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Public Key Cryptography - Computerphile
 
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Spies used to meet in the park to exchange code words, now things have moved on - Robert Miles explains the principle of Public/Private Key Cryptography note1: Yes, it should have been 'Obi Wan' not 'Obi One' :) note2: The string of 'garbage' text in the two examples should have been different to illustrate more clearly that there are two different systems in use. http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels
Views: 427961 Computerphile
Symmetric Key and Public Key Encryption
 
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Modern day encryption is performed in two different ways. Check out http://YouTube.com/ITFreeTraining or http://itfreetraining.com for more of our always free training videos. Using the same key or using a pair of keys called the public and private keys. This video looks at how these systems work and how they can be used together to perform encryption. Download the PDF handout http://itfreetraining.com/Handouts/Ce... Encryption Types Encryption is the process of scrambling data so it cannot be read without a decryption key. Encryption prevents data being read by a 3rd party if it is intercepted by a 3rd party. The two encryption methods that are used today are symmetric and public key encryption. Symmetric Key Symmetric key encryption uses the same key to encrypt data as decrypt data. This is generally quite fast when compared with public key encryption. In order to protect the data, the key needs to be secured. If a 3rd party was able to gain access to the key, they could decrypt any data that was encrypt with that data. For this reason, a secure channel is required to transfer the key if you need to transfer data between two points. For example, if you encrypted data on a CD and mail it to another party, the key must also be transferred to the second party so that they can decrypt the data. This is often done using e-mail or the telephone. In a lot of cases, sending the data using one method and the key using another method is enough to protect the data as an attacker would need to get both in order to decrypt the data. Public Key Encryption This method of encryption uses two keys. One key is used to encrypt data and the other key is used to decrypt data. The advantage of this is that the public key can be downloaded by anyone. Anyone with the public key can encrypt data that can only be decrypted using a private key. This means the public key does not need to be secured. The private key does need to be keep in a safe place. The advantage of using such a system is the private key is not required by the other party to perform encryption. Since the private key does not need to be transferred to the second party there is no risk of the private key being intercepted by a 3rd party. Public Key encryption is slower when compared with symmetric key so it is not always suitable for every application. The math used is complex but to put it simply it uses the modulus or remainder operator. For example, if you wanted to solve X mod 5 = 2, the possible solutions would be 2, 7, 12 and so on. The private key provides additional information which allows the problem to be solved easily. The math is more complex and uses much larger numbers than this but basically public and private key encryption rely on the modulus operator to work. Combing The Two There are two reasons you want to combine the two. The first is that often communication will be broken into two steps. Key exchange and data exchange. For key exchange, to protect the key used in data exchange it is often encrypted using public key encryption. Although slower than symmetric key encryption, this method ensures the key cannot accessed by a 3rd party while being transferred. Since the key has been transferred using a secure channel, a symmetric key can be used for data exchange. In some cases, data exchange may be done using public key encryption. If this is the case, often the data exchange will be done using a small key size to reduce the processing time. The second reason that both may be used is when a symmetric key is used and the key needs to be provided to multiple users. For example, if you are using encryption file system (EFS) this allows multiple users to access the same file, which includes recovery users. In order to make this possible, multiple copies of the same key are stored in the file and protected from being read by encrypting it with the public key of each user that requires access. References "Public-key cryptography" http://en.wikipedia.org/wiki/Public-k... "Encryption" http://en.wikipedia.org/wiki/Encryption
Views: 479881 itfreetraining
Public key cryptography - Diffie-Hellman Key Exchange (full version)
 
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The history behind public key cryptography & the Diffie-Hellman key exchange algorithm. We also have a video on RSA here: https://www.youtube.com/watch?v=wXB-V_Keiu8
Views: 627381 Art of the Problem
Secret Key Exchange (Diffie-Hellman) - Computerphile
 
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How do we exchange a secret key in the clear? Spoiler: We don't - Dr Mike Pound shows us exactly what happens. Mathematics bit: https://youtu.be/Yjrfm_oRO0w Computing Limit: https://youtu.be/jv2H9fp9dT8 https://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 217705 Computerphile
How secure is 256 bit security?
 
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Supplement to the cryptocurrency video: How hard is it to find a 256-bit hash just by guessing and checking? What kind of computer would that take? Cryptocurrency video: https://youtu.be/bBC-nXj3Ng4 Thread for Q&A questions: http://3b1b.co/questions Several people have commented about how 2^256 would be the maximum number of attempts, not the average. This depends on the thing being attempted. If it's guessing a private key, you are correct, but for something like guessing which input to a hash function gives a desired output (as in bitcoin mining, for example), which is the kind of thing I had in mind here, 2^256 would indeed be the average number of attempts needed, at least for a true cryptographic hash function. Think of rolling a die until you get a 6, how many rolls do you need to make, on average? 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: 1015541 3Blue1Brown
Encryption Concepts - Information Security Lesson #6 of 12
 
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Dr. Soper discusses encryption concepts. Topics covered include encryption algorithms, keyed and keyless cryptosystems, cryptanalysis, breaking encrypted messages, substitution, transposition, and product ciphers, the Caesar cipher, the Vigenère cipher, one-time pads, the Vernam cipher, book ciphers, symmetric and asymmetric cryptosystems, public-key encryption, stream ciphers, block ciphers, the data encryption standard (DES), and the advanced encryption standard (AES).
Views: 33126 Dr. Daniel Soper
NETWORK SECURITY - DES (DATA ENCRYPTION STANDARD) ALGORITHM
 
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DES algorithm follows the Feistel Structure Most of the Block cipher algorithms follows Feistel Structure BLOCK SIZE - 64 bits Plain Text No. of Rounds - 16 Rounds Key Size - 64 bits Sub Key Size - 48 bits No. of Sub Keys - 16 Sub Keys Cipher Text - 64 bits
Views: 157006 Sundeep Saradhi Kanthety
Elliptic Curve Cryptography Overview
 
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John Wagnon discusses the basics and benefits of Elliptic Curve Cryptography (ECC) in this episode of Lightboard Lessons. Check out this article on DevCentral that explains ECC encryption in more detail: https://devcentral.f5.com/articles/real-cryptography-has-curves-making-the-case-for-ecc-20832
Views: 169092 F5 DevCentral
Cryptography 101 - Substitution Ciphers
 
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In this video we look at substitution ciphers: how they are made and how to break them.
Views: 62248 Pico Cetef
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: 17718 Mobilefish.com
Playfair Cipher Explained
 
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An animated attempt of explaining the Playfair cipher. This tutorial includes rules of the cipher followed by an example to clear things up. This was a part of my final year project to create a learning aid. I decided to upload this so the animation won't go to waste. All feedbacks welcome. Special thanks to Olivia Beck for creating the background image
Views: 179480 Kenny Luminko
Cryptography: Secret Key Encryption
 
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https://asecuritysite.com/cryptobook/crypto02
Views: 1990 Bill Buchanan OBE
Double Ratchet Messaging Encryption - Computerphile
 
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How does instant messaging encryption protect against attack? Dr Mike Pound on the double ratchet. Diffie Hellman Key Exchange Explained: https://youtu.be/NmM9HA2MQGI Signal Protocol: https://youtu.be/DXv1boalsDI Endianness Explained with an Egg: https://youtu.be/NcaiHcBvDR4 https://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 76299 Computerphile
RSA Algorithm with Example | Asymmetric Key Cryptography (Public Key Cryptography)
 
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In this network security video tutorial we will study the working of RSA Algorithm. RSA Algorithm theory - 1. Ron Rivest, Adi Shamir and Len Adlemen developed the method called as RSA algorithm. 2. Most popular and proven asymmetric key cryptography algorithm 3. Based on the mathematical fact that it is easy to find and multiply large prime numbers together, but it is extremely difficult to factor their product. RSA Algorithm Steps - 1. Choose two large prime numbers P and Q. 2. Calculate N = P * Q 3. Select the public key (i.e. the encryption key) E such that it is not a factor of [(P – 1) * (Q – 1)]. 4. Select the private key (i.e. the decryption key) D such that the following equation is true: (D * E) mod (P – 1) * (Q – 1) = 1 5. For encryption calculate the cipher text CT from the plain text PT as follows: CT= PT^E mod N 6. Send CT as the cipher text to the receiver 7. For decryption calculate the plain text PT from the cipher text CT as follows: PT = CT^D mod N Complete Network Security / Information Security Playlist - https://www.youtube.com/watch?v=IkfggBVUJxY&list=PLIY8eNdw5tW_7-QrsY_n9nC0Xfhs1tLEK Download my FREE Network Security Android App - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials Simple Snippets Official Website - http://simplesnippets.tech/ Simple Snippets on Facebook - https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram - https://www.instagram.com/simplesnippets/ Simple Snippets on Twitter - https://twitter.com/simplesnippet Simple Snippets Google Plus Page - https://plus.google.com/+SimpleSnippets Simple Snippets email ID - [email protected] For More Technology News, Latest Updates and Blog articles visit our Official Website - http://simplesnippets.tech/ #RSA #RSAalgorithm #NetworkSecurity #AsymmetricCryptography
Views: 1263 Simple Snippets
Chapter 3, part 2: Symmetric Key Crypto --- stream ciphers, RC4
 
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Information Security: Principles and Practice, 2nd edition, by Mark Stamp Chapter 3: Symmetric Key Crypto Section 3.2.2 stream ciphers, RC4 Class Lecture, 2011
Views: 31060 Mark Stamp
Lecture 10: Multiple Encryption and Brute-Force Attacks by Christof Paar
 
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For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com
Double Slit Experiment explained! by Jim Al-Khalili
 
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"If you can explain this using common sense and logic, do let me know, because there is a Nobel Prize for you.." Professor Jim Al-Khalili explains the experiment that reveals the "central mystery of quantum mechanics" - the double slit experiment. Watch the full lecture here: http://www.youtube.com/watch?v=wwgQVZju1ZM Sometimes called the "two-slit" or "Young's" experiment, it demonstrates that matter and energy can display the characteristics of both waves and particles, establishing the principle known as wave-particle duality. Furthermore, it questions the role of the observer in the outcome of events and demonstrates the fundamental limitation of an observer to predict experimental results. For this reason, Richard Feynman called it "a phenomenon which is impossible ... to explain in any classical way, and which has in it the heart of quantum mechanics. In reality, it contains the only mystery [of quantum mechanics]," (see more at http://en.wikipedia.org/wiki/Double-slit_experiment). The Ri is on Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and Tumblr: http://ri-science.tumblr.com/ Our editorial policy: http://www.rigb.org/home/editorial-policy Subscribe for the latest science videos: http://bit.ly/RiNewsletter
Views: 1533664 The Royal Institution
Will Quantum Computers break encryption?
 
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How do you secure messages over the internet? How do quantum computers break it? How do you fix it? Why don't you watch the video to find out? Why does this description have so many questions? Why are you still reading? What is the meaning of life? Facebook: https://www.facebook.com/frameofessence Twitter: https://twitter.com/frameofessence YouTube: https://www.youtube.com/user/frameofessence CLARIFICATIONS: You don't actually need a quantum computer to do quantum-safe encryption. As briefly mentioned at 7:04 , there are encryption schemes that can be run on regular computers that can't be broken by quantum computers. CORRECTIONS: [2:18] Technically, you can use any key to encrypt or decrypt whatever you want. But there's a specific way to use them that's useful, which is what's shown in the video. [5:36] In RSA, depending on exactly what you mean by "private key", neither key is actually derivable from the other. When they are created, they are generated together from a common base (not just the public key from the private key). But typically, the file that stores the "private key" actually contains a bit more information than just the private key. For example, in PKCS #1 RSA private key format ( https://tools.ietf.org/html/rfc3447#appendix-A.1.2 ), the file technically contains the entire public key too. So in short, you technically can't get the public key from the private key or vice versa, but the file that contains the private key can hold more than just the private key alone, making it possible to retrieve the public key from it. Video links: Encryption and HUGE numbers - Numberphile https://youtu.be/M7kEpw1tn50 The No Cloning Theorem - minutephysics https://youtu.be/owPC60Ue0BE Quantum Entanglement & Spooky Action at a Distance - Veritasium https://youtu.be/ZuvK-od647c Sources: Quantum Computing for Computer Scientists http://books.google.ca/books/about/Quantum_Computing_for_Computer_Scientist.html?id=eTT0FsHA5DAC Random person talking about Quantum MITM attacks http://crypto.stackexchange.com/questions/2719/is-quantum-key-distribution-safe-against-mitm-attacks-too The Ekert Protocol (i.e. E91) http://www.ux1.eiu.edu/~nilic/Nina's-article.pdf Annealing vs. Universal Quantum Computers https://medium.com/quantum-bits/what-s-the-difference-between-quantum-annealing-and-universal-gate-quantum-computers-c5e5099175a1 Images, Documents, and Screenshots: Post-Quantum Cryptography initiatives http://csrc.nist.gov/groups/ST/post-quantum-crypto/cfp-announce-dec2016.html http://pqcrypto.eu.org/docs/initial-recommendations.pdf Internet map (Carna Botnet) http://census2012.sourceforge.net/ Quantum network maps https://www.slideshare.net/ADVAOpticalNetworking/how-to-quantumsecure-optical-networks http://www.secoqc.net/html/press/pressmedia.html IBM Quantum http://research.ibm.com/ibm-q/ Music: YouTube audio library: Blue Skies Incompetech: Jay Jay Pamgaea The House of Leaves Premium Beat: Cutting Edge Technology Second Time Around Swoosh 1 sound effect came from here: http://soundbible.com/682-Swoosh-1.html ...and is under this license: https://creativecommons.org/licenses/sampling+/1.0/
Views: 666538 Frame of Essence
How SSL works tutorial - with HTTPS example
 
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How SSL works by leadingcoder. This is a full tutorial how to setup SSL that requires client certificate for reference: http://www.windowsecurity.com/articles/Client-Certificate-Authentication-IIS6.html .
Views: 1410659 tubewar
Transposition Ciphers - Encryption/Decryption
 
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A beginner's guide to Transposition Ciphers (Encryption/Decryption).
Views: 83008 Daniel Rees
Quantum Cryptography Explained
 
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This episode is brought to you by Squarespace: http://www.squarespace.com/physicsgirl With recent high-profile security decryption cases, encryption is more important than ever. Much of your browser usage and your smartphone data is encrypted. But what does that process actually entail? And when computers get smarter and faster due to advances in quantum physics, how will encryption keep up? http://physicsgirl.org/ ‪http://twitter.com/thephysicsgirl ‪http://facebook.com/thephysicsgirl ‪http://instagram.com/thephysicsgirl http://physicsgirl.org/ Help us translate our videos! http://www.youtube.com/timedtext_cs_panel?c=UC7DdEm33SyaTDtWYGO2CwdA&tab=2 Creator/Editor: Dianna Cowern Writer: Sophia Chen Animator: Kyle Norby Special thanks to Nathan Lysne Source: http://gva.noekeon.org/QCandSKD/QCand... http://physicsworld.com/cws/article/n... https://epic.org/crypto/export_contro... http://fas.org/irp/offdocs/eo_crypt_9... Music: APM and YouTube
Views: 272435 Physics Girl
Chapter 3, part 1: Symmetric Key Crypto --- stream ciphers, A5/1, shift registers
 
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Information Security: Principles and Practice, 2nd edition, by Mark Stamp Chapter 3: Symmetric Key Crypto Sections 3.1-3.2.1 stream ciphers, A5/1, shift registers Class Lecture, 2011
Views: 27905 Mark Stamp
21. Cryptography: Hash Functions
 
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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 covers the basics of cryptography, including desirable properties of cryptographic functions, and their applications to security. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 72501 MIT OpenCourseWare
Public Key Crypto and Digital Signatures (ITS335, Lecture 6, 2013)
 
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Public key cryptography and digital signatures. Lecture 6 of ITS335 IT Security at Sirindhorn International Institute of Technology, Thammasat University. Given on 28 November 2013 at Bangkadi, Pathumthani, Thailand by Steven Gordon. Course material via: http://sandilands.info/sgordon/teaching
Views: 1963 Steven Gordon
Cryptography: Transposition Cipher
 
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This lesson explains how to encrypt and decrypt a message using a transposition cipher. Site: http://mathispower4u.com
Views: 62432 Mathispower4u
The Internet: Encryption & Public Keys
 
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Mia Epner, who works on security for a US national intelligence agency, explains how cryptography allows for the secure transfer of data online. This educational video explains 256 bit encryption, public and private keys, SSL & TLS and HTTPS. Learn more at http://code.org/ Help us translate into your language: http://code.org/translate/videos Stay in touch with us! • on Twitter https://twitter.com/codeorg • on Facebook https://www.facebook.com/Code.org • on Instagram https://instagram.com/codeorg • on Tumblr https://blog.code.org • on LinkedIn https://www.linkedin.com/company/code... • on Google+ https://google.com/+codeorg Help us caption & translate this video! https://amara.org/v/HGaS/
Views: 224335 Code.org
Instant Messaging and the Signal Protocol - Computerphile
 
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How do instant message apps do end to end encryption when one phone may not even be switched on yet? Dr Mike Pound on the Signal protocol at the core of most messaging apps. Double Ratchet: COMING SOON! https://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 132910 Computerphile
Asymmetric Key Encryption
 
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Explanation of how asymmetric key encryption works. Part of a secure engineering web app found here: http://www.ibm.biz/ek-ibmz Music by www.bensound.com IBM Contact: Bryan Childs
Views: 397 IBM Developer
Chapter 2, part 3: Crypto Basics --- double transposition, one-time pad
 
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Information Security: Principles and Practice, 2nd edition, by Mark Stamp Chapter 2: Crypto Basics Sections 2.3.4-2.3.5 double transposition, one-time pad Class Lecture, 2011
Views: 20412 Mark Stamp
Symmetric Key Distrubition with Public Key Crypto (CSS441, L20, Y15)
 
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Tradeoffs of centralised and decentralised key distribution. Performance of public vs symmetric key crypto in OpenSSL. Course material via: http://sandilands.info/sgordon/teaching
Views: 1122 Steven Gordon
The Mathematics of Diffie-Hellman Key Exchange | Infinite Series
 
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Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/donateinfi Symmetric keys are essential to encrypting messages. How can two people share the same key without someone else getting a hold of it? Upfront asymmetric encryption is one way, but another is Diffie-Hellman key exchange. This is part 3 in our Cryptography 101 series. Check out the playlist here for parts 1 & 2: https://www.youtube.com/watch?v=NOs34_-eREk&list=PLa6IE8XPP_gmVt-Q4ldHi56mYsBuOg2Qw Tweet at us! @pbsinfinite Facebook: facebook.com/pbsinfinite series Email us! pbsinfiniteseries [at] gmail [dot] com Previous Episode Topology vs. “a” Topology https://www.youtube.com/watch?v=tdOaMOcxY7U&t=13s Symmetric single-key encryption schemes have become the workhorses of secure communication for a good reason. They’re fast and practically bulletproof… once two parties like Alice and Bob have a single shared key in hand. And that’s the challenge -- they can’t use symmetric key encryption to share the original symmetric key, so how do they get started? Written and Hosted by Gabe Perez-Giz Produced by Rusty Ward Graphics by Ray Lux Assistant Editing and Sound Design by Mike Petrow and Meah Denee Barrington Made by Kornhaber Brown (www.kornhaberbrown.com) Thanks to Matthew O'Connor, Yana Chernobilsky, and John Hoffman who are supporting us on Patreon at the Identity level! And thanks to Nicholas Rose, Jason Hise, Thomas Scheer, Marting Sergio H. Faester, CSS, and Mauricio Pacheco who are supporting us at the Lemma level!
Views: 51336 PBS Infinite Series
DES -- The Algorithm
 
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DES -- Data Encryption Standard -- has been the workhorse of modern cryptography for many decades. It has never been compromised mathematically (not in the open literature, at least), yet, its design notes were never made public either. Many who use it are unaware of how it works. Here we open the DES box and find inside a repetition of sub-boxes in which very simple primitives are at work: substitution, transposition, split, concatenation, and bit-wise operation. DES inside teaches us that complexity is comprised of a lot of simplicity.
Views: 143439 Gideon Samid
Gambling with Secrets: Part 4/8 (Private Key Cryptography)
 
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Private key Cryptography is explored from the Caesar Cipher to the one-time pad. We introduce encryption, decryption, ciphers, cryptanalysis and what it means to design a strong cipher. Finally perfect secrecy is explained with the invention of the one-time pad.
Views: 38098 Art of the Problem
Chapter 3, part 6: Symmetric Key Crypto --- block ciphers, AES
 
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Information Security: Principles and Practice, 2nd edition, by Mark Stamp Chapter 3: Symmetric Key Crypto Section 3.3.4 block ciphers, AES Class Lecture, 2011
Views: 7470 Mark Stamp
Bitcoin ETF News Disappoints - Key Crypto Players Double Down
 
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Bitcoin ETF continues to fall on hard times, but the key players have not given up on the dream. Sources https://www.ccn.com/cboe-chairman-lack-of-a-bitcoin-exchange-traded-note-keeps-wall-street-away-from-crypto-investing/ https://www.ccn.com/cboe-chairman-lack-of-a-bitcoin-exchange-traded-note-keeps-wall-street-away-from-crypto-investing/ https://www.fxstreet.com/cryptocurrencies/news/gemini-exchange-founders-the-winklevoss-twins-are-not-giving-up-on-bitcoin-etf-201901080554 https://bitcoinist.com/bitwise-another-bitcoin-etf-filing/ SUPPORT ME ON BITBACKER WITH CRYPTO https://bitbacker.io/user/cryptolark/ RECOMMENDED EXCHANGES ABRA - GET $25 IN BTC - https://invite.abra.com/p9lwV0WqCR BINANCE https://www.binance.com/en?ref=10192350 BINANCE JE - BUY CRYPTO WITH POUNDS & EUROS https://www.binance.je/?ref=35019746 COINBASE - GET $10 Free Bitcoin for signing up! https://www.coinbase.com/join/597e56a59d75c600b3a86461 KUCOIN https://www.kucoin.com/#/?r=18a8f CRYPTOCURRENCY HARDWARE WALLETS LEDGER NANO S https://www.ledger.com/?r=6877 TREZOR https://shop.trezor.io/?a=Aw902Rsted CERTIFIED CRYPTOCURRENCY BROKERAGE Caleb & Brown https://partners.calebandbrown.com/cryptolark SOCIAL MEDIA - These are my only accounts, beware of scammers! TWITTER twitter.com/TheCryptoLark FACEBOOK facebook.com/TheCryptoLark TELEGRAM GROUP t.me/thecryptolark TELEGRAM HANDLE @cryptolark STEEMIT steemit.com/@larksongbird D-TUBE d.tube/#!/c/larksongbird PODCAST - find me on I-tunes "Crypto Waves" https://player.fm/series/crypto-waves-the-crypto-lark-podcast CONTACT E-mail [email protected] with business or event enquiries. DISCLAIMER Everything expressed here is my opinion and not official investment advice - please do your own research before risking your own money. This video may contain copyrighted material the use of which is not always specifically authorized by the copyright owner. Such material is made available for research or academic purposes. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, this video is distributed without profit, for research and educational purposes. Custom intro and tunes created by The Maker's Initiative - Auckland, NZ Thanks for watching; please like, subscribe, and share if you found this useful! #bitcoin #ethereum #cryptocurrency #neo #elastos #litecoin #eos #ripple #ontology #monero #stellarlumenes #cardano #nem #dash #ethereumclassic #vechain #tezos #zcash #dogecoin
Views: 4706 The Crypto Lark
The one-time pad | Journey into cryptography | Computer Science | Khan Academy
 
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The perfect cipher Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/frequency-stability?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/polyalphabetic-cipher?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: 422079 Khan Academy
Get DLC GUNS Faster! BO3 Double Crypto Key WEEK!
 
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In this video I let all of you know that currently there's a double crypto key week in Uplink going on at the moment. I also give tips on how to successfully play Uplink to have a better chance to win and get more keys. Be sure to save your keys and have fun grinding Black Ops 3 if you do so! This double crypto key event ends on August 18th, so you have plenty of time to rack up keys! Thank you for watching this video, I appreciate the support! ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ ► My Headset: Turtle Beach PX4 ► My Kontrol Freeks: Specter Kontrol Freeks ► My Controller: Scuf 4PS ► My System: Sony Playstation 4 ► My YouTube Channel Only One: https://www.youtube.com/user/CoDGhosts619 ► My Gaming Chair: DX Racer F Series ►Background Song: Real Chill Old School Hip Hop Instrumentals Rap Beat 'FREEDOM' Link To Song: https://www.youtube.com/watch?v=3i6uIfZafUo Instrumental produced by Chuki: http://www.youtube.com/user/CHUKImusic ► My Twitter: https://twitter.com/CoDGhosts619 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ ► A Little About My Channel: Over here on my channel I upload primarily Call of Duty because that is the game i love and play the most. I try my best to upload daily and every week because I want to grow my channel and not let any of my subscribers down. I try to put out a new Top 5 out every week because I love making them and lots of you guys seem to enjoy them! I also upload live commentaries and try to get awesome gameplays for you all! I hope your stay on my channel will be GREAT! ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
Views: 3714 Ghosts619
Difference Between Asymmetric Key And Symmetric Key Cryptography || Network Secruity
 
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#cryptograpgy#symmetrickey#asymmetric#network
Views: 185 Study Fever
The Enigma Machine Explained
 
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As technology increases, so do the methods of encryption and decryption we have at our disposal. World War II saw wide use of various codes from substitution ciphers to employing Navajo code talkers in the Pacific theater. Here, science journalist and author Simon Singh demonstrates the German enigma machine, a typewriter-like device used to encrypt communications. He demonstrates not only its operation, but both the strength and fatal flaws in its method. Watch the Full Program Here: https://youtu.be/nVVF8dgKC38 Original Program Date: June 4, 2011 The World Science Festival gathers great minds in science and the arts to produce live and digital content that allows a broad general audience to engage with scientific discoveries. Our mission is to cultivate a general public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future. Subscribe to our YouTube Channel for all the latest from WSF. Visit our Website: http://www.worldsciencefestival.com/ Like us on Facebook: https://www.facebook.com/worldsciencefestival Follow us on twitter: https://twitter.com/WorldSciFest
Views: 490156 World Science Festival
Black Ops 3 Multiplayer Gameplay & DOUBLE CRYPTO KEY WEEKEND!
 
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Donate: https://www.twitchalerts.com/donate/kross How I Record & Stream - http://e.lga.to/Kross Save $ on Games! - https://www.g2a.com/r/kross Click to Subscribe http://bit.ly/12cNy1C Follow me! https://twitter.com/Kross https://facebook.com/Kross https://instagram.com/danielkrossyt Click to Subscribe http://bit.ly/12cNy1C ▼ You can find T-shirts, Hoodies and more at http://Kross-Store.com
Views: 7582 Daniel Kross
IEOs - The Next Major Price Catalyst for the Crypto & Bitcoin Markets & Necessary ICO Evolution
 
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What are IEOs? Why are they an important evolution in crowd funding? Will they lead to the next crypto & Bitcoin bull run? RECOMMENDED EXCHANGES & WALLETS GET FREE CRYPTO ABRA - GET $25 IN BTC - (US bank deposits or AMEX)- https://invite.abra.com/p9lwV0WqCR COINBASE - GET $10 Free Bitcoin on sign up! https://bit.ly/2zqeVfV LIQUID - GET $10 FREE QASH (verify & make $100 trade) - https://www.liquid.com?affiliate=Gtrf6wJG586147 TOP EXCHANGES BINANCE - #1 Crypto Exchange https://www.binance.com/?ref=10192350 NASH - https://nash.io/referrals?code=2JWpfo BINANCE JE - BUY CRYPTO IN POUNDS & EURO https://www.binance.je/?ref=35019746 KUCOIN - Awesome For Low Cap Gems - https://www.kucoin.com/#/?r=18a8f CERTIFIED CRYPTOCURRENCY BROKERAGE CALEB & BROWN - Brokerage - Trade OTC like the big guys https://bit.ly/2Feq8F6 TAKE YOUR SECURITY SERIOUSLY - GET A HARDWARE WALLET LEDGER NANO https://www.ledgerwallet.com/r/6877 TREZOR - https://shop.trezor.io?a=Aw902Rsted LEARN TO TRADE LIKE THE PROS TRADER COBB 10% OFF CODE THELARK10 - https://tradercobb.com/?ref=169 SOCIAL MEDIA - These are my only accounts, beware of scammers! TWITTER twitter.com/TheCryptoLark FACEBOOK facebook.com/TheCryptoLark TELEGRAM GROUP t.me/thecryptolark TELEGRAM HANDLE @cryptolark STEEMIT steemit.com/@larksongbird D-TUBE d.tube/#!/c/larksongbird BACKGROUND ART BY Josie Bellini - https://josie.io/ PODCAST - find me on I-tunes "Crypto Waves" https://player.fm/series/crypto-waves-the-crypto-lark-podcast CONTACT E-mail [email protected] with business or event enquiries. DISCLAIMER Everything expressed here is my opinion and not official investment advice - please do your own research before risking your own money. This video may contain copyrighted material the use of which is not always specifically authorized by the copyright owner. Such material is made available for research or academic purposes. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, this video is distributed without profit, for research and educational purposes. Thanks for watching; please like, subscribe, and share if you found this useful! #bitcoin # crypto #ethereum #cryptocurrency #neo #elastos #litecoin #eos #ripple #ontology #monero #stellarlumens #cardano #nem #dash #ethereumclassic #vechain #tezos #zcash #dogecoin
Views: 8268 The Crypto Lark
Challenge Question - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 2171 Udacity
Martijn Grooten - Elliptic Curve Cryptography for those who are afraid of maths
 
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Elliptic Curve Cryptography (ECC) is hot. Far better scalable than traditional encryption, more and more data and networks are being protected using ECC. Not many people know the gory details of ECC though, which given its increasing prevalence is a very bad thing. In this presentation I will turn all members of the audience into ECC experts who will be able to implement the relevant algorithms and also audit existing implementations to find weaknesses or backdoors. Actually, I won't. To fully understand ECC to a point where you could use it in practice, you would need to spend years inside university lecture rooms to study number theory, geometry and software engineering. And then you can probably still be fooled by a backdoored implementation. What I will do, however, is explain the basics of ECC. I'll skip over the gory maths (it will help if you can add up, but that's about the extent of it) and explain how this funny thing referred to as "point addition on curves" can be used to exchange a secret code between two entities over a public connection. I will also explain how the infamous backdoor in Dual_EC_DRGB (a random number generator that uses the same kind of maths) worked. At the end of the presentation, you'll still not be able to find such backdoors yourselves and you probably realise you never will. But you will be able to understand articles about ECC a little better. And, hopefully, you will be convinced it is important that we educate more people to become ECC-experts.
Views: 24184 Security BSides London
Introduction to Technical Analysis for Beginners
 
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NEW COURSE: https://chartguys.com/courses/entries-exits/ Introduction to Technical Analysis for Beginners Technical Analysis Basics Technical Analysis for Beginners Introduction to Stock Charts Please Signup for a FREE trial on our website to learn Technical Analysis: We offer multiple hours of live webcam coverage a day, in addition to continuous chat room coverage. Join the community today. Chartguys.com Technical Analysis Facebook Page: https://www.facebook.com/thechartguys... Chartguys.com Technical Analysis FREE facebook community: https://www.facebook.com/groups/thech... Stocktwits: http://stocktwits.com/ChartGuysDan
Views: 523533 TheChartGuys
Authentication and Public Key Cryptography (ITS335, Lecture 5, 2013)
 
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MAC and hash functions for authentication; Introduction to public key cryptography. Lecture 5 of ITS335 IT Security at Sirindhorn International Institute of Technology, Thammasat University. Given on 26 November 2013 at Bangkadi, Pathumthani, Thailand by Steven Gordon. Course material via: http://sandilands.info/sgordon/teaching
Views: 1153 Steven Gordon
Scrypt Password Based Key Derivation Function - Cryptography
 
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A more advanced topic, we go over the Scrypt password based key derivation function which is used in popular cryptocurrencies like Litecoin!
Views: 4657 CSBreakdown
Bitcoin BEAR TRAP?!? Wall St Pours $24 Billion into Crypto OTC!!! Proof of Keys: AFTERMATH 💀🔑
 
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Is #Bitcoin currently in a bear trap?!? Wall Street pours $24 billion into crypto OTC, TydeCoyn is not a scam, Weiss Ratings 2019 crypto predictions, Proof of Keys aftermath, BitTorrent to launch $BTT token, crypto arm wrestling, news, and more! 🔥 30% OFF ALL Ledger Products 👉 http://Ledger.kdub.co 🗳 VOTE for Crypto Zombie 🧟‍♂️ 👉 https://cia.cryptoinfluence.io/#/ 📩 Sign up for The Blockchain Brief Newsletter 👉 http://BlockchainBrief.kdub.co 🧟‍♂️ Join The “Crypto Zombies” Telegram ►► https://t.me/joinchat/E67b8w-hQrMsZebuCC6peg 🔺Get The Brave Browser Here ►► https://brave.com/cry542 🛒 Shop on Amazon with BTC ►► http://Alagoria.kdub.co 0:01 Crypto day trading: https://twitter.com/StockTwits/status/1080496232638939137 0:29 Markets 〽️ 2:44 Bitcoin bear trap? https://www.coindesk.com/4k-ahead-bitcoins-low-volume-price-pullback-could-be-a-bear-trap 4:24 Proof of Keys aftermath: https://www.coinspeaker.com/proof-of-keys-exchanges/ 6:30 Crypto arm wrestling: https://www.reddit.com/r/CryptoCurrency/comments/aci6zo/crypto_adoption/ 7:11 Weiss crypto predictions: https://weisscryptocurrencyratings.com/news/crypto-forecasts-2019-beyond-1759 14:56Wall Street pours $24 Billion into crypto: https://dailyhodl.com/2019/01/04/wall-street-pours-24-billion-into-bitcoin-and-crypto-plus-ripple-and-xrp-tron-ethereum-litecoin-stellar-cardano-crypto-news-alert/ 15:35 Circle OTC: https://cointelegraph.com/news/circle-executed-24-billion-in-otc-trades-in-2018 16:11 Official announcement: https://medium.com/circle-blog/circle-2018-accomplishments-and-2019-themes-a58706d4d33e 16:22 Some perspective… https://twitter.com/Rhythmtrader/status/1080898959822995457 16:46 TydeCoyn: http://www.tydecoyn.ca/ 18:13 Bitcoin SV (BSV) logo knockoff: https://www.ccn.com/bitcoin-svs-new-logo-looks-suspiciously-like-the-original-btcs/ 19:16 Coinbase users angry over BSV: https://www.ccn.com/coinbase-has-still-not-issued-bitcoin-sv-to-customers/ 21:05 BitTorrent Launches BTT: https://cointelegraph.com/news/bittorrent-launches-native-tron-based-token 22:16 NKN token swap: https://medium.com/nknetwork/nkn-token-swap-nep-5-to-erc-20-c476d064718e 22:38 Cardano (ADA) commits: https://coincodecap.com/ 23:10 Overstock to pay taxes in BTC: https://www.cryptoglobe.com/latest/2019/01/overstock-to-pay-a-portion-of-its-taxes-using-bitcoin-in-ohio/ 24:01 Man buys car with Ethereum: http://www.asiaone.com/singapore/man-pays-half-84000-car-cryptocurrency-ethereum 25:10 👉 Ledger Nano Giveaway: https://coincodex.tv/contest 🔥 30% OFF ALL Ledger Products 👉 http://Ledger.kdub.co 🗳 VOTE for Crypto Zombie 🧟‍♂️ 👉 https://cia.cryptoinfluence.io/#/ 📩 Sign up for The Blockchain Brief Newsletter 👉 http://BlockchainBrief.kdub.co Buy Bitcoin on Coinbase ►► http://Coinbase.kdub.co Ledger Nano S Wallet ►► http://Ledger.kdub.co Buy Cryptos on Binance ►► http://Binance.kdub.co Buy Cryptos on Huobi ►► http://Huobi.kdub.co Buy Cryptos on Bibox ►► http://Bibox.kdub.co Buy Cryptos on KuCoin ►► http://KuCoin.kdub.co Follow me on Twitter ►► http://twitter.com/TheCryptoZombie Join The Telegram ►► https://t.me/joinchat/E67b8w-hQrMsZebuCC6peg DISCLAIMER: I am not a financial advisor. This is not financial advice. This is just my opinion. Always do your own research before investing. I am not responsible for your trades… Is NOW a Good Time to Buy Ethereum?!? BULLISH Bitcoin Indicator: Bottom on BTC’s Birthday?!? https://youtu.be/51VCEfNdYiE Watch this video again because it's awesome: https://youtu.be/yX5j2EBGEAI #cryptocurrency #blockchain #cryptozombie #crypto #btc #bitcoincash #bch #bsv #ethereum #eth #ripple #xrp #neo #nkn #tron #trx #bittorrent #btt $BTC $ETH $XRP $BSV $BCH $NEO $NKN $ADA $BTT
Views: 19411 Crypto Zombie
Differences Between Encryption, Encoding and Hashing
 
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Differences Between Encryption, Encoding and Hashing
Views: 6931 LearnEveryone
SEC Fintech Forum in May - Canada Crypto Regulation - itBit Bitcoin & ETH Rebates - Stellar Mozilla
 
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Get the Ledger Nano X to Safely store your Crypto - https://www.ledgerwallet.com/r/acd6 Help support the channel by joining my Patreon group - https://www.patreon.com/thinkingcrypto Sign up with Coinbase for Free and get $10 free Bitcoin when you spend $100! - https://www.coinbase.com/join/59db057bed984302ff3b1275 Easily purchase Altcoins such as XRP, Cardano and more on the Binance exchange - https://www.binance.com/?ref=2157551 Follow on Twitter - https://twitter.com/ThinkingCrypto1 Follow on Facebook - https://www.facebook.com/thinkingcrypto/ Website - http://www.ThinkingCrypto.com/ Follow on Steemit - https://steemit.com/@thinkingcrypto ================================================= Help support the channel! Donations : BTC - 3GPcKwB3UGML4UiYqZM6BYx7Nu5Dj7GKDD ETH - 0x7929e49cabe8d95d31392eaf974f378b508da2f4 LTC - MWMhsyGX7tsTPGS2EtSCAWpy3ywCv25r6B XRP - rDsbeomae4FXwgQTJp9Rs64Qg9vDiTCdBv Destination Tag - 35594196 ================================================= - SEC’s Finhub to Host Public Forum on Blockchain, Digital Assets in May - Canada Proposes Regulatory Framework for Cryptocurrency Exchanges - itBit to bring maker rebates to all BTC and ETH trading - Stellar Foundation Appoints Former Mozilla COO as CEO and Executive Director #Bitcoin #Ethereum #XRP ================================================= Disclaimer - Thinking Crypto and Tony are not financial or investment experts. You should do your own research on each cryptocurrency and make your own conclusions and decisions for investment. Invest at your own risk, only invest what you are willing to lose. This channel and its videos are just for educational purposes and NOT investment or financial advice. Bitcoin, Bitcoin News, Bitcoin ETF, XRP, XRP News, Ripple, Ripple XRP, Ripple News, Ethereum, Ethereum News, Litecoin, Litecoin News, Crypto, Crypto News, Token Taxonomy Act, Bakkt, Erisx, Fidelity Digital Assets, Cryptocurrency, Digital Assets
Views: 3269 Thinking Crypto