his personal wallet than he originally should have in the first place. This demo was created by Ben Hayak (@benhayak) Rami Kogan Daniel Chechik (@danielchechik)
Views: 1402 daniel chechik
Blockchain tutorial 6: Digital signature
 
04:48
This is part 6 of the Blockchain tutorial explaining what a digital signature is. 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: 12949 Mobilefish.com
Getting the ECDSA Z Value from a Bitcoin Multiple Input Transaction
 
09:09
In this video I demonstrate getting the ECDSA Z value from a bitcoin transaction with 2 inputs. I also show the R and S values. The ECDSA R, S and Z values are used throughout the many layers of bitcoin to validate a transaction. The Z value is also sometimes referred to as the signed message. Transactions that don't contain valid inputs can be safely ignored and the Z value is one of the properties that is used during the transaction validation process. The urls I show in this video are https://2coin.org/index.html?txid=9ec4bc49e828d924af1d1029cacf709431abbde46d59554b62bc270e3b29c4b1 https://2coin.org/pubkeyToHash160.html https://2coin.org/doublesha256.html
Views: 1189 seanwasere ytbe
IOTA tutorial 10: Transaction and Bundle
 
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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 10 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 squares in the Tangle represents transactions and each NEW transaction should reference transactions which have no other transactions referencing them. These non referenced transactions are called tips (tip 0 and tip 1). Each transaction consists of a bundle of transactions. An example of an IOTA transaction where 3 IOTA’s are transferred from Alice's address to Bob's address: https://www.mobilefish.com/download/iota/transactions_in_bundle_example1.txt A transaction consists of a bundle of transactions: currentIndex 0 refers to transaction 0, currentIndex 1 refers to transaction 1, etc.. All these transactions have the same bundle hash. All transactions in the same bundle should be treated as an atomic unit. It means that either all transactions of a bundle are confirmed, or none of them are confirmed. Every transaction in the bundle requires it own PoW, see the different nonces in the transactions. There can be 3 different types of transactions inside a bundle: - Output transactions Transactions where IOTA’s are send to one or multiple addresses. The IOTA light wallet can only send to one address. These transactions are easily recognised because the transaction value is always greater than 0 and the address does not belong the sender. - Input transactions There are two types of input transactions: * Input transactions where the value is negative. These are the transactions where the complete balance from that address is spent. * Input transactions where the value is greater than 0. These are the transactions where unspent/not used IOTA’s are send to a new change address in the senders wallet. - Meta transactions Zero value transactions are meta transactions. The signatureMessageFragment of these transactions could either hold a signature or a message fragment. Transaction examples: https://www.mobilefish.com/download/iota/transactions_in_bundle_example1.txt https://www.mobilefish.com/download/iota/transactions_in_bundle_example2.txt https://www.mobilefish.com/download/iota/transactions_in_bundle_example3.txt https://www.mobilefish.com/download/iota/transactions_in_bundle_example5.txt By increasing the security level you increase the key size, meaning you increase the private key size. Depending on the key size, this signature is fragmented and stored in 1, 2 or 3 transactions. Wallet 1, using security level 1, the signature is stored in 1 transaction: https://www.mobilefish.com/download/iota/transactions_in_bundle_security_level1.txt Wallet 2, using security level 2, the signature is fragmented and stored in 2 transactions: https://www.mobilefish.com/download/iota/transactions_in_bundle_security_level2.txt Wallet 3, using security level 3, the signature is fragmented and stored in 3 transactions: https://www.mobilefish.com/download/iota/transactions_in_bundle_security_level3.txt By increasing the security level you increase the signature size and thus the number of transactions needed to store the signature. IOTA signatures are larger than Bitcoin signatures due to IOTA's use of Winternitz one-time signatures to gain quantum resistance. Each single transaction inside a bundle consists of 2673 trytes and much of it is taken by the signatureMessageFragment which has a size of 2187 trytes (approx 82%). A single transaction inside a bundle requires 2673 trytes or ~1.55 kBytes. A bundle can have one transaction, for example when you attach an address to the Tangle. A bundle can have an X number of transactions. For example: Alice has a wallet (using security level 2) with address 0 to address 99 with each address having one IOTA. When Alice transfers her complete wallet balance to Bob, she creates a transaction bundle containing 201 transactions: 1 transaction to Bob, 100 transactions withdrawing 1 IOTA from each address and 100 meta transactions to store the second signature fragment. Each transaction inside the bundle requires a PoW. Let assume a PoW takes 20 seconds per transaction. Please note: This 20 sec is arbitrary chosen! In this example the total time to create the bundle, takes: 201 transactions x 20 sec / tx = 67 minutes. You can easily create a transaction bundle containing lots of transactions. However watch out for the Proof of Work. 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: 2436 Mobilefish.com
Signing and verifying messages
 
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How to sign and verify messages in Coinomi. Examples from this video that you can verify yourself: BTC address: bc1qwcsp3xfzgk6ugc25xehxj20fekvjnnk8vh4h99 Message: Register this address Signature: IKSFVBfQo+DqG/ouFWuvNVqF/+uxj631PR+vnCaG5ShSQosaopZjB6sYiBGR64WKDrLzZ1ysZ9eR8+XZSbskUV8= DOGE address: D5fS8Puy3eRpEi2sSxkW715Fh9FHKU2ddb Message: Check out my address! Signature: H9mRw0TWcZ7nCopWZ/GO8vbwm5/rDNR9vytDPbRiQv+LNLXWWcjRR04cLpkYtNiYBHiK8fKuG2qaz+JWb9fCPg8= Get it for Android: https://play.google.com/store/apps/details?id=com.coinomi.wallet Get it for iOS: https://itunes.apple.com/us/app/coinomi-wallet/id1333588809 Coinomi official website: https://coinomi.com Twitter: https://twitter.com/coinomiwallet Telegram: https://t.me/coinomi_official
Views: 374 Coinomi
The Bitcoin and Blockchain Technology Explained
 
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A block chain is a transaction database shared by all nodes participating in a system based on the Bitcoin protocol. A full copy of a currency's block chain contains every transaction ever executed in the currency. With this information, one can find out how much value belonged to each address at any point in history. ------------------------------------------------------------------- BUY BITCOIN SAFELY HERE: http://bit.ly/BuyBitcoinNow ------------------------------------------------------------------- REGISTER FOR A COINBASE ACCOUNT: http://bit.ly/CoinbaseBitcoinSignup ------------------------------------------------------------------- Every block contains a hash of the previous block. This has the effect of creating a chain of blocks from the genesis block to the current block. Each block is guaranteed to come after the previous block chronologically because the previous block's hash would otherwise not be known. Each block is also computationally impractical to modify once it has been in the chain for a while because every block after it would also have to be regenerated. These properties are what make double-spending of bitcoins very difficult. The block chain is the main innovation of Bitcoin. Honest generators only build onto a block (by referencing it in blocks they create) if it is the latest block in the longest valid chain. "Length" is calculated as total combined difficulty of that chain, not number of blocks, though this distinction is only important in the context of a few potential attacks. A chain is valid if all of the blocks and transactions within it are valid, and only if it starts with the genesis block. For any block on the chain, there is only one path to the genesis block. Coming from the genesis block, however, there can be forks. One-block forks are created from time to time when two blocks are created just a few seconds apart. When that happens, generating nodes build onto whichever one of the blocks they received first. Whichever block ends up being included in the next block becomes part of the main chain because that chain is longer. More serious forks have occurred after fixing bugs that required backward-incompatible changes. Blocks in shorter chains (or invalid chains) are not used for anything. When the bitcoin client switches to another, longer chain, all valid transactions of the blocks inside the shorter chain are re-added to the pool of queued transactions and will be included in another block. The reward for the blocks on the shorter chain will not be present in the longest chain, so they will be practically lost, which is why a network-enforced 100-block maturation time for generations exists. These blocks on the shorter chains are often called "orphan" blocks. This is because the generation transactions do not have a parent block in the longest chain, so these generation transactions show up as orphan in the listtransactions RPC call. Several pools have misinterpreted these messages and started calling their blocks "orphans". In reality, these blocks have a parent block, and might even have children. Because a block can only reference one previous block, it is impossible for two forked chains to merge. • How do Bitcoin Transactions Work? http://www.coindesk.com/information/how-do-bitcoin-transactions-work/ ------------------------------------------------------------------- DID YOU LIKE THIS VIDEO? ------------------------------------------------------------------- Enjoy this video? Click "Mark as good" and give your "LIKE". Subscribe to our channel and follow our publications. Consider making a small Bitcoin donation to this address: 3C2Ti2wegJDFw1Kp3w71Mtr9bKkhyCz8fa. ------------------------------------------------------------------- BUY BITCOIN SAFELY HERE: http://bit.ly/BuyBitcoinNow ------------------------------------------------------------------- REGISTER FOR A COINBASE ACCOUNT: http://bit.ly/CoinbaseBitcoinSignup ------------------------------------------------------------------- ------------------------------------------------------------------- Video credits ------------------------------------------------------------------- http://www.bitcoinproperly.org/ Tags: BTC Bitcoin Bit coin Altcoin Cryptocurrency Buy Bitcoin Sell Bitcoin Bitcoin trading Bitcoin value Bitcoin wallet Bitcoin blockchain Blockchain Satoshi Nakamoto Digital currency
Views: 385626 Rodrigo Henrik
Constructing a Bitcoin transaction using python - 2/5
 
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This video is for people who wants to use (almost) raw python code to Constructing a Bitcoin transaction. If you loved this video, show me the love! BTC address: 1LxhkGzGu6q2LSfAGuH2DNBChmLhHkuQzP In the previous videos I've explained how to connect to the bitcoin network, as well as how to use private and public keys. I suggest that you'll check out these videos: https://www.youtube.com/playlist?list=PLH4m2oS2ratfeNpZAoVwPlQqEr3HgNu7S In this video I'm using the external libraries: ecdsa and base58 My blog: http://zeltsinger.com/ You can see the complete code on github: https://github.com/Shultzi/Mybitcoin Some recommended links: Bitcoinbook - https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch02.asciidoc#transaction-aggregating Hen Shirriff's blog -http://www.righto.com/2014/02/bitcoins-hard-way-using-raw-bitcoin.html The royal fork - http://royalforkblog.github.io/ wiki - https://en.bitcoin.it/wiki/Transaction https://en.bitcoin.it/wiki/Script bitcoin.org Developer documentation -https://bitcoin.org/en/developer-documentation
Views: 2570 Shlomi Zeltsinger
Bitcoin Guide to Seting Faster Transactions for BlockChain Wallet
 
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🔧 Bitcoin Guide to Seting Faster Transactions for BlockChain Wallet. 20 May 2017 A Step by Step video guide on setting your Transaction fees for your Blockchain Wallet . With the Higher Btcoin Transacton fees, your bitcoin transactions will be processed faster by the Bitcoin Miners on the Bitcoin Blockchain RESOURCES Attend my Bitcoin Talks in Malaysia, Kuala Lumpur, KL https://goo.gl/Qjc2eE Need Profitable Bitcoin Mining opportunities? Read more at https://goo.gl/4dg7bC Enquiry on making more money and bitcoins? Send message here https://goo.gl/uD57HV Please subscribe to our Youtube Channel for more updates!
How to TOP-UP $ Balance on Rockwall Investments - Sending Bitcoin (BTC) transaction
 
03:56
I'm showing how I'm transferring $400 worth of Bitcoin (BTC) from my Bitcoin wallet on BitBay to Rockwall Investments. Rockwall Investments giving more than #FutureAdPro, #FutureNet, #DasCoin, #BitClub? To make $1000 a month (at the beginning) #online, you do not have to do anything other than buying #FUSION #service on Rockwall Investments about, which you will get to know more from my investing blog › http://janzac.com/how-to-earn-money-with-rockwall-investments/ You can also check out #ROCKWALL #INVESTMENTS page directly › https://rockwall.investments/ref/janzac Open #free #account on polish CRYPTO EXCHANGE › https://auth.bitbay.net/ref/drzachar Registration takes 90 seconds and you will be able to #BUY and #SELL #Bitcoin, #Ethereum, Bitcoin Cash, Lisk, Litecoin, Dash, Ripple, Futuro and other cryptocurrencies. SUBSCRIBE to my #YouTube channel › https://www.youtube.com/channel/UCA5ubzWL3HzXQ4q08f1ujDQ/?sub_confirmation=1 so you won't miss most exciting topics and tested (on myself) ways of #earning #money #online. Like ME on na #FaceBook › https://facebook.com/realjanzac/ and send me a private message. THANK YOU for time spent on this channel. I'm sure you will be #strongly #satisfied with the results of our cooperation. Let's keep in touch and let's move on, make money online and #CHANGE our #WORLD! Best regard Jan Contact › http://JANZAC.com/contact-janzac/ Please help me fulfill my #life #MISSION! You can read about it on my blog › http://JANZAC.com/greetings-future-investor/ Check out amazing pictures from my #TRIPS › http://janzac.com/janzac-trips/ ------------------- Legal note: Website JANZAC.COM is a personal blog about financial education and #freedom. Not an investing offer. This is an entertainment video.
Views: 1226 Jan Zac
Online Retailers Ditching Bitcoin For Dash Because Of Long Bitcoin Transaction Times!
 
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Hello WrenchGang, I am able to be reached by email which can be found on our "About" Page on Youtube located at the link below https://www.youtube.com/cryptonews/about I can also be contacted by all members of our Patreon via direct message on Patreon. If you would like to help donate to keep this show rolling you help by signing up for our Patreon at patreon.com/mattbeasley Or you can contribute to our effort to provide engaging discussions and crypto advice by donating Crypto to one of the addresses below. Bitcoin 377tYv4dHqo2gXajcjirjuXgQvPbWhv443 Ethereum 0x9b1956a6743e5e5383A012C4615443391E11BC08 Litecoin MAnasq344SrCa4M7Bx3zKVSiedzj8cJfT8 Bitcoin Cash qpjtfxc7wrud87alt809ntfxsdhyl3d9tqq58f7hxr Due to some issues behind the scenes and in order to protect my well being and my families well being I have been forced to disable comments and chat on our Youtube videos. We have also disabled our Twitter account. This will allow our broadcasts to stay on topic and not be interrupted by people who do not contribute to our conversation in a positive manner. I have done as much as I can to ward off the situation but it has reached a point now where I cannot let it continue. Hopefully in the near future we will be able to resume our conversations in the chat but for right now that is not possible. I appreciate each and everyone of you that has supported the show since day one and continues to support. Your not in this alone I am right here with you guys all the time. Note*** I am not a financial advisor and by no means should even be consider an expert in how to manage your money. I do these shows to have open conversations about the shape of the crypto markets and sometimes share my own personal opinion on how the markets might behave in the future.
Views: 627 Matt Beasley
Bitcoin's Origins and the Genesis Blockade
 
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In this talk, Andreas recounts the origins of Bitcoin, the meaning of the message embedded forever in its genesis block, and how we figured out who the banks truly serve when there was no other choice. He also speaks about what happens when money stops working, why censorship resistance was one of Bitcoin's most valuable characteristics from the start, and what possibilities lay in store with a global, voluntary financial system. This talk took place on August 6th 2018 as part of 'The Internet of Money Tour' at the Hilton Denver Inverness in Denver, Colorado: https://antonopoulos.com/event/arapahoe-libraries-talk/ 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: Money As A System-of-Control - https://youtu.be/FyK4P7ZdOK8 Worse Than Useless: Financial Surveillance - https://youtu.be/n4F-h4xuXMk The Currency Wars and Bitcoin's Neutrality - https://youtu.be/Bu5Mtvy97-4 Measuring Success: Price or Principle - https://youtu.be/mPMsbgWl9p4 Why Open Blockchains Matter - https://youtu.be/uZPIz3ArQww Decentralised Globalisation - https://youtu.be/QoiR4aNbTOw Investing in Education instead of Speculation - https://youtu.be/6uXAbJQoZlE Beyond Price: Bitcoin's Impact on the Future - https://youtu.be/rvwVbRQ5Ysc Wallet design and mass adoption - https://youtu.be/WbZX6BDZJHc Mass adoption and peer-to-peer commerce - https://youtu.be/n9qIAEFS-Qs Price volatility and store of value - https://youtu.be/wzzZT95ijTo Why I earn bitcoin instead of buying - https://youtu.be/Ci7TyD8jETY Job opportunities with cryptocurrencies - https://youtu.be/89_p4pDlQtI Inspiring cryptocurrency projects - https://youtu.be/WW8norCKUbE From barter to abstract money - https://youtu.be/KYsppZoHguQ Crossing the chasm of theoretical vs. real need - https://youtu.be/yIR0OBEAaUE Remittances and smuggling in Venezuela - https://youtu.be/RRXecXfWARw How long until mainstream adption? - https://youtu.be/y3cKBDBabtA What is the biggest adoption hurdle? - https://youtu.be/jHgyHF3F2TI Bitcoin as everyday currency - https://youtu.be/xYvvSV4mjH0 Hyperbitcoinization - https://youtu.be/AB5MU5fXKfo Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in bitcoin. Follow on Twitter: @aantonop https://twitter.com/aantonop Website: https://antonopoulos.com/ He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters. THE INTERNET OF MONEY, v1: https://www.amazon.co.uk/Internet-Money-collection-Andreas-Antonopoulos/dp/1537000454/ref=asap_bc?ie=UTF8 [NEW] THE INTERNET OF MONEY, v2: https://www.amazon.com/Internet-Money-Andreas-M-Antonopoulos/dp/194791006X/ref=asap_bc?ie=UTF8 MASTERING BITCOIN: https://www.amazon.co.uk/Mastering-Bitcoin-Unlocking-Digital-Cryptocurrencies/dp/1449374042 [NEW] MASTERING BITCOIN, 2nd Edition: https://www.amazon.com/Mastering-Bitcoin-Programming-Open-Blockchain/dp/1491954388 Translations of MASTERING BITCOIN: https://bitcoinbook.info/translations-of-mastering-bitcoin/ Subscribe to the channel to learn more about Bitcoin & open blockchains! Music: "Unbounded" by Orfan (https://www.facebook.com/Orfan/) Outro Graphics: Phneep (http://www.phneep.com/) Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)
Views: 15602 aantonop
A Message To Roger Ver | 17MAY17
 
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Any donations are always greatly appreciated 🙏 BTC: 3JCCg7yLLyu6ugERkJ9whch2LCSNY46Bpb LTC: MVrNaDF2T2KnvXPSzDA54xktp7B2bSbWjT ------------------------------------------------------- If you'd like to mine your own Bitcoin and other cryptocurrencies then visit Genesis Mining. It's one of the oldest and most trusted companies for cloud mining: https://www.genesis-mining.com/a/550855 PLEASE DON"T FORGET TO USE MY CODE: EYeUrA (You'll receive a %3 upgrade for this purchase and every single purchase thereafter when you use it!) Anyone who upgrades here is added to a rotational list that will continue to receive upgrades as long as I continue to cloud mine. (Please confirm via email or in the comments below by leaving your code.) ------------------------------------------------------- Music by: Nymano - Skate at night https://www.youtube.com/watch?v=2IrXdi3O1oM Jinsang - Smile From You https://soundcloud.com/jinsangbeats/a-smile-from-you ------------------------------------------------------- ------------------------------------------------------- bitcoin,bitcoin mining,cryptocurrency,genesis mining,hashflare,mining,dogecoin,blockchain,bitcoin cloud mining,btc,ethereum,best cloud mining,cloud,litecoin,crypto,cloud mining review,bitcoins,bitcoin wallet,digital currency,cryptocurrency trading,cloud mining bitcoin free,hashflare cloud mining,cloud mining 2017,cloud mining bitcoin,coin bank,hashocean,bitcoin mining rig,bitcoin earn,mining contract,bitcoin miner,mining bitcoin,hash,make money online, roger ver, tone vey, blockstream
Views: 271 PK
Ethereum Wallets, Transactions and Gas Explained in Plain English
 
13:02
For the full text version including wallet reviews visit our site: https://99bitcoins.com/ethereum-wallets/ 00:00 - What we will cover 01:03 - Ethereum vs. Bitcoin 01:40 - Ehtereum accounts 02:58 - Ethereum transactions 3:55 - Ethereum wallets 07:11 - Ethereum units 07:52 - Gas and fees Thanks for watching and don't forget to subscribe to get notified about new videos :)
Views: 2117 99Bitcoins
Jesus has a message for Bitcoin
 
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Hark, I am Jesus, who died for your sins I deliver a message for Bitcoin. Thou shalt not commit ASIC Boost Thou shalt love BIP 148 Bear ye segregated witness and lightning network May crypto-currency reign a new era for mankind. Amen, in the name of Satoshi Nakamoto
Views: 802 Will PayCoin
Constructing a Bitcoin transaction using python  - 1/5
 
14:04
This video is for people who wants to use (almost) raw python code to Constructing a Bitcoin transaction. If you loved this video, show me the love! BTC address: 1LxhkGzGu6q2LSfAGuH2DNBChmLhHkuQzP In the previous videos I've explained how to connect to the bitcoin network, as well as how to use private and public keys. I suggest that you'll check out these videos: https://www.youtube.com/playlist?list=PLH4m2oS2ratfeNpZAoVwPlQqEr3HgNu7S In this video I'm using the external libraries: ecdsa and base58 You can see the complete code on github: https://github.com/Shultzi/Mybitcoin My blog: http://zeltsinger.com/ Some recommended links: Bitcoinbook - https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch02.asciidoc#transaction-aggregating Hen Shirriff's blog -http://www.righto.com/2014/02/bitcoins-hard-way-using-raw-bitcoin.html The royal fork - http://royalforkblog.github.io/ wiki - https://en.bitcoin.it/wiki/Transaction https://en.bitcoin.it/wiki/Script bitcoin.org Developer documentation -https://bitcoin.org/en/developer-documentation
Views: 5838 Shlomi Zeltsinger
Ep. # 347- BTC Core's Gregory Maxwell Burned on BitcoinTalk Message Boards By Core Supporter
 
17:52
👍Thank You For Watching! Currently Playing: [Horror] Outlast 2- https://www.youtube.com/playlist?list=PLPFzl269uOXZdbNTpJEfSBmZLU-YIP9v5 🌐►Follow me on Steemit: https://steemit.com/@crypt0/ 📰►Today's (March 26th, 2017) News Playlist: https://www.youtube.com/watch?v=dihMBEkCgF8&list=PL4CxcnSy5_bhTWck0vN-NSM7Bj1aVsHnV 🗣"**ck Gregory Maxwell, Core, LN, Adam Back, & Others": https://bitcointalk.org/index.php?topic=1842146.msg18335776#msg18335776 🎁Original Ethereum Coin (Silver Plated) https://www.amazon.com/gp/product/B00WFSY07E/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B00WFSY07E&linkCode=as2&tag=obham001-20&linkId=94f43a18a44e4f6dd9a0e7152b0bccee 🎁.999 Fine Gold Bitcoin Commemorative Round Collectors Coin - Bit Coin is Gold Plated Copper Physical Coin https://www.amazon.com/gp/product/B00J2B0KEO/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B00J2B0KEO&linkCode=as2&tag=obham001-20&linkId=6fd5fbf1a889eda71059c478daaebc9f 💎►Donate Ether and Ethereum-Based (ERC-20) Tokens 0x3124Dcd240b330945896b0cdfa8dD20ed400704c 💎►Donate Bitcoin 17nFpuYFBxjtGbXgoMbyFGFHemkC5ayz6D 💎►Donate ZClassic t1QYnUPqpVK859pss9NYrCesE3f1d89izvk 💎►Donate Monero 463EDu2cqU4ASxLVVKYkVMbk1Nz6TQyy9Wt8b3D5CdJjZh9JukZNGUyLvbJnXoJNRXTN98cSpLSRVN2bYoDTmsxkJSUKtmy 💎►Donate Dash Xn1sUfFDkZAwArJ6mtJUYVLndnmXctxA1L 💎►Donate Tao TaSRBaySFxoicXNkX6gEdamkP3KzsLbXAp ⚡Want to start building a cryptocurrency mining rig? Here's a good start: https://www.amazon.com/Mining-1200w-Biostar-Risers-Ethereum/dp/B01ND0A2L9/ref=sr_1_fkmr0_4?ie=UTF8&qid=1486465810&sr=8-4-fkmr0&keywords=zcash+rig 📔___RECOMMENDED READING ►The Singularity Is Near: When Humans Transcend Biology https://www.amazon.com/Singularity-Near-Humans-Transcend-Biology/dp/0143037889/ref=as_sl_pc_qf_sp_asin_til?tag=obham001-20&linkCode=w00&linkId=0b1721e694347bab519455cddc0e15d3&creativeASIN=0143037889 ►Physics of the Future: How Science Will Shape Human Destiny and Our Daily Lives by the Year 2100 https://www.amazon.com/Physics-Future-Science-Shape-Destiny/dp/0307473333/ref=as_sl_pc_qf_sp_asin_til?tag=obham001-20&linkCode=w00&linkId=8af69a9df29aeb4ae2a663acadcf34e7&creativeASIN=0307473333 ►The Creature From Jekyll Island https://www.amazon.com/gp/product/091298645X/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=091298645X&linkCode=as2&tag=obham001-20&linkId=ee46ae4d76aba65c3186fe0236ad8966 🔑__A MUST HAVE__ ►Ledger Nano S (Bitcoin+Ethereum+More Hardware Wallet) https://www.amazon.com/gp/product/B01J66NF46/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B01J66NF46&linkCode=as2&tag=obham001-20&linkId=d694fa05a37750a8e570818f82a0c3ff ☑️Need your own website? Make one by clicking here: https://www.bluehost.com/track/obham001/promotion 📸🎥My 4k Live-Streaming Camera: https://www.amazon.com/Panasonic-Mirrorless-Cinematic-Videographers-Essentials/dp/B00WINA5TI/ref=as_sl_pc_tf_til?tag=obham001-20&linkCode=w00&linkId=ed8fc11372f6a8441a5e22bc990e691b&creativeASIN=B00WINA5TI 💻►Crypt0's News Official Site: http://crypt0snews.com 🕹►Crypt0's PC Gaming Channel: https://www.youtube.com/channel/UCwU0FQ64SN1AjLI5hik-MZQ -~-~~-~~~-~~-~- Please watch: "Visa Hiring Ethereum Devs / ICN Public Launch / SNGLS Release / Gox Coins Found / Steemit Soaring" https://www.youtube.com/watch?v=lkzKqn5iErU -~-~~-~~~-~~-~-
Views: 2931 Crypt0
A WARNING for if you fuck with me, fuck with my money, or fuck with my life.
 
07:27
this is a message to only a SMALL TINY percentage of you viewers. Less than 1% of you: FUCK YOU. GET FUCKED YOU CUNT.
Views: 1010598 Etika
CryptoKitties Stuck Transactions Fix - Ethereum Network
 
03:00
Everyone wants Cryptokitties but there is a transaction error, here is how I was able to fix it. FYI I'm using Firefox not chrome. cryptokitties,crypto,metamask error,metamask,cryptokitties transaction,cryptokitties error,buy cryptokitties,buy crypto,buy cryptocat,cryptokitties issue, cryptokitties, ethereum, bitcoin, blockchain, cryptocurrency, money, technology, crypto, tenx, coinbase, venezuela, cryptokitties tutorial, what is cryptokitties?, cryptokitties review, buy cryptokitties, what is cryptokitties, crypto kitties guide, crypto kitties review, crypto kitties overview, cryptokitties overview, what are cryptokitties?, cryptokitties game, crypto kitties, dash, hosp, julian, julianhosp, invest, investieren, mining, kryptowaehrungen, gbtc, bitcoin diamond, economics, scaling, segwit, cboe, new cryptokitties game, petro, btc, crypto kitties guide, fix transactions, fix cryptokitties
Views: 2954 CryptoKnight
How do bitcoin transactions work? | Simply Explained for Beginners | BTC.com
 
01:24
Simple tutorial for beginners about how bitcoin and cryptocurrency transactions work, and how blockchain technology makes it all possible. This video was made by: https://btc.com/ BTC.com is a simple-to-use digital wallet for Bitcoin & Bitcoin Cash. You can buy, store and use cryptocurrencies securely! Simple and user friendly for beginners, with many features for advanced users! Get your free wallet: • Browser: https://wallet.btc.com/#/setup/register?utm_source=youtube&utm_medium=video&utm_campaign=educational • iOS: https://itunes.apple.com/us/app/blocktrail-bitcoin-wallet/id1019614423 • Android: https://app.appsflyer.com/com.blocktrail.mywallet?pid=youtube&c=educational Learn more about cryptocurrencies & blockchain: https://blog.btc.com/ Want to buy Bitcoin or Bitcoin Cash securely with credit card? Learn how it works: https://blog.btc.com/buy-bitcoin-with-credit-card-in-your-wallet-9af7b09c3640 Would you like to get help from our support team? Please send a message to support@btc.com and we are happy to help you!
Views: 84 BTC.com
Bitcoin and cryptocurrency mining explained
 
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Bitcoin and cryptocurrency mining explained with the the Byzantine Generals Problem. The Byzantine Generals problem was first introduced in a computer science paper published in 1982. The problem discussed in the paper is that reliable computer systems must be able to function effectively in the presence of faulty components that may send conflicting information to different parts of the system. This issue is even more acute when we talk about decentralized computer networks. Imagine the following thought experiment: The Byzantine army has surrounded an enemy city. The army is organized into several units. Each unit is commanded by a general and they all need to come up with a coordinated plan of action. However, they are located away from each other and the only means to communicate among themselves is via messages. To make things more complicated, one or more of the generals are possibly traitors. The presence of disloyal generals means that misleading messages could be sent aiming to disrupt any coordinated plan of action, be it attack or retreat. To find a successful solution to this conundrum, the Byzantine army needs to find its path to coordinated action, one way or another. To achieve this, the Byzantine army needs an algorithm that works effectively towards a coordinated outcome where the loyal generals follow it and the traitors don’t. Now that you are familiar with the problem, let’s see its solution. It is called the Byzantine Fault Tolerance algorithm. Over the years, there have been several proposed theoretical solutions involving game theory and math. The first practical implementation of Byzantine Fault Tolerance algorithm came with the Bitcoin’s Proof-of-Work. In this case the “generals” are nodes on the Bitcoin network, also known as “miners”. A network node is a connection point that can receive, create, store and send data across a network. In other words, nodes are the connected dots that make up a network. To simplify, think of it in the following way. In the image we traditionally use to depict a blockchain, every single computer is a separate node. They are all connected and can receive, create, store, and send data to each other. In the context of the Byzantine Fault Tolerance algorithm, the important concept to grasp is that these mining nodes start from the assumption that nobody else on the network can be trusted. Proof-of-Work secures network consensus even in the presence of non-compliant nodes. That is, even if there are some Byzantine generals who are not acting in the army’s best interest, coordinated action can still be achieved. Let’s see how this mechanism works in Bitcoin. As we all know by now, Bitcoin is a peer-to-peer network where all activities are done by its users through appropriate software and hardware. These activities include making transactions, receiving transactions, and verifying and transmitting transactions. Now, this is where we need to introduce the concept of “mining”, which many of you have probably heard. Mining is an activity, carried out by network participants, which involves Proof-of-Work and results in generating new coins as a reward for the miner who successfully did this Proof-of-Work first for each new block. On Facebook: https://www.facebook.com/365careers/ On the web: http://www.365careers.com/ On Twitter: https://twitter.com/365careers Subscribe to our channel: https://www.youtube.com/365careers
Views: 2155 365 Careers
How to Download & Cryptographically Verify the Exodus Bitcoin Wallet
 
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The Crypto Dad Downloads and Cryptographically verifies the Exodus Bitcoin Wallet installer. He also discusses public/private key cryptography and how the verification process works. The Exodus Bitcoin Wallet can be found at: https://www.exodus.io/ The cryptographic tools can be found at: GnuPG Privacy Guard https://gnupg.org/ Gpg4Win (The Windows version of GnuPG) https://www.gpg4win.org/ We verify our Sha256 with: MD5 & SHA Checksum Utility https://raylin.wordpress.com/downloads/md5-sha-1-checksum-utility/ What is the Exodus Wallet? The Exodus multi-currency wallet is software that runs on your computer. It is an application that allows you to send, receive and store bitcoins, ether tokens, and many other crypto-currencies. It also has advanced features that allow you to check your current balance, see a list of transactions, and even maintain several “wallets”. It does this by allowing you to access a bitcoin address on the Bitcoin blockchain. Access to a Bitcoin address is provided by a cryptographic key-pair. The key-pair is a public/private asymmetric cryptographic key. The public key is the receiving address. This is the address you can share with others, so they can send you bitcoins. The private key is the part that allows you to send bitcoins. The Exodus Wallet software creates a new key-pair whenever you create a new wallet. It stores the private key on your computer. The private key is protected by on-disk encryption. Exodus will automatically decrypt the private key when you wish to send bitcoins. Access to the private key is also enhanced by a password or your own choosing that you can set when the wallet is created. Best practice is to choose a strong password for your Exodus Wallet. What is Bitcoin? Bitcoin is a new technology that functions as a digital currency. It is a peer-based, decentralized way to hold, store, send, and receive value. It does this by maintaining a cryptographic “ledger” called the Blockchain. All of the bitcoins in existence are created and stored on the Blockchain. Bitcoin with a capital “B” refers to the technology itself. Bitcoin spelled with a little “b” refers to the tokens that hold the value and can be exchanged with others. Multiple copies of the Blockchain exist on thousands if not millions of computers worldwide. Each copy of the Blockchain “verifies” itself by connecting to the Internet and making sure it has the most up-to-date list of transactions. The Blockchain maintains its integrity by using strong, modern, encryption techniques. This makes it impossible for anyone to alter the ledger, create fake transaction or “double-spend” their bitcoins. Bitcoins do not require banks or third-party financial services to act as central clearing houses for electronic transfers. In essence, Bitcoin technology “cuts out the middleman”. Bitcoin is a decentralized, peer-to-peer monetary system that exists outside of the traditional, centralized, fiat-currency based financial system.
Views: 4126 Rex Kneisley
CoinText Chooses Bitcoin Cash [BCASH] as Payment of Choice for SMS Transactions - #ADOPTION
 
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🚀 Get the Apps! ★ http://cryptoyum.com ★ http://coinpuffs.com 10 Days of Bitcoin: 💯 Free Email Course! ★ http://10daysofbitcoin.com Send BCASH through text messages? Is this the future that we really wanted? // GET STARTED 🚀 Become a Cryptonaut - Support us on http://patreon.com/pub 💻 Join us at the PUB! - http://thebitcoin.pub 💰Get a Coinbase Wallet! - http://dctv.co/dctv-coinbase - Sign up! // WE DO SOCIAL 🔑 Decentralized Newsletter - https://dctv.co/dctv-news 📔 Twitter - https://dctv.co/dctv-twitter 📔 Facebook - https://dctv.co/dctv-fb 🔑 Instagram - https://dctv.co/dctv-instagram 💻 Google+ - https://dctv.co/dctv-googleplus ✏️ LinkedIn - https://dctv.co/dctv-linkedin 💻 Medium - https://dctv.co/dctv-medium Music by Charles Giovanniello, a Bitcoin Pub community member! Note: This is not financial advice as all investing is speculative. Have fun and good luck!
Views: 1567 Decentralized TV
Bitcoin Vs Bitcoin cash Transactions Fees and Transaction Time
 
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In this video Transaction Time aur fees par bitcoin aur Bitcoin Cash me kya differences hai bataya gaya hai ... Bitcoin Vs Bitcoin cash Transactions Fees and Transaction Time I hope you will love the content. If you find the content helpful, then please hit LIKE Button, and also write your suggestions on comment box... LIKE ------- SHARE ------- SUBSCRIBE Google Plus: https://plus.google.com/u/0/+TechyDost Facebook: https://www.facebook.com/TechyDostAlok Twitter: https://twitter.com/TechyDostAlok Subscribe on Youtube: https://goo.gl/AJ3nDo Blog: https://techydostalok.blogspot.in/ About : Techy Dost is a YouTube Channel, Where technology is simplified in Hindi ... )
Views: 251 Techy Dost