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Bitcoin 101 - Elliptic Curve Cryptography - Part 4 - Generating the Public Key (in Python)
 
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Welcome to part four in our series on Elliptic Curve Cryptography. I this episode we dive into the development of the public key. In just 44 lines of code, with no special functions or imports, we produce the elliptic curve public key for use in Bitcoin. Better still, we walk you through it line by line, constant by constant. Nothing makes the process clearer and easier to understand than seeing it in straight forward code. If you've been wondering about the secp256k1 (arguably the most important piece of code in Bitcoin), well then this is the video for you. This is part 4 of our upcoming series on Elliptic Curves. Because of such strong requests, even though this is part 4, it is the first one we are releasing. In the next few weeks we will release the rest of the series. Enjoy. Here's the link to our Python code (Python 2.7.6): https://github.com/wobine/blackboard101/blob/master/EllipticCurvesPart4-PrivateKeyToPublicKey.py Here's the private key and the link to the public address that we use. Do you know why it is famous? Private Key : A0DC65FFCA799873CBEA0AC274015B9526505DAAAED385155425F7337704883E Public Address on Blockchain.info https://blockchain.info/address/1JryTePceSiWVpoNBU8SbwiT7J4ghzijzW Here's the private key we use at the end: 42F615A574E9CEB29E1D5BD0FDE55553775A6AF0663D569D0A2E45902E4339DB Public Address on Blockchain.info https://blockchain.info/address/16iTdS1yJhQ6NNQRJqsW9BF5UfgWwUsbF 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
Views: 20320 CRI
Blockchain tutorial 17: Generate Bitcoin address
 
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This is part 17 of the Blockchain tutorial explaining how to generate a Bitcoin address using an online tool. 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. Mobilefish.com http://www.mobilefish.com Cryptocurrency address generator and validator http://www.mobilefish.com/services/cryptocurrency/cryptocurrency.html 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: 3359 Mobilefish.com
Recover RSA private key from public keys - rhme2 Key Server (crypto 200)
 
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Using the greatest common divisor (GCD) to factorize the public modulo into the secret primes, so we can forge a RSA signature. Source for the rhme2 challenges: https://github.com/Riscure/Rhme-2016 -------------------------------------- Twitter: https://twitter.com/LiveOverflow Website: http://liveoverflow.com/ Subreddit: https://www.reddit.com/r/LiveOverflow/
Views: 30636 LiveOverflow
Blockchain tutorial 15: Convert public, private key pairs to addresses
 
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This is part 15 of the Blockchain tutorial explaining why some Blockchain implementations convert public, private key pairs to addresses. 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: 5050 Mobilefish.com
How to Verify a Bitcoin address generated by Bitaddress.org
 
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The Crypto Dad goes through the steps involved in verifying the webpage at https://bitaddress.org Bitaddress.org is a website that allows you to generate a unique bitcoin address that you can use for a cold-storage paper wallet. Verification of this site is very important. The steps followed are outlined here: 1. Save the developer’s signing file on your computer. 2. Import the signing file into your GPG keyring 3. Save the CHANGELOG to your computer 4. Verify the signed CHANGELOG using GPG and the signing key you downloaded in step 1 5. Save the wallet page to your computer as HTML only. 6. Generate a SHA256 hash from the saved webpage 7. Verify that the generated SHA256 hash matches the hash in the now-trusted CHANGELOG You can get the GnuPG verification software at: https://gnupg.org/ Specifically Gpg4Win. https://www.gpg4win.org/index.html Sha Sum Checking is done with: MD5 & SHA Checksum Utility https://raylin.wordpress.com/downloads/md5-sha-1-checksum-utility/ Or The online Checker http://onlinemd5.com/ Donate Bitcoin: 1JBxwXG8P6PYKKsrHKzQduM8s8RoV3dnjr
Views: 3331 Rex Kneisley
Public Key Cryptography: Diffie-Hellman Key Exchange (short version)
 
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This is a segment of this full video: https://www.youtube.com/watch?v=YEBfamv-_do Diffie-Hellman key exchange was one of the earliest practical implementations of key exchange within the field of cryptography. It relies on the discrete logarithm problem. This test clip will be part of the final chapter of Gambling with Secrets!
Views: 435574 Art of the Problem
Bitcoin 101 - Elliptic Curve Cryptography - Part 5 - The Magic of Signing & Verifying
 
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There is nothing more magical in Bitcoin, or all of cryptography than digital signatures. And the most magical step of all is the verification. This is the step we focus on in this video, generating the entire process in just 50 lines of code (no imports or special function calls!) and watching as the Private Key falls out of the math entirely! So beautiful. The receiver is left with proof of the sender, confirmation of the message and no way of retrieving the senders private key. This is magic indeed. Here's the link to the Python code: https://github.com/wobine/blackboard101/blob/master/EllipticCurvesPart5-TheMagic-SigningAndVerifying.py 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
Views: 8878 CRI
How To Send Encrypted PGP Messages | Kleopatra & Gpg4win
 
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Follow this tutorial to learn how to send encrypted PGP messages using Kleopatra and Gpg4win. Send your first encrypted message within 5 minutes from now! https://www.gpg4win.org » Highly secure online Bitcoin wallet: http://bit.ly/StrongCoinWallet » Free Unlimited Web Hosting: http://bit.ly/GoogieHost Leave a like if this helped. Follow Quantech on Twitter: http://bit.ly/20VXtDu Subscribe to the channel: http://bit.ly/1OZ5IZZ PGP encryption is the most common way of message encryption, it uses public and private keys from individuals. Your public key can be put anywhere online and people will be able to send you encrypted messages that only you can decrypt. ------------------------------------------------------------------------------------------------------- » Free Unlimited Web Hosting: http://bit.ly/GoogieHost • Equipment Used: » Blue Snowball ICE: http://bit.ly/1RA9IjV » Neewer Microphone Arm: http://bit.ly/1XV1qId » Sony Vegas Pro 13: http://bit.ly/1VObKmA » Photoshop CC: http://adobe.ly/1Sn6nYK
Views: 84350 Quantech
IOTA tutorial 9: Address and checksum
 
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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 9 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 procedure to generate IOTA addresses is as follows: IOTA addresses are deterministically generated starting with the seed (81 trytes). Seed (trytes): C9RQF ... QIAWT Convert the seed (81 trytes) to trits (= 81 x 3 = 243 trits) Seed (trits): 0,1,0,0,0,0 ... -1,-1,0,-1,1,-1 Every address has a corresponding key index number. A key index number is an integer starting from 0. Address 0 has key index number 0, address 1 has key index number 1, etc. They key index number always starts with integer 0, and is simply incremented in order to get the next address. The largest key index number allowed is 9007199254740991. This largest key index number is the same as 2^53 - 1, which is the same as the Javascript constant: Number.MAX_SAFE_INTEGER An IOTA seed can generate in total 9007199254740992 addresses. The decimal key index number must be converted to trits. For example the key index number 1 converted to trits looks like: 1,0,0 Next create a subseed by adding the key index number and seed together. subseed = seed + key index number IOTA provides 3 security levels: 1, 2 or 3. A security level determines the number of rounds for hashing, which means that a single seed can have 3 different accounts. A different security level with the same index number, means that you will get a different address. Security level 1, Key size (trits): 6561 x 1 Remark: Used for low security (for very high efficiency). Best for tiny IoT devices that only transact/store small amounts of value. Security level 2, Key size (trits): 6561 x 2 Remark: Used for standard security (for medium performance). Best for regular people's wallets and devices that store higher amounts of value. Security level 3, Key size (trits): 6561 x 4 Remark: Used for full blown quantum proof security that conforms to National Security Agency’s (NSA) recommendations for sensitive material. Good for big value transactions and paranoids. Client libraries, such as iota.lib.js makes it possible to choose another security level. See: https://www.mobilefish.com/services/cryptocurrency/iota_wallet.html By default the IOTA light wallet uses security level 2 and you can not change its security level. If you created an address using security level 1 or 3 this address will not appear in the IOTA light wallet using the same seed. In the next slide a simplistic explanation is given how the subseed is hashed multiple times using the Keccak-384 hash algorithm. The hashing is done in a wrapper class called Kerl. The seed and subseed can differ between the first 1 tryte up to and including 12 trytes. If someone else has exactly the last 69 (= 81 - 12) trytes up to and including 81 trytes of your seed they can see the balance of one or more of your addresses. The probability that someone else happens to have the same last 69 trytes of your seed is very small. Here is the proof: IOTA seed with only 69 trytes has 27^69 = 5.80 x 10^98 possible combinations. For comparison: A Bitcoin private key with 256 bits has 2^256 = 1.15 x 10^77 possible combinations. This means, even if you have an IOTA seed with only 69 trytes it has more possible combinations than a Bitcoin private key. A checksum is an additional 9 trytes added to an address (81 trytes) which can be used to validate the integrity and validity of the address. An address with checksum is 90 trytes long, 81 trytes for the address itself and 9 trytes for the checksum. The procedure to calculate an address checksum is as follows: Start with an IOTA address (81 trytes).Address (trytes): FSAFM ... NVDZC Convert the address (81 trytes) to trits (= 81 x 3 = 243 trits) Address (trits): 1,0,-1,1,0,-1 ... -1,0,0,0,1,0 The address is hashed using the Keccak-384 hash algorithm. Convert the address checksum (243 trits) to trytes (81 trytes): ...PJFNYWVUGKPRTRV Get the last 9 trytes: VUGKPRTRV Append the last 9 trytes to the original address: FSAFM ... NVDZCVUGKPRTRV The address including checksum has a length of 81 + 9 = 90 trytes. The IOTA light wallet: Always creates addresses including the checksum. The addresses are always 90 trytes long. Always requires receive addresses, with valid checksums when making a transaction. The receive addresses must be 90 trytes long. 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: 2465 Mobilefish.com
Cryptocurrencies: Last Week Tonight with John Oliver (HBO)
 
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Digital currencies are generating a lot of excitement. John Oliver enlists Keegan-Michael Key to get potential investors equally excited about the concept of caution. Connect with Last Week Tonight online... Subscribe to the Last Week Tonight YouTube channel for more almost news as it almost happens: www.youtube.com/user/LastWeekTonight Find Last Week Tonight on Facebook like your mom would: http://Facebook.com/LastWeekTonight Follow us on Twitter for news about jokes and jokes about news: http://Twitter.com/LastWeekTonight Visit our official site for all that other stuff at once: http://www.hbo.com/lastweektonight
Views: 8320950 LastWeekTonight
Jamie's Windows OS OpenPGP Tutorial, Encrypt your messages using Gpg4Win
 
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Please support the show by donating Bitcoin to https://blockchain.info/address/1NgmjuqegdRkzkXpTcCbQcmk1HriwSucmy This is Part 1 in a series to help people understand OpenPGP and use it on different Operating Systems Jamie goes step-by-step from downloading GPG4Win from gpg4win.org, creating PGP keys, encrypting a message, and decrypting a message. He shows the Mailvelope browser plugin at the end that makes encrypting webmail much easier. www.mailvelope.com These may not be best practices for using OpenPGP, but I think they are better than nothing. For a more in depth lesson see Paul Furley's Why Humans Should Care about Cryptography https://paulfurley.com/gpg-for-humans-why-care-about-cryptography/
Views: 2723 World Crypto Network
Asymmetric encryption - Simply explained
 
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How does public-key cryptography work? What is a private key and a public key? Why is asymmetric encryption different from symmetric encryption? I'll explain all of these in plain English! 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
Blockchain tutorial 11: Elliptic Curve key pair generation
 
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This is part 11 of the Blockchain tutorial explaining how the generate a public private key using Elliptic Curve. 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 The presentation used in this video tutorial can be found at: http://www.mobilefish.com/developer/blockchain/blockchain_quickguide_tutorial.html The python script used in the video: https://www.mobilefish.com/download/cryptocurrency/bitcoin_ec_key_generation.py.txt Cryptocurrency address generator and validator: https://www.mobilefish.com/services/cryptocurrency/cryptocurrency.html Desmos graph: https://www.desmos.com/calculator/kkj2efqk5x James D'Angelo, Bitcoin 101 Elliptic Curve Cryptography Part 4: https://youtu.be/iB3HcPgm_FI #mobilefish #blockchain #bitcoin #cryptocurrency #ethereum
Views: 13917 Mobilefish.com
PGP Encryption Tutorial (using gpg4win and Kleopatra)
 
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A short tutorial on how to use Kleopatra and gpg4win to encrypt messages using public PGP keys. Download gpg4win and Kleopatra here: http://www.gpg4win.org/ ** Also, an easier way instead of saving the persons public key as a GPG. Just have is saved to your clipboard and click on the system tray and click 'Certificate Import' and it does it all it's self :) (Harvey Crumpet)
Views: 172023 Kevin Cronly
Why The Government Shouldn't Break WhatsApp
 
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Encryption backdoors - breaking WhatsApp and iMessage's security to let the government stop Bad Things - sounds like a reasonable idea. Here's why it isn't. A transcript of this video's available here: https://www.facebook.com/notes/tom-scott/why-the-government-shouldnt-break-whatsapp/1378434365572557/ CREDITS: Filmed at the Cambridge Centre for Computing History: http://www.computinghistory.org.uk/ Camera by Tomek: https://www.youtube.com/tomek Thanks to everyone who helped proofread my script! REFERENCES: WhatsApp's privacy protections questioned after terror attack: http://www.bbc.co.uk/news/technology-39405178 WhatsApp must be accessible to authorities, says Amber Rudd: https://www.theguardian.com/technology/2017/mar/26/intelligence-services-access-whatsapp-amber-rudd-westminster-attack-encrypted-messaging UK government renews calls for WhatsApp backdoor after London attack: https://www.theverge.com/2017/3/27/15070744/encryption-whatsapp-backdoor-uk-london-attacks Investigatory Powers Act: http://www.legislation.gov.uk/ukpga/2016/25/contents/enacted India is 'ready to use' Blackberry message intercept system: http://www.bbc.co.uk/news/technology-23265091 Revealed: how US and UK spy agencies defeat internet privacy and security: https://www.theguardian.com/world/2013/sep/05/nsa-gchq-encryption-codes-security Councils secretly spied on people walking dogs and feeding birds for five years: http://metro.co.uk/2016/12/26/councils-secretly-spied-on-people-walking-dogs-and-feeding-birds-for-five-years-6345051/ [This is basically a rephrase of https://www.theguardian.com/world/2016/dec/25/british-councils-used-investigatory-powers-ripa-to-secretly-spy-on-public with a better headline] Poole council spies on family over school claim: http://www.telegraph.co.uk/news/uknews/1584713/Poole-council-spies-on-family-over-school-claim.html Security services missed five opportunities to stop the Manchester bomber: http://www.telegraph.co.uk/news/2017/05/24/security-services-missed-five-opportunities-stop-manchester/ Reuters reference to "500 active investigations": http://www.reuters.com/article/us-britain-security-manchester-plots-idUSKBN18L1H0 AP: Across US, police officers abuse confidential databases: https://apnews.com/699236946e3140659fff8a2362e16f43/ap-across-us-police-officers-abuse-confidential-databases ME: I'm at http://tomscott.com on Twitter at http://twitter.com/tomscott on Facebook at http://facebook.com/tomscott and on Snapchat and Instagram as tomscottgo
Views: 943146 Tom Scott
The Search for Randomness | Jean Bourgain
 
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March 25, 2009 Jean Bourgain, IBM von Neumann Professor, School of Mathematics, Institute for Advanced Study http://www.ias.edu/people/faculty-and-emeriti/bourgain Although the concept of randomness is ubiquitous, it turns out to be difficult to generate a truly random sequence of events. The need for "pseudorandomness" in various parts of modern science, ranging from numerical simulation to cryptography, has challenged our limited understanding of this issue and our mathematical resources. In this talk, Professor Jean Bourgain explores some of the problems of pseudorandomness and tools to address them. More videos at http://video.ias.edu
14. SSL and HTTPS
 
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MIT 6.858 Computer Systems Security, Fall 2014 View the complete course: http://ocw.mit.edu/6-858F14 Instructor: Nickolai Zeldovich In this lecture, Professor Zeldovich discusses how to cryptographically protect network communications, as well as how to integrate cryptographic protection of network traffic into the web security model. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 53032 MIT OpenCourseWare
Bitcoin 101 - Multi-Signature Addresses pt2 - Spending, Protocol & Coding
 
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Part One - Generating a Multisignature Address Part Two - Spending From the Multisignature Address This part two of a two part series on muti-signature addresses and wallets. This is important technology for massively improving bitcoin security. In part one we generated a multisig address/wallet. In this part, we'lll walk you through all the steps necessary to spend the funds, going line by line through some simple python code and generating a payment in bitcoind. In many ways, multisig addresses are the answer to most of bitcoin's concerns and fears of theft. And now its time to scale up massive implementation for them. Originally introduced into the bitcoin client a few years ago, multisignature addresses massively more secure than regular ones. Their adoption by all wallet manufacturers is coming. But, for you techies and voyeurs, we'll jump inside the ideas of multi-sig and even program the stuff. Hope you enjoy. James' code can be found here: https://github.com/wobine/blackboard101 you'll see multisigs part one and two Jeff Garzik's Bitcoin python library is here https://github.com/jgarzik/python-bitcoinrpc remember to replace his connection.py file with ours for multisigs And a little bit about bitcoind is here https://en.bitcoin.it/wiki/Bitcoind but remember that it really is the most bare-bones bitcoin wallet software, but the one which allows the most programming. we love it. And finally, here's our lovely multisig address http://live.bitcore.io/address/35Z3xG92YkW5Xo4ngQw6w5b3Ce6MDw94A8 So cool to see it live and in action. 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
Views: 11371 CRI
Bitcoin 101 - Multi-Signature Addresses pt1 - Coding This Major Security Improvement
 
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Just like the Wright brothers, on those first flights at Kitty Hawk, didn't concern themselves that much with landing. And improvements like anti-lock brakes and seat belts help protect passengers in cars. Bitcoin is now in that 'second phase' where security is becoming massively important. Fortunately, because the currency is programmable, anything is really possible. Originally introduced into the bitcoin client a few years ago, multisignature addresses massively more secure than regular ones. Their adoption by all wallet manufacturers is coming. But, for you techies and voyeurs, we'll jump inside the ideas of multi-sig and even program the stuff. Hope you enjoy. All the public and private keys are at the bottom of this description James' code can be found here: https://github.com/wobine/blackboard101 there, you'll see the code for part one and two of this video Jeff Garzik's Bitcoin python library is here https://github.com/jgarzik/python-bitcoinrpc remember to replace his connection.py file with ours for multisigs And a little bit about bitcoind is here https://en.bitcoin.it/wiki/Bitcoind but remember that it really is the most bare-bones bitcoin wallet software, but the one which allows the most programming. we love it. A multisig wallet is already in production: Check it out https://www.bitgo.com/ We're still waiting to see how they use multisig to see if it really works for the end user. And finally, here's our lovely multisig address http://live.bitcore.io/address/35Z3xG92YkW5Xo4ngQw6w5b3Ce6MDw94A8 So cool to see it live and in action. Welcome to WBN's Bitcoin 101 Blackboard Series -- a full beginner to expert course in bitcoin. We hope you enjoy. And remember the official WBN launch is coming up : June 1st, 2014. Please like, subscribe, comment or even drop a little jangly in our bitcoin tip jar 1javsf8GNsudLaDue3dXkKzjtGM8NagQe Thanks, WBN Brand New Address Pair: Number 1 Compressed Public Address - 34 chars - 1L2hyXoKmtRffKHhQ8XGyWFVBgZHJckkbx Private Key - 52 chars - L2M1uRgdwgCotoP8prWJYYwz2zwWgsMa9TJwqARG7nFxkpdvBSsm Less compressed Public Key/Address - 66 chars - 020743d44be989540d27b1b4bbbcfd17721c337cb6bc9af20eb8a32520b393532f Brand New Address Pair: Number 2 Compressed Public Address - 34 chars - 13XTNTnApsAc4aEPniAncmnDxWJcY6QcPF Private Key - 52 chars - L1M2ZgjoAtDVu9uemahiZBQPwFA5Tyj4GLd1ECkDryviFrGp6m7k Less compressed Public Key/Address - 66 chars - 02c0120a1dda9e51a938d39ddd9fe0ebc45ea97e1d27a7cbd671d5431416d3dd87 Brand New Address Pair: Number 3 Compressed Public Address - 34 chars - 1DT8Ki2HKzFYUVnv9hg9Pg1EE5G32kmP3Y Private Key - 52 chars - L5PkVBzR4SdQimMsfHnRqRegJZDFJ22sGjSbfp3SsPSnVoB8vRFE Less compressed Public Key/Address - 66 chars - 0213820eb3d5f509d7438c9eeecb4157b2f595105e7cd564b3cdbb9ead3da41eed
Views: 20902 CRI
8 Things You Didn’t Know About the Deep Web
 
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Mostly everyone is browsing on the internet to get information nowadays. Let's take a look at some invisible web secrets. Support our Patreon today: https://www.patreon.com/theywillkillyou Subscribe for new videos: http://goo.gl/SaufF4 Follow us on Instagram: @theywillkillyou Known as ‘The Onion Router’ from its original project name, Tor is free software that allows users to communicate on the Internet anonymously. This is achieved by directing traffic through a network of over seven thousand relays that hide the user & their location from traffic analysis & network surveillance. Much like the layers of an onion, Tor implements layered data encryption in its communication protocol. Tor’s main objective is to protect the privacy of its users & to give them the freedom of conducting confidential communication & ensuring that their Internet activities are not being monitored. The software was developed by The Tor Project, Inc, Inc, a nonprofit research & education organization founded by Nick Mathewson, Roger Dingledine & five others. The bulk of their funding came from the United States Government. The Tor Browser, which is a modified & extremely secure version of Mozilla Firefox, is the project’s flagship. For the time being, attacks against Tor fall in the realm of academic research & the software’s developers reportedly welcome any challenge. It is a form of digital currency & a payment system that people all over the world can use to make transactions over the Internet. It's also a type of cryptocurrency which means that the money exchanged can’t be linked to a real identity if the person wants to remain anonymous. Bitcoin is the first decentralized form of currency meaning that the system doesn’t have any administrators or a central repository. The user has a Bitcoin address which is an identifier composed of 26-35 alphanumeric characters & it represents the possible destination of a bitcoin payment. Sites or users need to use a global database known as the blockchain which keeps track of who has how much money at all times. The blockchain is a record of all transactions that have ever been made in the Bitcoin network that also keeps track of newly generated bitcoin. This means that all users know each other’s bitcoin value. The process of generating bitcoins is called mining. The difficulty of the problem increases based on the speed of decryption so that a single block is decrypted every ten minutes. The dark web is not the same thing as the deep web but instead only represents a small part of it. The deep web refers to any site that can’t be accessed through traditional search engines while the dark web represents a part of the deep web that has been hidden intentionally. The most famous content on the dark web can be found in the Tor Network & accessed through Tor browsers. There seems to be no limit what can be found on the dark web. Content includes numerous scams, child pornography, cannibal sites, the sexualized torture & killing of animals, porn that would be banned anywhere else or live torture rooms. Bitcoins may be used to buy anything from fake documents to illegal drugs & weapons or the services of hackers & hitmen. Named after an ancient network of trade routes, the deep web’s Silk Road was an online black market & the first modern darknet market.This means that it could only be accessed with specific configurations, authorization or software. After a development process of 6 months, the Silk Road was launched in February 2011 & it became known as a platform for selling a wide variety of illegal drugs. In October 2013, Ross William Ulbricht, the person suspected of being the Silk Road’s founder under the pseudonym ‘Dread Pirate Roberts’, was arrested by the FBI. He was charged with money laundering, & computer hacking & conspiracy to traffic narcotics & sentenced to life in prison without the possibility of parole. His net worth at the time of his arrest was estimated at $28.5 million. Transactions that took place on the Silk Road were conducted with bitcoins. Circada 3301 was the name attributed to a secret organization that on six occasions published a series of complex puzzles with the purpose of recruiting highly intelligent individuals. Even though the puzzles were posted on different platforms, it was claimed that most of the clues could be found on the deep web. The puzzles focused on steganography, cryptography & data security. Mariana’s Web is an umbrella term used in reference to what lies in the deepest part of the Internet. Some believe that Mariana’s Web is actually an artificial intelligence entity. Others claim that it’s the place where you’ll find the most horrific things available on the deep web.
Views: 162066 They will Kill You
Brucon 2009: Transition to IPv6 on the Internet: Threats and Mitigation Techniques 5/6
 
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Clip 5/6 Speaker: Eric Vyncke Abstract: While IPv6 security is relatively well known in European Universities, most enterprises and service providers had little exposure to it. This is becoming really worrying because Microsoft Vista, 2008 includes IPv6 and IPv6 is even the preferred communication protocol. While this is probably a good thing, the transition mechanisms (notably the tunneling) can lead to risk exposure... The IPv4-address exhaustion is for 2010, this means that the migration to IPv6 is happening and that it is urgent to expose the security community to IPv6 with the latest news (like secure neighbor discovery which has been designed to secure the ARP-like function with cryptographically generated addresses). The session also cover the threats linked to the dual-stack approach and the use of carrrier grade NAT. For the presentation go to: http://www.brucon.org/material/evyncke_brucon_ipv6_security_60_minutes.pdf
Views: 238 Christiaan008
Bitcoin python tutorial for beginners - keys and address
 
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This video is for people who wants to use (almost) raw python code to create a private and a public Bitcoin keys and to convert them to Bitcoin address. In this video I'm using the external libraries: ecdsa and base58 You can watch the complete code on github: https://github.com/Shultzi/Mybitcoin My blog: http://zeltsinger.com/ I suggest that you'll also make sure you're familiar with the following concepts. hexadecimal basics by Corey Schafer: https://www.youtube.com/watch?v=ZL-LhaaMTTE ASCII Tutorial by dizauvi (3 videos): https://www.youtube.com/watch?v=B1Sf1IhA0j4 Big Endian vs Little Endian by Michael Cote: https://www.youtube.com/watch?v=JrNF0KRAlyo Bits vs Bytes as Fast As Possible by Techquickie: https://www.youtube.com/watch?v=Dnd28lQHquU Some recommended links: 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/Protocol_documentation bitcoin.org Developer documentation - https://bitcoin.org/en/developer-documentation If you loved this video, show me the love! BTC address: 1LxhkGzGu6q2LSfAGuH2DNBChmLhHkuQzP
Views: 5262 Shlomi Zeltsinger
Cryptography Concepts - CompTIA Security+ SY0-501 - 6.1
 
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Security+ Training Course Index: http://professormesser.link/sy0501 Professor Messer’s Course Notes: http://professormesser.link/501cn Frequently Asked Questions: http://professormesser.link/faq - - - - - The basics of cryptography are valuable fundamentals for building a secure network. In this video, you’ll learn about cryptographic terms, the value of the key, the concepts of confusion and diffusion, and more. - - - - - Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 10550 Professor Messer
Dash: QT Wallet Receiving Address = G15E18
 
05:48
Dash: QT Wallet Receiving Address What is : https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325335 How to: https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325343 Tipping Address: Xovo9BEAN3sKwxAAt5Knqdo1gqhodnzNu7 Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 2929 Dash
22. Cryptography: Encryption
 
01:24:15
MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Srinivas Devadas In this lecture, Professor Devadas continues with cryptography, introducing encryption methods. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 14604 MIT OpenCourseWare
Bitcoin QuickBits: What is the difference between public keys and addresses? Andreas Antonopoulos
 
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What is the difference between Bitcoin public keys and Bitcoin addresses? Bitcoin explained by Andreas M. Antonopoulos. More info on public keys, address's and mastering bitcoin https://github.com/bitcoinbook/bitcoinbook/blob/f8b883dcd4e3d1b9adf40fed59b7e898fbd9241f/ch04.asciidoc This clip is an excerpt from 'Bitcoin Q&A: Public keys vs. addresses' https://youtu.be/8es3qQWkEiU published under a creative commons licence https://creativecommons.org/ on 10 May 2018 by the aantonop YouTube channel https://www.youtube.com/user/aantonop Suggested videos: Bitcoin QuickBits: What happens to old Bitcoin addresses? https://youtu.be/yrNTsWP53NE The Bitcoin Lightning Network Explained https://youtu.be/Z7Q0AwbKZX8 How to keep your Bitcoin safehttps://youtu.be/bDVIe7xcXBY How likely is it that Bitcoin will become obsolete? https://youtu.be/tBnC9AhKjws Follow Andreas on Twitter @aantonop https://twitter.com/aantonop Subscribe to Andreas's YouTube channel https://www.youtube.com/user/aantonop Check out Andreas's website https://antonopoulos.com/ Support Andreas by becoming a Patreon https://www.patreon.com/aantonop Andreas is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; and “The Internet of Money,” a book about why bitcoin matters. The Internet of Money, v1 https://amzn.to/2uvNYEL The Internet of Money, v2 https://amzn.to/2LvXYEe Mastering Bitcoin 1st edition https://amzn.to/2uzaa0z Mastering Bitcoin 2nd edition https://amzn.to/2mvFSaS Follow Bitcoinboy on Twitter @BitCoinBoy https://twitter.com/BitCoinBoy If you'd like to support this channel 1BtCboyxPL4WNutwq79oqsQ5Vc25SchoZp About the Creative Commons Licence: One goal of Creative Commons is to increase the amount of openly licensed creativity in “the commons” — the body of work freely available for legal use, sharing, repurposing, and remixing. Through the use of CC licenses, millions of people around the world have made their photos, videos, writing, music, and other creative content available for any member of the public to use. End screen music: TeknoAXE's Royalty Free Music - Cavern Starting Area 1 https://youtu.be/1DtfwcfXJss Peter Schiff, finance, economy, silver, stock, fintech, currency, investing, forex, usd, profit, retirement, economics, value, hangouts on air, 2017, 2018, 2019, 2020, nem #bitcoin #technology #cryptocurrency, #2017, #2018, #2019, #2020, #gold, #silver, #ethereum, #money, #finance, #economy, #recession, #stocks, #wallstreet, #investing
Views: 164 Bitcoinboy
Cryptography: The Math of the Public Private Key of RSA
 
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Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! :) https://www.patreon.com/patrickjmt !! Part 1: https://youtu.be/PkpFBK3wGJc Please consider being a supporter on Patreon! https://www.patreon.com/patrickjmt Twitter: @Patrick_JMT In this video I show mathematically for RSA encryption works by going through an example of sending an encrypted message! If you are interested in seeing how Euclid's algorithm would work, check out this video by Emily Jane: https://www.youtube.com/watch?v=fz1vxq5ts5I A big thanks to the 'Making & Science team at Google' for sponsoring this video! Please like and share using hashtag #sciencegoals
Views: 34817 patrickJMT
How to Trace a Bitcoin Transaction using a Bitcoin receiving address
 
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The Crypto Dad shows you how to trace a Bitcoin transaction. Important software used is: Electrum bitcoin wallet: https://electrum.org/#home The Blockchain explorer: https://blockchain.info/ X-Mirage Mirroring Software: http://www.x-mirage.com/ Get the Blockchain Bitcoin Wallet App! https://itunes.apple.com/us/app/blockchain-bitcoin-wallet/id493253309 Donate Bitcoins: 1JBxwXG8P6PYKKsrHKzQduM8s8RoV3dnjr
Views: 8721 Rex Kneisley
Ever wonder how Bitcoin (and other cryptocurrencies) actually work?
 
26:21
Bitcoin explained from the viewpoint of inventing your own cryptocurrency. Videos like these made possible by patreon: https://patreon.com/3blue1brown Protocol Labs: https://protocol.ai/ Interested in contributing? https://protocol.ai/join/ Special thanks to the following patrons: http://3b1b.co/btc-thanks Some people have asked if this channel accepts contributions in cryptocurrency form as an alternative to Patreon. As you might guess, the answer is yes :). Here are the relevant addresses: ETH: 0x88Fd7a2e9e0E616a5610B8BE5d5090DC6Bd55c25 BTC: 1DV4dhXEVhGELmDnRppADyMcyZgGHnCNJ BCH: qrr82t07zzq5uqgek422s8wwf953jj25c53lqctlnw LTC: LNPY2HEWv8igGckwKrYPbh9yD28XH3sm32 Supplement video: https://youtu.be/S9JGmA5_unY Music by Vincent Rubinetti: https://soundcloud.com/vincerubinetti/heartbeat Here are a few other resources I'd recommend: Original Bitcoin paper: https://bitcoin.org/bitcoin.pdf Block explorer: https://blockexplorer.com/ Blog post by Michael Nielsen: https://goo.gl/BW1RV3 (This is particularly good for understanding the details of what transactions look like, which is something this video did not cover) Video by CuriousInventor: https://youtu.be/Lx9zgZCMqXE Video by Anders Brownworth: https://youtu.be/_160oMzblY8 Ethereum white paper: https://goo.gl/XXZddT Music by Vince Rubinetti: https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown ------------------ 3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe, and click the bell to receive notifications (if you're into that). If you are new to this channel and want to see more, a good place to start is this playlist: http://3b1b.co/recommended Various social media stuffs: Website: https://www.3blue1brown.com Twitter: https://twitter.com/3Blue1Brown Patreon: https://patreon.com/3blue1brown Facebook: https://www.facebook.com/3blue1brown Reddit: https://www.reddit.com/r/3Blue1Brown
Views: 2171493 3Blue1Brown
How Bitcoin Works in 5 Minutes (Technical)
 
05:26
A short introduction to how Bitcoin Works. Want more? Check out my new in-depth course on the latest in Bitcoin, Blockchain, and a survey of the most exciting projects coming out (Ethereum, etc): https://app.pluralsight.com/library/courses/bitcoin-decentralized-technology Lots of demos on how to buy, send, store (hardware, paper wallet). how to use javascript to send bitcoin. How to create Ethereum Smart Contract, much more. Written Version: http://www.imponderablethings.com/2014/04/how-bitcoin-works-in-5-minutes.html Less technical version: https://www.youtube.com/watch?v=t5JGQXCTe3c Donation address: 1K7A6wsyxj6fThtMYcNu6X8bLbnNKovgtP Germain caption translation provided by adi331 : 19s6rqRfHa19w7wcgwtCumPs1vdLDj1VVo (thanks!!)
Views: 5564072 CuriousInventor
Blockchain tutorial 16: Bitcoin compressed and uncompressed addresses
 
09:48
This is part 16 of the Blockchain tutorial explaining what Bitcoin compressed and uncompressed addresses 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: 3214 Mobilefish.com
Bitcoin Q&A: How do mnemonic seeds work?
 
07:45
What cryptography *magic* makes mnemonic seed words work? How is randomness generated? Can seed words be imported into more than one wallet? More on wallets and mnemonic code words - https://github.com/bitcoinbook/bitcoinbook/blob/f8b883dcd4e3d1b9adf40fed59b7e898fbd9241f/ch05.asciidoc BIP39 - Mnemonic code for generating deterministic keys https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki BIP32 - Hierarchical deterministic wallets https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki These questions are from the MOOC 9.4 session which took place on March 9th, 2018. Andreas is a teaching fellow with the University of Nicosia. The first course in their Master of Science in Digital Currency degree, DFIN-511: Introduction to Digital Currencies, is offered for free as an open enrollment MOOC course to anyone interested in learning about the fundamental principles. If you want early-access to talks and a chance to participate in the monthly live Q&As with Andreas, become a patron: https://www.patreon.com/aantonop RELATED: How do I choose a wallet? - https://youtu.be/tN6b62sEpsY Hot vs. cold wallets - https://youtu.be/Aji_E9sw0AE Secure, tiered storage system - https://youtu.be/uYIVuZgN95M How do I secure my bitcoin? - https://youtu.be/vt-zXEsJ61U HODLing and the "get free" scheme - https://youtu.be/MhOwmsW1YNI How to get people to care about security - https://youtu.be/Ji1lS9NMz1E Airdrop coins and privacy implications - https://youtu.be/JHRnqJJ0rhc The price of losing privacy - https://youtu.be/2G8IgiLbT_4 Bitcoin as everyday currency - https://youtu.be/xYvvSV4mjH0 Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in bitcoin. Follow on Twitter: @aantonop https://twitter.com/aantonop Website: https://antonopoulos.com/ He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters. THE INTERNET OF MONEY, v1: https://www.amazon.co.uk/Internet-Money-collection-Andreas-Antonopoulos/dp/1537000454/ref=asap_bc?ie=UTF8 [NEW] THE INTERNET OF MONEY, v2: https://www.amazon.com/Internet-Money-Andreas-M-Antonopoulos/dp/194791006X/ref=asap_bc?ie=UTF8 MASTERING BITCOIN: https://www.amazon.co.uk/Mastering-Bitcoin-Unlocking-Digital-Cryptocurrencies/dp/1449374042 [NEW] MASTERING BITCOIN, 2nd Edition: https://www.amazon.com/Mastering-Bitcoin-Programming-Open-Blockchain/dp/1491954388 Subscribe to the channel to learn more about Bitcoin & open blockchains! Music: "Unbounded" by Orfan (https://www.facebook.com/Orfan/) Outro Graphics: Phneep (http://www.phneep.com/) Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)
Views: 10220 aantonop
Dash: QT Wallet Private Key Export/Import = G15E17
 
10:44
Dash: QT Wallet Private Key Export/Import What is : https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325335 How to: https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325343 Tipping Address: Xovo9BEAN3sKwxAAt5Knqdo1gqhodnzNu7 Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 4865 Dash
Blockchain tutorial 2: Random numbers
 
03:06
This is part 2 of the Blockchain tutorial explaining what random numbers 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: 7232 Mobilefish.com
Best secure and private email services review - guide to Gmail alternatives and encrypted email
 
16:41
Secure your privacy and claim a new encrypted email at these secure and private email services. Follow my guide to gmail alternatives and end-to-end encryption using private email providers as part of degoogleify campaign. Help me build the first crypto-funded channel on YouTube by donating to one of my addresses. Bitcoin: 1C7UkndgpQqjTrUkk8pY1rRpmddwHaEEuf Dash Xm4Mc5gXhcpWXKN84c7YRD4GSb1fpKFmrc Litecoin LMhiVJdFhYPejMPJE7r9ooP3nm3DrX4eBT Ethereum 0x6F8bb890E122B9914989D861444Fa492B8520575 Tutanota.com review 5:20 Mailfence.com review 8:20 Disroot.org review 10:42 Protonmail.com review 12:54 Secure and private email service - De-googleify yourself! End-to-end encryption protects your email messages from being stolen by hackers, read by spies, or used by Google or Microsoft for targeted advertising. Encrypted email is essential for protection of your online privacy, security, and digital rights. Mainstream email providers like Yahoo Mail, Gmail, or Hotmail, don't offer you end-to-end encryption because that would jeopardize their business model. However, your personal email should be completely private and not read by companies to make a profit off of you. Luckily, there are plenty of gmail/yahoo/hotmail alternatives that keep your messages private and secure from prying eyes of advertisers and governments. Don't expose your private email messages to hackers, cyber criminals, identity thieves, and governments around the world you can’t trust. Sign up with one of these secure and private email providers for an encrypted email. All of these private email services offer free basic entry for account creation, end-to-end encryption using asymmetric public key cryptography, public cause and activism, anonymous sign-up. What is end-to-end encryption, public key cryptography and asymmetric encryption? Asymmetric encryption is the one where users generate two keys to encrypt their data – a private key, and a public key. When someone wants to contact you securely, they use your public key to encrypt the message. To read the message when you receive it, you decrypt it with your private key. Since public keys are available to everyone, you need to make sure nobody tried to spoof your identity using your public key to impersonate you and communicate with your contacts. Tutanota.com encrypted email service review utanota is a free and open source email service based in Germany. The name stems from Latin and translates as “secure message”. Tutanota user experience feels very nice and smooth. Intuitive, logical, nothing new to learn. This is exactly what a privacy email alternative should look like. The basic option is 1 GB of free space that you can devote to your emails and contacts. Tutatona offers you a premium version. It’s possible to send encrypted messages via Tutanota’s application to external accounts. You first set up a contact and enter a password that your recipient needs to know before you send an encrypted message. As soon as you hit send, your contact will receive a notification email with a link that will direct them to a secure application of Tutanota, where they can read and reply to your message confidentially, with end-to-end encryption. This allows you to send encrypted messages to any email account, be it gmail, yahoomail, or Protonmail. Mailfence.com secure and private email review This is another end-to-end encryption email service but unlike Tutanota, Mailfence supports OpenPGP so that you can manually exchange encryption keys independent from Mailfence servers. The website’s interface is also simple and clean-looking. Basic account will give you 200 MB in messages and additional 500 MB for documents. You can upgrade for 5 and 12 GB plan with unlimited calendars and contacts, or get a pro account with 30 GB in messages and 24 in documents for only a little over 8 bucks a month. Disroot.org protect your privacy review Disroot is one of the two services on this list that similarly to mailfence, enables you to use third party mail clients via POP or IMAP to store your messages locally. Disroot is an encrypted email service with SSL and TLS to transfer your messages as “envelope” and not a “postcard”. Protonmail.com Swiss-based encrypted and secure email review Swiss based encrypted email service developed by scientists from CERN and MIT, Protonmail offers top security and privacy in their end-to-end encrypted webmail application. Protonmail offers two-factor-authentification, but you can also create separate mailbox password. Credits: Instrumentals Real Chill and Spite, Momentum, Faded Nights, Now by https://www.youtube.com/user/CHUKImusic Chill Wave and Shadowlands 4 by Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/ EFF Flickr images Follow me: https://twitter.com/The_HatedOne_ https://www.reddit.com/user/The_HatedOne/ https://www.minds.com/The_HatedOne
Views: 24430 The Hated One
Cryptographic Hash Functions
 
49:38
Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
Views: 12045 nptelhrd
MIT's Cryptographic System "Sieve" will help Web Users to control their Personal Data
 
01:29
Most people with smartphones use a range of applications that collect personal information and store it on Internet-connected servers . And, they use similar application s from their Laptop and Desktop also. Some use still other Internet-connected devices, such as thermostats or fitness monitors, that also store personal data online. Generally, users have no idea which data items their apps are collecting, where they’re stored, and whether they’re stored securely. Researchers at MIT and Harvard University hope to change that, with an application they’re calling Sieve. With Sieve, a Web user would store all of his or her personal data, in encrypted form, on the cloud. Any app that wanted to use specific data items would send a request to the user and receive a secret key that decrypted only those items. If the user wanted to revoke the app’s access, Sieve would re-encrypt the data with a new key. Sieve required the researchers to develop practical versions of two cutting-edge cryptographic techniques called attribute-based encryption and key homomorphism Privacy and security are becoming important, the debate between Apple's iPhone encryption and the FBI proves that. This new Cryptographic system would help to address privacy and security issues. News Source: http://news.mit.edu/2016/secure-user-controlled-app-data-0318
Frequency stability property short film | Computer Science | Khan Academy
 
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Can you tell the difference between actions based upon flipping a coin and those based upon blind guessing or simulating randomness? This short video examines the frequency stability property. Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/case-study-ww2-encryption-machines?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/one-time-pad?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Computer Science on Khan Academy: Learn select topics from computer science - algorithms (how we solve common problems in computer science and measure the efficiency of our solutions), cryptography (how we protect secret information), and information theory (how we encode and compress information). About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Computer Science channel: https://www.youtube.com/channel/UC8uHgAVBOy5h1fDsjQghWCw?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 381167 Khan Academy
Bitcoin 101 - Quindecillions & The Amazing Math Of Bitcoin's Private Keys
 
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How do you slow down hackers and provide equal access to everyone on earth? Not easy. But Bitcoin's solution is devilishly simple, employing outrageously big numbers. Bitcoin's private keys are made of numbers (called quindecillions) that are so large, they literally choke the best computers. In fact even if all the world's computers were able to work together, these numbers would still be too large. By using an analogy to drawers and pirates, James dives into this math, revealing not only how simple the idea is, but how well it works. 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 https://blockchain.info/address/1javsf8GNsudLaDue3dXkKzjtGM8NagQe Thanks, James Follow me on Twitter @JamesGDAngelo
Views: 48572 CRI
ETHOS - What is Ethos - How It Works - Ethos Cryptocurrency Review
 
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ETHOS - What is Ethos - How It Works - Ethos Cryptocurrency Review ★ BUY ETHOS HERE ➤ http://iqopts.com/ethos ★ TRADE OTHER CURRENCIES ➤ http://coinbyte.net/trade It’s also used in making Bitcoin addresses, therefore improving safety and privateness. It is approximated you will find as many options to SHA 256 as you can find grains of sand on earth, making the economics of looking to crack it making use of brute power techniques unviable. Begin to see the area on ‘Evidence of labor’ To find out more about the basics of its software to blockchain technology. There's a whole lot to learn and keep track of. A common System that provides uncomplicated accessability and Discovering System would be some thing immense if introduced effectively. Has the chance to be the primary entirely functional and dealing universal wallet which has a mobile application Andrew is a knowledge engineer that's chargeable for producing serious-time crypto industry data accessible to the Ethos platform. His history in economic model growth, information assortment, and algorithmic investing is helping him generate Main services in Ethos Bedrock. Ahead of signing up for Ethos, Andrew labored on significant effectiveness device Mastering pipelines for large money institutions, although setting up cryptocurrency investing bots and economic models in his spare time. Mia Alexander is usually a DevOps Engineer at Ethos, she includes a wealth of working experience in cloud computing and blockchain infrastructure development. Mia at this time holds a fundamental position at MyCrypto, a customer aspect interface for the Ethereum blockchain and Earlier held a posture at MyEtherWallet, assisting both equally in building a scalable blockchain infrastructure. There are many distinctive functions designed into the wallet, such as the chance to sign up and confirm a personal or small business identify hooked up to the wallet, essentially taking away the need for any cryptographic tackle. This self-custodied common wallet makes it possible for the person to properly retailer, deal with and even further monetize their crypto belongings in just one place. This venture is de facto Practically just in time to take care of the surging adoption. Communicative dev crew, fantastic eyesight, and cult community next. Won't be able to wait until the product is introduced!!! Microchips or processors developed and created to complete the hugely precise process of mining cryptocurrency. Bitcoin ASICs came into existence in 2013, vastly outperforming present technologies at the time. Several look at the utilization of ASICs mining for being incompatible Using the decentralized eyesight of cryptocurrency, since it is generally a technological know-how available by People having a significant diploma of get more info specialized know-how and funding. Also, a single aspect of these products is the opportunity for Actual physical problems, decline or theft. Even so, the benefits of these kinds of resources is that they are much not as likely to generally be prone to application theft, generally referred to as hacking. Shopper Aid might be working together as being a workforce dependent within the world to make certain your concerns get answered and issues get resolved to your comprehensive pleasure. All of The client Guidance Brokers are really keen about what we do listed here at Ethos, we are not able to ask for a far more strong base to construct on! Vishal Karir, CFA, is usually a Portfolio Supervisor and Quantitative Financial investment Researcher with in excess of 17 yrs of expense and know-how experience at BlackRock and Morgan Stanley. Vishal managed BlackRock’s Target Allocation resources with $one.5 billion in belongings less than management. Moreover, Vishal was to blame for the event and management of a range of BlackRock model portfolios (ETF primarily based portfolio answers), like outcome-oriented and full return asset allocation strategies. These design portfolios have been followed by above 15,000 fiscal advisors during the US. Vishal’s expenditure exploration at BlackRock was largely focused on fairness markets. He designed investment alerts by applying machine Studying algorithms to research massive volumes of all-natural language textual content. A engineering allowing for two distinct end users to right exchange cryptocurrencies belonging to independent blockchains, with none 3rd-celebration or intermediary e.g. XRP to Ethos. The technology remains in its nascent stages, and while progress is currently being created, you'll find related risks included. At this time, the sole viable choice is to work with an exchange, which involves buying and selling the original cryptocurrency i. Ethos’ intention is easy — to help make the cryptocurrency marketplace available to Every person throughout the world by utilizing blockchain.
Views: 6795 Crypto Investing
Bitcoin 101 - Merkle Roots and Merkle Trees - Bitcoin Coding and Software - The Block Header
 
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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: 33267 CRI
How To Create An Ethereum Account
 
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How To Create An Ethereum Account http://www.Blockgeeks.com Today, we'll be learning about Ethereum accounts and the math behind creating one. To interact with Ethereum in any meaningful way, you need to have a user account. The simplest way to create an account on Ethereum is by using the Mist e-theorem wallet, which is an application that allows you to manage and interact with multiple Ethereum accounts. Launching the application will sync to the black chain, meaning it download the entire block chain data to your computer, which can take upwards of 100 gigabytes, so be warned. when you first launch the application, it will walk you through creating an account and setting a password for it. It's very important that you never forget this password to maintain access to the account, there is no forgot your password option. Your new account then shows up in the wallet section of the app and it has a balance of zero. Clicking on the account will give us more details about it and provide some options for putting some real ether into it. The main thing to note is the public address, which you will share with other people. Another way to create an account is via the command line. If you download the Go Ethereum Client of GETH, can simply invoke GETH account new to create an account. This will prompt you to enter a password which again you should never forget and at the end it prints out the public address of your new account. You can create as many accounts as you like and you can view them all by typing GETH Account List. Note that this also shows the account we created in Ethereum Wallet. Another interesting thing to note is that we don't even have to be connected to the block chain or even the internet to create an account. It can happen entirely offline. How is this possible? We know what we need to generate a cryptographic key pair which consists of a public and private key. But don't we have to register this key pair somewhere? What if someone else is already using this key pair? Even though it's technically possible, it is highly, highly, improbable. Let's talk about why. There are three steps involved in generating an Ethereum public address. The first step is to generate a private key which is just a random number represented by 256 bits. The second step is to use elliptic curve cryptography to generate a 512 bit public key. Each private key maps to exactly one public key. The third and final step is to calculate the Keccak256 has of the public key and then keep the right most 160 bits of the Keccak256 hash to get the public address. This is essentially a mapping of 256 bit private keys to 160 bit public addresses. Meaning each account has more than one private key. Security is achieved in the randomness of selecting the private key. As long as you get something sufficiently random and not like one or two, it's highly unlikely that someone else would also generate the same private key. To give you a sense of how many possible private keys there are let's take a look at some numbers. There are 10,000 possible four digit iPhone passcodes. So if someone were to try to break into your phone by guessing each passcode, it would be pretty hard because they would have a one 1 in 10,000 chance of getting it right. But it would be fairly easy for a computer to try 10,000 passcodes pretty quickly. Apple also claims a 1 in 50,000 chance of a fingerprint ID matching a strangers and a 1 in a million chance of a face ID matching making your phone more secure. At a few orders of magnitude larger to we have seven and a half billion humans on the planet and we estimate that the big bang took place some 14 billion years ago. Larger still we estimate around 400 billion different stars just in our own galaxy. Many, many orders of magnitude larger still, we estimate that there are around seven times 10 to the power of 27 atoms in the average adult male weighing 150 pounds. Many orders larger still we estimate that are 1.3 times 10 to the power of 50 atoms in the earth. And even larger still, we come to the total number of possible private keys using 256 bits, one times 10 to the power of 77. This number is so big that if we took all the numbers we just talked about before and added them all up, they still wouldn't even be half of this number. It's unbelievably big. So the chances of someone randomly generating the same private key is sufficiently that it's practically impossible. Staging a brute force attack by trying each possible private key would also require an unachievable amount of computational power, like a planet sized computer working since the beginning of time. To learn more about Ethereum accounts and using wallets, check out our online guides and courses at Blockgeeks.com. Thank for watching and see you next time.
Views: 47214 Blockgeeks
How Bitcoin Addresses Are Generated - How To Generate Bitcoins
 
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You can join using this link: http://tinyurl.com/68nvpi42my Begin generating Zcash, bitcoins as well as ethereum as soon as possible Bitclubnetwork mining pool. What exactly is B C N and just how does it work? BitClub works a pair of mining areas with all the fastest growing facility situated in Iceland. This particular facility is accessible to the public that fulfill particular requirements regarding visitation privileges. The mining pool is accessible to public to ensure anyone who wish to lead hashing power can simply accomplish this. Everybody is able to register and become part of it if you meet the criteria They buy all mining devices which helps the bitclub to maintain full control and just sell the hardware within the secondary industry when it is getting close to the end of it's maximum routine. The operators exchange these out with regard to more recent and much more productive units. Should they sell a older portion of devices our people are capable of consider getting the miner once they choose. Each and every BitClub member helps lead for the functions in the mining pool simply by "chipping in" Bitcoin to pay for this. This repurchase method is what permits us to continuously develop and buying more mining components. How Bitcoin Addresses Are Generated? Bitcoin is really a worldwide currency that employs an open ledger process in order to record transactions being submitted anyone to a different. All this happens without any central bank in the centre and it is not governed by government, controlling body, individual business, or person. All transactions happen to be completely clear plus a multitude of duplicates from the ledger are actually kept across a distributed network with computer systems with no anchorman associated with failing. Basically, Bitcoin is actually actually a true decentralized currency that no-one can regulate and that's why most people are really looking forward to it. bitcoin business how, bitcoin how much is a bit and how bitcoin actually works.
Views: 153 Vidge R. Sall
Cryptography Research
 
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Cryptography Research IBM and the Future of Cyber Security By 2011, the world will be 10 times more instrumented than it was in 2006. Internet connected devices will leap from 500 Million to 1 Trillion. Approximately 70% of the digital universe is created by individuals, but enterprises are responsible for 85% of the security, privacy, reliability, and compliance. Increasingly, the proliferation of data-generating sensors and mobile computing devices, and the emergence of new forms of communication such as social networking, are driving unprecedented growth in the collection, storage and management of all types of data. Not surprisingly, this phenomenon has sparked growing demand for the ability to extract intelligence from these massive mountains of information—intelligence that can enable organizations to improve their decision-making and run their businesses more effectively and efficiently. With this capacity to rapidly sift thru data and gain new insights comes a significant challenge and responsibility when it comes to personal information, or information that relates to identifiable individuals: how to enable the exchange and analysis of data, while protecting privacy. IBM has long recognized the importance of information privacy and led by example in its own privacy polices and practices: the company was the first multinational to adopt a global privacy policy in the late 1960s, and continued that leadership as recently as 2005 when it was the first company to address genetic privacy. But policies and practices are not enough on their own to address the privacy challenges of an increasingly smarter planet. Thoughtfully-designed technologies can play a key role here, part of a paradigm that some are calling Privacy by Design. As the world becomes smarter and more interconnected, the capacity to rapidly sift through data to gain new insights brings with it a significant challenge and responsibility when it comes to personal information. How do we enable the exchange and analysis of data, while protecting privacy? IBM, which in the 1960s because the first multinational to adopt a global privacy policy and in 2005 was the first to address genetic privacy, has long recognized the importance of information privacy. Leading by example in its own privacy polices and practices, IBM has also received many patents for inventions that support our commitment to privacy leadership. For example, an IBM Researcher has solved a thorny mathematical problem that has confounded scientists since the invention of public-key encryption several decades ago. The breakthrough, called "privacy homomorphism," or "fully homomorphic encryption," makes possible the deep and unlimited analysis of encrypted information -- data that has been intentionally scrambled -- without sacrificing confidentiality. IBM's solution, formulated by IBM Researcher Craig Gentry, uses a mathematical object called an "ideal lattice," and allows people to fully interact with encrypted data in ways previously thought impossible. With the breakthrough, computer vendors storing the confidential, electronic data of others will be able to fully analyze data on their clients' behalf without expensive interaction with the client, and without seeing any of the private data. With Gentry's technique, the analysis of encrypted information can yield the same detailed results as if the original data was fully visible to all. Using the solution could help strengthen the business model of "cloud computing," where a computer vendor is entrusted to host the confidential data of others in a ubiquitous Internet presence. It might better enable a cloud computing vendor to perform computations on clients' data at their request, such as analyzing sales patterns, without exposing the original data. Other potential applications include enabling filters to identify spam, even in encrypted email, or protecting information contained in electronic medical records. The breakthrough might also one day enable computer users to retrieve information from a search engine with more confidentiality http://asmarterplanet.com/
Views: 13324 Social Media
Bitcoin Cryptocurrency for Beginners 💰
 
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ATTENTION: I AM NOT ON TELEGRAM!!! To anyone who is being approached under the scam please report to Telegram. How I got Rich off Bitcoin! We've all been hearing about it. What is Bitcoin? What is cryptocurrency? How do I invest my money into crypto? This video is for all my beginners so I had to break it down for you boos. Sign up for a coinbase & Kucoin A MUST for beginners: http://bit.ly/2CWkoh5 and Kucoin: http://bit.ly/2CZ9sz8 SUBSCRIBE to my channel for the latest videos: http://goo.gl/AlZhsT ---------- FTC: Not sponsored. I do have a coinbase account and if you put in $100 we both get $10 credited towards our account http://bit.ly/2CWkoh5 They have no idea who I am, I just want that COINT! ---------- GREAT RESOURCES: 7 Steps Beginners Guide for Crypto: http://bit.ly/7steps4beginners Don't understand terms? Look them up here: https://decryptionary.com/ Bitcoin is like the internet: https://www.youtube.com/watch?v=W0qn3oPYo5c View all the cryptocurrencies on the market and their price: https://coinmarketcap.com How to exchange your crypto: https://www.youtube.com/watch?v=A9oAGrftiis Reddit: https://www.reddit.com/r/ethtrader/comments/6r50c6/how_to_invest_in_cryptocurrencies_the_ultimate/ Quora: https://www.quora.com/topic/Cryptocurrencies Medium: https://medium.com/topic/cryptocurrency Articles https://www.bitcoinmining.com/ https://www.investopedia.com/terms/b/bitcoin-mining.asp https://www.washingtonpost.com/news/energy-environment/wp/2017/12/19/why-the-bitcoin-craze-is-using-up-so-much-energy/?utm_term=.00310ace38ba Podcast: http://bit.ly/friendlybitcoin http://crypto101podcast.com/ https://itunes.apple.com/us/podcast/the-next-billion-seconds/id1286587583?mt=2&i=1000394378101 https://itunes.apple.com/us/podcast/lets-talk-crypto-bitcoin-blockchain-cryptocurrency/id1317162508?mt=2&i=1000397378376 https://itunes.apple.com/us/podcast/crypto-101/id1262351840?mt=2&i=1000396763135 ---------- GET TO KNOW ME http://shamelessmaya.com http://instagram.com/mayasworld http://twitter.com/mayasworld http://shamelessmaya.tumblr.com https://www.facebook.com/shamelessmaya https://www.snapchat.com/add/mayasnapworld ---------- SHOP MY FILMING GEAR HERE: http://bit.ly/mayatechshop If you do I'll earn a commission! ---------- About Shameless Maya "What would happen if I shamelessly promoted myself for 365 days?" My channel started out as a social media experiment and now it's a lifestyle. I hope my journey from shame to shameless inspires you and others to not be ashamed of who you are and to share and celebrate that shamelessly. Here on my channel, you'll find videos on lifestyle, inspiration, fun transformations, techie vids for aspiring geeks, beauty, fashion, and so much more.
Views: 1112771 Shameless Maya
DEF CON 22 - Dan Kaminsky - Secure Random by Default
 
01:38:53
Secure Random By Default Dan Kaminsky Chief Scientist, White Ops As a general rule in security, we have learned that the best way to achieve security is to enable it by default. However, across operating systems and languages, random number generation is always exposed via two separate and most assuredly unequal APIs -- insecure and default, and secure but obscure. Why not fix this? Why not make JavaScript and PHP and Java and Python and even libc rand() return strong entropy? What are the issues stopping us? Should we just shell back to /dev/urandom, or is there merit to userspace entropy gathering? How does fork() and virtualization impact the question? What of performance, and memory consumption, and headless machines? Turns out the above questions are not actually rhetorical. Just because a change might be a good idea doesn't mean it's a simple one. This will be a deep dive, but one that I believe will actually yield a fix for the repeated *real world* failures of random number generation systems. Dan Kaminsky has been a noted security researcher for over a decade, and has spent his career advising Fortune 500 companies such as Cisco, Avaya, and Microsoft.Dan spent three years working with Microsoft on their Vista, Server 2008, and Windows 7 releases. Dan is best known for his work finding a critical flaw in the Internet’s Domain Name System (DNS), and for leading what became the largest synchronized fix to the Internet’s infrastructure of all time. Of the seven Recovery Key Shareholders who possess the ability to restore the DNS root keys, Dan is the American representative. Dan is presently developing systems to reduce the cost and complexity of securing critical infrastructure.
Views: 24143 DEFCONConference
Bitcoin Mining Explained
 
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We are miners from 2013 looking to create community and help train and learn together as blockchain tech changes so quickly. Leave your thoughts in the comments, call in, ask us anything. Thank you for your time it means a lot to us. This is where you get that rig hosted and mine coins all day long! https://www.digie.io All the great Merchandise 10% off! http://allthingsdecentral.com?aff=650 ✨Bitcoin coins!✨ http://amzn.to/2u1VkRQ 💰To get Bitcoin start here!💰 https://www.coinbase.com/join/5822284a3239de006a91b885 📈Support the Channel with Crypto:📈 BTC- 1FUyrbMx3STdpkhJKpjNwLkn8kYBQFJQPA ETH- 0xe02135195519D35D16615bBE2fA2Aa40ce0baECE LTC- LUkeeDhPmmS9S2mMJCwNzt2xoYwgy3En9R 🦊Fellow Friend Channels🦊 Ben teaches you step by step what to do! https://www.youtube.com/channel/UChzLnWVsl3puKQwc5PoO6Zg All about your rig build https://www.youtube.com/user/BitsBeTrippin Crypto info news https://www.youtube.com/channel/UCHnmFRbEPiN0rX_0WaEfZsA Interviews https://www.youtube.com/channel/UClMX3Ln3JLo6CzGvA-JAE9A Trey’s Life https://www.youtube.com/channel/UCVH62tKvfMJS14Fc-6E1DPA/featured?view_as=public 📡Social Sites📡 Facebook Group- http://Facebook.com/groups/DigitalGoldGroup Twitch- https://www.twitch.tv/digitalgold_ Mixer- https://mixer.com/DigitalGold_llc Twitter- https://twitter.com/DigitalGold_LLC Website: https://www.digie.io Email us: info@digie.io 📝Rules for the chat📝 Zero tolerance for foul language this is a family friendly place. Do not spam Stop posting addresses Respect fellow humans Use @digitalgold to get your question answered -~-~~-~~~-~~-~- Please watch: "Life of a Miner, From Altcoins to Bitcoins over 4 years " https://www.youtube.com/watch?v=heiPMY9gOWg -~-~~-~~~-~~-~-
Views: 482629 Digital Gold
Bitcoin-Wallet-the-address
 
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http://www.gobitcoin24.com http://moblr.io/D0zKG Bitcoin Wallet the address A bitcoin wallet consists of two 'keys'. The one you'll already likely be familiar with is the public key, which is your wallet address and is how other people send bitcoins to you. The other part of your bitcoin wallet is the private key. It is this that enables you to send bitcoins to other people. The combination of the recipient's public key and your private key is what makes a cryptocurrency transaction possible. It is important to understand that, if anyone else obtains the private key of your wallet, they can withdraw your funds -- this is why it's absolutely essential that nobody else discovers it. So, if you keep your coins in either an online wallet, or a hard-drive-based software wallet, you are vulnerable to attacks by hackers or malware that can log your keystrokes. Furthermore, a stolen PC or a hard-drive crash could also see you waving bye-bye to your digital treasure. Used with care, a paper wallet can protect you from these possibilities.
Views: 79 BitCoin24
Blockchain tutorial 7: Modulo operation
 
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This is part 7 of the Blockchain tutorial explaining what a modulo operation 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: 4713 Mobilefish.com
CppCon 2017: Matt Kulukundis “Designing a Fast, Efficient, Cache-friendly Hash Table, Step by Step”
 
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http://CppCon.org — Presentation Slides, PDFs, Source Code and other presenter materials are available at: https://github.com/CppCon/CppCon2017 — Hash tables consume a large volume of both compute resources and memory across Google's production system. The design for hash tables in C++ traces its origins to the SGI STL implementation from 20 years ago. Over these years, computer architecture and performance has changed dramatically and we need to evolve this fundamental data structure to follow those changes. This talk describes the process of design and optimization that starts with std::unordered_map and ends with a new design we call "SwissTable", a 2-level N-way associative hash table. Our implementation of this new design gets 2-3x better performance with significant memory reductions (compared to unordered_map) and is being broadly deployed across Google. — Matt Kulukundis: Google, Senior Software Engineer Matt is a senior software engineer on the C++ libraries team at Google. Prior to Google he has worked on compilers, machine learning, and underwater robotics. In his free time, he scuba dives in warm places. — Videos Filmed & Edited by Bash Films: http://www.BashFilms.com
Views: 14368 CppCon