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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: 449590 itfreetraining
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: 409685 Computerphile
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: 606496 Art of the Problem
Key Exchange
 
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This clip from the 2008 Royal Institution Christmas Lectures shows a simple demonstration of how two people can agree on a secret key, even though all of their communications are carried out in public. In the electronic world, secret key exchange allows computers to communicate securely, and is used, for example, when you give your credit card information to an on-line shop. You can watch the 2008 Royal Institution Christmas Lectures in full at: http://research.microsoft.com/~cmbishop or by visiting the Royal Institution web site. There is a dedicated web site to accompany the 2008 Christmas Lectures, with ten interactive games as well as downloadable PDF instructions for experiments which can be conducted at home or at school: http://www.rigb.org/christmaslectures08
Views: 138633 ProfChrisBishop
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: 265396 Physics Girl
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: 181278 Computerphile
Elliptic Curves - Computerphile
 
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Just what are elliptic curves and why use a graph shape in cryptography? Dr Mike Pound explains. Mike's myriad Diffie-Hellman videos: https://www.youtube.com/playlist?list=PLzH6n4zXuckpoaxDKOOV26yhgoY2S-xYg 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: 151878 Computerphile
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: 56777 Mathispower4u
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: 37703 Art of the Problem
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: 114983 Sundeep Saradhi Kanthety
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: 19484 Mark Stamp
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: 139764 Gideon Samid
Transposition Ciphers - Encryption/Decryption
 
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A beginner's guide to Transposition Ciphers (Encryption/Decryption).
Views: 74710 Daniel Rees
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: 26524 Mark Stamp
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: 58941 Computerphile
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: 442903 Art of the Problem
DES (Data encryption standard ) key Generation in Hindi |Cryptography and Network Security Lectures
 
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Take the Full Course of Cryptography and Network Security What we Provide 1) 20 Videos (Index is given down) + More Update will be Coming Before final exams 2)Hand made Notes with problems for your to practice 3)Strategy to Score Good Marks in Cryptography and Network Scurity To buy the course click https://goo.gl/mpbaK3 if you have any query email us at [email protected] Sample Notes : https://goo.gl/Ze1FpX or Fill the form we will contact you https://goo.gl/forms/2SO5NAhqFnjOiWvi2 Cryptography and System Security Index Lecture 1 Introduction to Cryptography and Security System Lecture 2 Security Goals and Mechanism Lecture 3 Symmetric Cipher Lecture 4 Substitution Cipher Lecture 5 Transposition Cipher Lecture 6 Stream and Block Cipher Lecture 7 Mono Alphabetic Cipher Lecture 8 Poly Alphabetic Cipher Lecture 9 Diffie Hellman Lecture 10 RSA Algorithm with Solved Example Lecture 11 IDEA Algorithm Full Working Lecture 12 SHA-1 Algorithm Full Working Lecture 13 Blowfish Algorithm Full working Lecture 14 DES Algorithm Full Working Lecture 15 Confusion and Diffusion Lecture 16 AES Algorithm Full working Lecture 17 Kerberos Lecture 18 Malicious Software ( Virus and worms ) Lecture 19 DOS and DDOS Attack Lecture 20 Digital Signature Full working Explained
Views: 16071 Last moment tuitions
Symmetric Key in Cryptography
 
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Imp for UGC NET and GATE
Views: 2849 Gate Smashers
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: 201407 Code.org
Difference Between Asymmetric Key And Symmetric Key Cryptography || Network Secruity
 
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#cryptograpgy#symmetrickey#asymmetric#network
Views: 121 Study Fever
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: 866201 3Blue1Brown
How Encryption Keys Work - with Chris Bishop
 
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What does the padlock icon on your internet browser mean and why is encryption important? In this clip from 2008 CHRISTMAS LECTURES "Hi-tech trek", Chris Bishop uses coloured water to demonstrate how information is transferred on the internet. Subscribe for regular science videos: http://bit.ly/RiSubscRibe This video is from our 2017 advent calendar. Watch the full series here: https://www.youtube.com/playlist?list=PLbnrZHfNEDZyvS5Cx-aRTX-Y8IBJCNmYm Or watch the full lecture here: http://www.rigb.org/christmas-lectures/watch/2008/hi-tech-trek/untangling-the-web?utm_source=youtube&utm_medium=social&utm_campaign=2017_advent&utm_content=description The Royal Institution 2017 advent calendar ‘Transmissions Through Time’ looks through the lens of CHRISTMAS LECTURES past to share the best demonstrations around the science of communication. From Attenborough and Sagan to Woollard and Fong, we revisit old favourites and find new gems to bring you a little gift of science every day in the lead up to Christmas. http://bit.ly/RiAdvent17 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: 14100 The Royal Institution
Public Key Cryptography - 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: 774 Udacity
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
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: 641 Simple Snippets
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: 1359557 tubewar
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: 286 IBM Developer
Classifications of Cryptography
 
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In this video , I explain about the algorithm , symmetric key encryption & asymmetric key encryption, List of symmetric key Algorithms and Asymmetric key Algorithms, and difference between symmetric & asymmetric key encryption and also explain the applications where cryptography is use. 00:40 Algorithm 02:52 Symmetric Key Encryption 10:37 Advantages/Disadvantages of Symmetric key Encryption 13:58 Asymmetric Key Encryption 17:24 Advantages/Disadvantages of Asymmetric key Encryption 22:42 Difference Symmetric V/S Asymmetric Key Encryption 25:04 Applications of Cryptography Subscribe to my channel for more videos like this and to support my efforts. Thanks and Love LIKE | COMMENT | SHARE | SUBSCRIBE ---------------------------------------------------------------------------------- -~-~~-~~~-~~-~- Dear Friends please watch my video lecture and hit like, subscribes and don't forget to share with your friends. -~-~~-~~~-~~-~-
Views: 324 Kavita Jakhar
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: 524385 Frame of Essence
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: 15619 Mobilefish.com
ElGamal Cryptography in Hindi - Key Generation, Encryption, Decryption Step
 
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ElGamal Cryptography in Hindi - Key Generation, Encryption and Decryption Steps with Solved Example Computer Network Security(CNS) Lectures – Internet Security
Symmetric key cryptographic algorithm in bangla || Network security Tutorials in bangla
 
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Symmetric key cryptographic algorithm in bangla is a part of Network security tutorials in bangla by JM Shejan. || Basic cryptography tutorial in bangla || In this video Symmetric key encription algorithm is described clearly. If you have any question you can just comment below. If you like this video please like and share. And of course Don't forget to SUBSCRIBE! Keep Contact on facebook: Page: https://www.facebook.com/dsteaching/ Short Details: Symmetric-key algorithms use the same cryptographic keys for both encryption of plaintext and decryption of cipher text. Symmetric-key encryption can use two types of ciphers. Either stream ciphers or block ciphers.
Views: 701 JM Shejan
The Twofish Encryption Algorithm
 
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Twofish is a block cipher by Counterpane Labs, published in 1998. It was one of the five Advanced Encryption Standard (AES) finalists, and was not selected as AES. Twofish has a 128-bit block size, a key size ranging from 128 to 256 bits, and is optimized for 32-bit CPUs. Currently there is no successful cryptanalysis of Twofish. https://www.schneier.com/academic/twofish/ This animation is designed by Abdullah AlQahtani [email protected]
Views: 9605 Hemaya Group
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: 3624 Ghosts619
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: 47080 PBS Infinite Series
22. Cryptography: Encryption
 
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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 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: 15745 MIT OpenCourseWare
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: 168308 Kenny Luminko
Chapter 3, part 4: Symmetric Key Crypto --- block ciphers, DES
 
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Information Security: Principles and Practice, 2nd edition, by Mark Stamp Chapter 3: Symmetric Key Crypto Section 3.3.2 block ciphers, DES Class Lecture, 2011
Views: 20690 Mark Stamp
Bitcoin Double Bottom! - Will $4,000 Hold? Bitcoin Lightning Network Growing FAST!
 
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Check out the Cryptocurrency Technical Analysis Academy here: https://bit.ly/2NykhOQ - - - If you enjoyed the video, please leave a like, and subscribe! - - - Follow me on Instagram & Twitter: @cryptojebb Join the Discord! https://discord.gg/59jGjJy #Bitcoin #BitcoinToday #BitcoinNews *I am not a financial adviser, this is not financial advice. I strongly encourage all to do their own research before doing anything with their money. All investments/trades/buys/sells etc. should be made at your own risk with your own capital.* Spare Change? BTC 127eLjKTBKU9HTFhYowCDC4D3JBxonVk15 ETH 0x5115ACa82edf204760fE3B351c08a48d6004D89B LTC LSKXx3fQRK5LMowGznVvo6A9NtmtaQaoqP Please do not feel obligated to donate, though donations are appreciated!
Views: 5102 Crypto Jebb
TokenPay l Double Encryption Guide!
 
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This video shows how you can double encrypt your TokenPay wallet.dat file to add another extra layer of security. ---------------------------------------------------------- TokenPay Information Guide 🔒 TPAY WHITEPAPER TokenPay.com/whitepaper.pdf TOKENPAY WEBSITE TokenPay.com EFIN PLATFORM & WHITEPAPER efin.com INFINITESIMAL WHITEPAPER infinitesimal.com ECOSYSTEM REPORTS & ARTICLES medium.com/TokenPay TOKENSUISSE SWISS AM TokenSuisse.com TOKEN GAMING TokenGaming.com VIDEO GUIDES & LIVESTREAMS Youtube.com/TokenPay REDDIT: Reddit.com/r/tpay/ FACEBOOK COMMUNITY facebook.com/groups/TokenPayCommunity/ DISCORD: discordapp.com/invite/UxVtzZr FOLLOW US ON TWITTER twitter.com/TokenPay twitter.com/DerekCapo twitter.com/TokenSuisse twitter.com/efinexchange
Views: 475 TokenPay
RaZe Bdaash:  *NEW* DEMOLITION PLAYLIST | DOUBLE XP & CRYPTO KEYS
 
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We just out here grinding man!! A dream will only remain a dream if there's no action involved! #LevelUp
Views: 168 RaZe Bdaash
HoneyMiner - A New Crypto Mining Applications Aimed at Beginners
 
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HoneyMiner is a new user-friendly mining application that is aimed towards beginner cryptocurrency miners. Enabling the mining application is as easy as downloading the app and clicking "On". In this video I give you my thoughts on the app and where I think they can improve. HoneyMiner - http://www.kevinmuldoon.com/go/honeyminer * The above link includes a referral link. I would rather they removed this referral system and passed all profits on to miners, however the company asked me to use a referral link :) Also Referenced in the Video: What to Mine - https://whattomine.com NiceHash - NiceHash Fees - https://www.nicehash.com/help/fees You should also check out their October update at https://medium.com/honeyminer/new-from-honeyminer-remote-monitoring-profitability-increases-d5d5243eb3d8 Be sure to leave a comment below and give your opinion on this topic. Also, if you haven't already subscribed, please click the subscribe button so you stay up to date with my latest cryptocurrency videos. Kevin OBVIOUS DISCLAIMER IS OBVIOUS: I am not a financial advisor. My opinions are my own and it is the responsibility of everyone to do their own research for every coin they invest in. SafeCoin ------------- In June 2018 I joined the SafeCoin project https://safecoin.org/ Find out why at https://www.youtube.com/watch?v=Qt6Hu356Kbo Buy Cryptocurrency -------------------------------- Exchange USD, GBP, EUR, and more, to Bitcoin and other popular Cryptocurrencies. CoinBase - https://www.kevinmuldoon.com/go/coinbase Cryptocurrency Wallets -------------------------------------- Protect your cryptocurrency with hardware wallets. Ledger Nano S Amazon USA - https://amzn.to/2HHzxlm Amazon UK - https://amzn.to/2HY8tTj Trezor Amazon USA - https://amzn.to/2raFJMu Amazon UK - https://amzn.to/2FXs9k6 KeepKey Amazon USA - https://amzn.to/2JFWzto Amazon UK - https://amzn.to/2K0Amqs Buy HashPower --------------------------- Don't have a mining rig? Don't worry, you can purchase hashpower from others and use their equipment to mine the coins you want. NiceHash - https://www.kevinmuldoon.com/go/nicehash Mining Rig Rentals - https://www.kevinmuldoon.com/go/miningrigrentals Crypto Exchanges ------------------------------------------------- A Selection of exchanges I have used and trust. SafeTrade - https://safe.trade/ (Beta) Binance - https://www.kevinmuldoon.com/go/binance LiveCoin - https://www.kevinmuldoon.com/go/livecoin HitBTC - https://www.kevinmuldoon.com/go/hitbtc Kukoin - https://www.kevinmuldoon.com/go/kucoin Nanex - https://nanex.co/ --- Connect With Me --- Website: https://www.kevinmuldoon.com Twitter: https://twitter.com/KevinMuldoon Facebook: https://www.facebook.com/kevinmuldoondotcom Google+: https://plus.google.com/+KevinMuldoon/
Math Behind Bitcoin and Elliptic Curve Cryptography (Explained Simply)
 
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Elliptic curve cryptography is the backbone behind bitcoin technology and other crypto currencies, especially when it comes to to protecting your digital assets. So in todays video we will look at the math behind elliptic curve cryptography and how it protects your private key. ================================================= 💰Patreon: https://www.patreon.com/Aimstone 🚀Let’s connect on Steemit: https://steemit.com/@astakhiv92 =================================================== 💰Get a Coinbase Wallet! - https://www.coinbase.com/join/5a4bf25... Sign up! 💰Get a Binance Wallet! - https://www.binance.com/?ref=21867060 Sign up! =================================================== ★ Any donation is highly appreciated. 🔑 BTC Wallet Address: 16EtKHG2rwH2NqA4MniK4JRhzPyv5AeiER 🔑 ETH Wallet Address: 0x1db0fa9a379e46cb205a39a0766e30d3e3d0d11e 🔑 LTC Wallet Address: LRcmBavhskBURqmw1sujV5LS8WUPvfaNj8 =================================================== ➤ Bitcoin’s Mass Adoption: https://www.youtube.com/watch?v=_moYqnznICg ➤ LTC Price Prediction: https://www.youtube.com/watch?v=hd8WPRO1Pbk ➤ Bitcoin ETF: https://www.youtube.com/watch?v=NW-ImVwZTZI ==================================================== Thank you so much for watching! ====================================================
Views: 4198 Aimstone
Deanonymizing Double Spenders - 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: 342 Udacity
Chapter 3, part 8: Symmetric Key Crypto --- block cipher modes, ECB mode
 
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Information Security: Principles and Practice, 2nd edition, by Mark Stamp Chapter 3: Symmetric Key Crypto Section 3.3.7 block cipher modes, ECB mode Class Lecture, 2011
Views: 8386 Mark Stamp
Chapter 3, part 5: Symmetric Key Crypto --- block ciphers, DES, triple DES
 
12:44
Information Security: Principles and Practice, 2nd edition, by Mark Stamp Chapter 3: Symmetric Key Crypto Sections 3.3.2-3.3.3 block ciphers, DES, triple DES Class Lecture, 2011
Views: 12729 Mark Stamp
#1 Terms of Cryptography | Network Security | Lecture 4 in Urdu/Hindi
 
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What is the term of cryptography? what is plain text? what is cipher? what is cipher text? what is key? Network Security Special Lecture.
Views: 57 Focus Group
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: 58000 Pico Cetef
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: 29298 Mark Stamp

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