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What is a substitution cipher?
 
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A simple and easy-to-understand version of symmetric encryption is what is known as a substitution cipher. The key for a substitution cipher is a table that maps every possible character in the plaintext message to a different value. To encrypt a message, the sender replaces all characters in the plaintext with their value in the lookup table. To decrypt a message, the recipient reverses the process. Unfortunately, simple substitution ciphers are extremely insecure and subject to a variety of simple attacks. Credits: Talking: Geoffrey Challen (Assistant Professor, Computer Science and Engineering, University at Buffalo). Producing: Greg Bunyea (Undergraduate, Computer Science and Engineering, University at Buffalo). Part of the https://www.internet-class.org online internet course. A blue Systems Research Group (https://blue.cse.buffalo.edu) production.
Views: 1750 internet-class
Caesar Cipher
 
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This tutorial will teach you how to encrypt and decrypt messages using the Caesar Cipher.-- Created using PowToon -- Free sign up at http://www.powtoon.com/ . Make your own animated videos and animated presentations for free. PowToon is a free tool that allows you to develop cool animated clips and animated presentations for your website, office meeting, sales pitch, nonprofit fundraiser, product launch, video resume, or anything else you could use an animated explainer video. PowToon's animation templates help you create animated presentations and animated explainer videos from scratch. Anyone can produce awesome animations quickly with PowToon, without the cost or hassle other professional animation services require.
Views: 128734 Lacey Wright
Cryptanalysis of Classical Ciphers
 
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Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
Views: 12723 nptelhrd
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: 417471 Khan Academy
Cryptography Lecture-2 Data Encryption Transposition Cipher - CBSE NET
 
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Data encryption is the process of converting plain text into chiper text or encrypted data. There are different methods used for Encryption. 1. Substitutions Cipher - monoalphabtic - Polyalphabatic 2. Shift Cipher 3. Transposition Cipher
Cryptography: Crash Course Computer Science #33
 
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Today we’re going to talk about how to keep information secret, and this isn’t a new goal. From as early as Julius Caesar’s Caesar cipher to Mary, Queen of Scots, encrypted messages to kill Queen Elizabeth in 1587, theres has long been a need to encrypt and decrypt private correspondence. This proved especially critical during World War II as Allan Turing and his team at Bletchley Park attempted to decrypt messages from Nazi Enigma machines, and this need has only grown as more and more information sensitive tasks are completed on our computers. So today, we’re going to walk you through some common encryption techniques such as the Advanced Encryption Standard (AES), Diffie-Hellman Key Exchange, and RSA which are employed to keep your information safe, private, and secure. Note: In October of 2017, researchers released a viable hack against WPA2, known as KRACK Attack, which uses AES to ensure secure communication between computers and network routers. The problem isn't with AES, which is provably secure, but with the communication protocol between router and computer. In order to set up secure communication, the computer and router have to agree through what's called a "handshake". If this handshake is interrupted in just the right way, an attacker can cause the handshake to fault to an insecure state and reveal critical information which makes the connection insecure. As is often the case with these situations, the problem is with an implementation, not the secure algorithm itself. Our friends over at Computerphile have a great video on the topic: https://www.youtube.com/watch?v=mYtvjijATa4 Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Want to know more about Carrie Anne? https://about.me/carrieannephilbin The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV Want to find Crash Course elsewhere on the internet? Facebook - https://www.facebook.com/YouTubeCrash... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 184779 CrashCourse
A Competitive Study of Cryptography Techniques over Block Cipher
 
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A Competitive Study of Cryptography Techniques over Block Cipher TO GET THIS PROJECT IN ONLINE OR THROUGH TRAINING SESSIONS CONTACT: Chennai Office: JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai – 83. Landmark: Next to Kotak Mahendra Bank / Bharath Scans. Landline: (044) - 43012642 / Mobile: (0)9952649690 Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai, Thattanchavady, Puducherry – 9. Landmark: Opp. To Thattanchavady Industrial Estate & Next to VVP Nagar Arch. Landline: (0413) - 4300535 / Mobile: (0)8608600246 / (0)9952649690 Email: [email protected], Website: http://www.jpinfotech.org, Blog: http://www.jpinfotech.blogspot.com The complexity of cryptography does not allow many people to actually understand the motivations and therefore available for practicing security cryptography. Cryptography process seeks to distribute an estimation of basic cryptographic primitives across a number of confluences in order to reduce security assumptions on individual nodes, which establish a level of fault-tolerance opposing to the node alteration. In a progressively networked and distributed communications environment, there are more and more useful situations where the ability to distribute a computation between a number of unlike network intersections is needed. The reason back to the efficiency (separate nodes perform distinct tasks), fault-tolerance (if some nodes are unavailable then others can perform the task) and security (the trust required to perform the task is shared between nodes) that order differently. Hence, this paper aims to describe and review the different research that has done toward text encryption and description in the block cipher. Moreover, this paper suggests a cryptography model in the block cipher.
The Zodiac Ciphers - What do we know, and when do we stop trying to solve them?
 
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http://zodiackillerciphers.com This is a talk I gave at the 2015 Cryptologic History Symposium on October 22, 2015. I've been studying the Zodiac ciphers for a while now, and this presentation is a culmination of my research. The talk was part of the "Ciphers and Crime" panel moderated by FBI historian John Fox. Fellow panelists included FBI Cryptanalysis and Racketeering Records Unit chief Dan Olson and encryption technology author Klaus Schmeh. For much more information about the Zodiac Ciphers, please visit http://zodiackillerciphers.com Some bits of the audio dropped out due to technical issues with my sound recorder - apologies for the parts that are hard to understand! BONUS MATERIAL: At the end of the video, I recorded some new material on miscellaneous things I didn't have time to include in the presentation. ERRATA: At 28m59s, I say the 408 is missing a word or phrase between parts 1 and 2. But actually it is missing between parts 2 and 3.
Views: 129606 David Oranchak
Modern jets, retro ciphers: how monoalphabetic substitution ciphers are still in use | Matthew Smith
 
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Technical talks from the Real World Crypto conference series.
Views: 240 Real World Crypto
Homophonic Cryptography Technique for Data Security
 
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Homophonic Cryptography Technique for Data Security To get this project in ONLINE or through TRAINING Sessions, Contact: JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai -83.Landmark: Next to Kotak Mahendra Bank. Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai,Thattanchavady, Puducherry -9.Landmark: Next to VVP Nagar Arch. Mobile: (0) 9952649690, Email: [email protected], web: www.jpinfotech.org, Blog: www.jpinfotech.blogspot.com The complexity of cryptography does not allow many people to actually understand the motivations and therefore available for practicing security cryptography. Cryptography process seeks to distribute an estimation of basic cryptographic primitives across a number of confluences in order to reduce security assumptions on individual nodes, which establish a level of fault-tolerance opposing to the node alteration. In a progressively networked and distributed communications environment, there are more and more useful situations where the ability to distribute a computation between a number of unlike network intersections is needed. The reason back to the efficiency (separate nodes perform distinct tasks), fault-tolerance (if some nodes are unavailable then others can perform the task) and security (the trust required to perform the task is shared between nodes) that order differently. Hence, this paper aims to describe and review the different research that has done toward text encryption and description in the block cipher. Moreover, this paper suggests a cryptography model in the block cipher.
Views: 466 JPINFOTECH PROJECTS
maGneT - Cryptography 3 - Bifid & Trifid Ciphers
 
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Bifid & Trifid Ciphers (updated) - - - Maybe I should come up with a video on what Quadrid should look like? What do you think? Has anyone got any suggestions on a better name? - - - Except where otherwise noted, all images used in my videos are my own work and creation.
Views: 1189 Daniel Judd
Theory and Practice of Cryptography
 
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Google Tech Talks November, 28 2007 Topics include: Introduction to Modern Cryptography, Using Cryptography in Practice and at Google, Proofs of Security and Security Definitions and A Special Topic in Cryptography This talk is one in a series hosted by Google University: Wednesdays, 11/28/07 - 12/19/07 from 1-2pm Speaker: Steve Weis Steve Weis received his PhD from the Cryptography and Information Security group at MIT, where he was advised by Ron Rivest. He is a member of Google's Applied Security (AppSec) team and is the technical lead for Google's internal cryptographic library, KeyMaster.
Views: 112131 GoogleTechTalks
What is a plaintext? What is a ciphertext?
 
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When discussing encryption we frequently use two terms: plaintext andciphertext. The plaintext is the original message that the sender wants to securely deliver to the receiver. The ciphertext is the message that is actually transmitted over the insecure channel. Before transmission, the sender transforms the plaintext into the ciphertext—​this is encryption. When the ciphertext is received, the receiver must transform the ciphertext back into the plaintext—​this is decryption. To be secure, encryption and decryption must require that the sender and receiver possess some secret information or key. The goal of most encryption systems is to ensure that the ciphertext cannot be decrypted—​transformed back into the plaintext—​without that secret key. This prevents an adversary or anyone able to eavesdrop on the connection from recovering the original message plaintext. Credits: Talking: Geoffrey Challen (Assistant Professor, Computer Science and Engineering, University at Buffalo). Producing: Greg Bunyea (Undergraduate, Computer Science and Engineering, University at Buffalo). Part of the https://www.internet-class.org online internet course. A blue Systems Research Group (https://blue.cse.buffalo.edu) production.
Views: 8131 internet-class
Must You Know the Code of f to Securely Compute f?
 
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Talk at crypto 2012. Author: Mike Rosulek. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=24324
Views: 380 TheIACR
Indifferentiability of 8 Round Feistel Networks
 
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Yuanxi Dai and John P. Steinberger, Crypto 2016. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=27683
Views: 197 TheIACR
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: 265334 Physics Girl
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: 14082 The Royal Institution
New Insights on AES Like SPN Ciphers
 
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Bing Sun and Meicheng Liu and Jian Guo and Longjiang Qu and Vincent Rijmen, Crypto 2016. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=27703
Views: 169 TheIACR
How to break a monoalphabetic substitution cipher part 3/3
 
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This is the third video in the series. I apologize for the audio quality. I'm not sure what was causing the background noise.
Views: 871 DJ Hovermale
Complementing Feistel Ciphers
 
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Talk at FSE 2013. Alex Biryukov and Ivica Nikolic. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=25060
Views: 525 TheIACR
TEJ2O0-A, Fall 2013, Nidhi Chokshi, Cryptography Video Submission
 
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Cryptography Challenge TEJ2O0-A, Castlebrooke S.S. Peel District School Board 2013-10-15 Nidhi Chokshi, Navdeep Dhaliwal, Ashvin Dhiman, Rachana Khatri, Ashmita Kumar Phase One: Explain the challenge 1) Our group includes five students in alphabetical order; Nidhi Chokshi, Navdeep Dhaliwal, Ashvin Dhiman, Rachana Khatri, and Ashmita Kumar. 2) This video is based on the cryptography challenge, in Mr. Anderson's Grade 10 Computer Engineering class. There are six participating groups in the class, and each group has encrypted a secret message. 3) All of the encrypted messages are distributed to the six number of groups, and we must attempt to break the encryption with logic, subterfuge, and online analytical tools. 4) We are able to use any and all methods as we choose based on the strengths and weaknesses of the code breaking groups. As for us, we used the language braille for our second level of encryption and this was a weakness for many of our classmates, because it is very difficult to understand a new language especially for people with clear vision, and moreover it was a weakness because the language braille is in dots and the dots were very confusing as to what was the correct way to read and solve the encrypted message. 5) The group that decodes the highest number of encrypted messages wins the challenge. Each student is told to contribute two dollars to the challenge, and the group that decodes the most encrypted messages receives the total amount of money collected. In our class, sixty dollars was collected, and the group that wins the challenge receives the amount collected. Our group decoded the highest amount of encrypted messages, and each member of the group received twelve dollars each. Phase Two: Document Encryption 6) Our groups' favourite encryption method was the method we used to encrypt our secret message into. This method is called a substitution cipher, it is when plaintext is replaced with ciphered text according to a system. For example, the letter A would be replaced to the number nine, so every time the letter A appears in the plaintext it is then substituted to the number nine. So this method is our first level of encryption. For the second level of encryption we put the ciphered text into braille. 7) This method is our favourite because it is random, and without the key, it is very difficult for the opposing teams to decode the message. 8) Our encryption method is profoundly secure, firstly because we had two levels of encryption instead of one. Furthermore, as stated in the video earlier this method is eminently random. Each letter is given it's own substitution, therefore it is not a specific cipher which can be found on a online or other alternate source. Continuing on, we also used the language braille as our second level of encryption, and the language braille is remarkably difficult to understand if the student/person has clear vision. To conclude, our method is profoundly secure because no participating group was able to decode our encrypted message. 9) Demonstrated our method on a three letter word in the video through explanation. 10) To encrypt our message it took our group five days. For the first two days, as a group, we brainstormed ideas of different ciphering methods that we could encrypt our message into. When the ciphering method was chosen, we did research on this specific method to see if it was secure, and difficult. Furthermore, on the third and fourth day we used the method to encrypt our secret message. Each level of encryption took us one day each, therefore on the third day we applied the substitution cipher to plaintext, and on the fourth day we applied the second level of encryption, which is the language braille to the ciphered text. Continuing on, on the fifth day, we proofread to ensure that spelling and grammar was accurate. Phase Three: Document Decryption 11) There were six encrypted messages in the challenge, the first group was the Wingdings Code and our first thoughts on this code was that our entire group knew we had seen that font on Microsoft Word. The second group was the Opposites Code and our first thoughts on this code was this seemed confusing because the letters were all scrambled up. The third group was the Numbers Code and our first thoughts on this code was very easy because we already had a clue how to solve it the first time we saw it. The fourth group was the Lines Code and our first thoughts on this code was we thought it was MENTAL, it was approximately five to six pages long and just seemed impossible to solve. The fifth group was the Numbers, Letters, and Symbols Code and our first thoughts on this code was it was defiantly random and we could tell this because there was no specific pattern. The last group was the Lines and Dots Code and our first thoughts on this code was it was very hard and looked quite confusing.
Views: 191 Nidhi Chokshi
Cipher Challenge: Straddling cipher
 
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The challenge is here: http://www.asecuritysite.com/security/challenges/Straddling
Views: 234 Bill Buchanan OBE
Cryptography Challenge
 
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Cryptography Challenge TEJ2O0-A, Castlebrooke SS Peel District School Board 2014-10-20 Jay, Paul, Sukhraj, Tanish We were the winning group in the Cryptography Challenge in Mr. Anderson’s grade 10 Computer Technology class. The challenge explained: There were 8 groups in the class, and each was given a text. They were to create a key to encrypt the text. All of the encrypted messages were distributed to the 8 groups, and we were to attempt to break encryptions with logic, subterfuge and online analytical tools. We were able to use any and all methods to encrypt and decrypt (besides violence). The winner of the group received $56. How we came up with the numbers used in the first encryption: We used a formula. 10xπ And x represented the prime number that matched the letter we were trying to change, in chronological order. For example, A used 2, B used 3, C used 5, D used 7, E used 11, etc. After we obtained an answer, we rounded to the nearest one. Glossary: Substitution – Replacing characters with different characters Key - Information that changes the input of a message into a cryptographic output. The key is required for the message to be ciphered. The key allows control over encryption and decryption. Online Resource about Substitution http://www.princeton.edu/~achaney/tmve/wiki100k/docs/Substitution_cipher.html
Views: 339 Sukhraj Dhindsa
Beetle Family of Lightweight and Secure Authenticated Encryption Ciphers
 
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Paper by Avik Chakraborti and Nilanjan Datta and Mridul Nandi and Kan Yasuda, presented at CHES 2018. See https://www.iacr.org/cryptodb/data/paper.php?pubkey=28967
Views: 27 TheIACR
NSA Careers Encrypted Tweet - Decryption Process tpfccdlfdtte
 
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Follow up video on how to crack the cipher encryption key systematically: https://www.youtube.com/watch?v=LcsOQexdXZM&list=PLAp8l9zV14TZn5Ze_xgS45UymXZl8V7Rl&index=11 Tweet 2: https://www.youtube.com/watch?v=I8BeSDwNAr4 Tweet 3: https://www.youtube.com/watch?v=8fMDAjOJDmk How to decrypt the @NSACareers tweet from May 5th: tpfccdlfdtte pcaccplircdt dklpcfrp?qeiq lhpqlipqeodf gpwafopwprti izxndkiqpkii krirrifcapnc dxkdciqcafmd vkfpcadf. #MissionMonday #NSA #news Solution: wanttoknowwh atittakestow orkatnsa?chec kbackeachmon dayinmayaswe explorecaree rsessentialt oprotectingo urnation. #gevvemlgmloij #lvi #lhyv NSA tweet: https://twitter.com/NSACareers/statuses/463321993878994945 Khan Academy Intro to Cryptography: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/intro-to-cryptography Backtrack: http://www.backtrack-linux.org Substitution cipher JavaScript site: http://practicalcryptography.com/ciphers/simple-substitution-cipher/ Crypto tool: http://cryptoclub.org/tools/cracksub_topframe.php The 1939 novel "Gadsby" by E. Wright (Without Using the Letter "E") http://en.wikipedia.org/wiki/Gadsby_%28novel%29 Previous recording about the GrrCON Security Conference Crypto Challenge: https://www.youtube.com/watch?v=LeSYpjVKwD4 by Szymon Machajewski Grand Valley State University follow @smProf on Twitter to learn more https://twitter.com/smprof
Views: 3113 Szymon Machajewski
Authenticated and Misuse-Resistant Encryption of Key-Dependent Data
 
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Talk at crypto 2011. Authors: Mihir Bellare, Sriram Keelveedhi. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=23599
Views: 431 TheIACR
Layerone 2013 - Differential Cryptanalysis for Dummies - Jon King
 
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This is a video of my talk at the LayerOne 2013 security conference. In it, I discuss the basics of differential cryptanalysis using the FEAL-4 algorithm as a case-study. For a write-up with pretty pastel-colored diagrams, check out my page on this attack at: http://theamazingking.com/crypto-feal.php
Views: 7742 Jon King
Lightweight Hardware Architectures for the Present Cipher in FPGA projects
 
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Contact Best Phd Topic Visit us: http://phdtopic.com/
Views: 182 Phdtopic com
The Surprising Power of Modern Cryptography
 
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Modern cryptography is surprisingly powerful, yielding capabilities such as secure multi-party computation, computing on encrypted data and hiding secrets in code. Currently, however, some of these advanced abilities are still too inefficient for practical use. This research aims to continue expanding the capabilities of cryptography and its applications and bringing these advanced capabilities closer to practice. In this talk, Stanford PhD. candidate, Mark Zhandry focuses on a particular contribution that addresses both of these objectives: establishing a shared secret key among a group of participants with only a single round of interaction. The first such protocols requires a setup phase, where a central authority determines the parameters for the scheme; unfortunately, this authority can learn the shared group key and must therefore be trusted. He discusses how to remove this setup phase using program obfuscation, though the scheme is very impractical due to the inefficiencies of current obfuscators. He then describes a new technical tool called witness pseudorandom functions and shows how to use this tool in place of obfuscation, resulting in a significantly more efficient protocol. Mark Zhandry is a Ph.D. candidate at Stanford University 02/19/2015 https://www.cs.washington.edu/htbin-post/mvis/mvis?ID=2693 http://uwtv.org
Views: 651 UW Video
First cryptanalysis of the full AES
 
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The Advanced Encryption Standard (AES) is one of the most popular ciphers in the world and is widely used for both commercial and government purposes. Since it became a standard in 2001, the progress in its cryptanalysis has been very slow. Even the best attacks, which exist only on reduced versions, were impractical. New attacks are based on ideas from the cryptanalysis of hash functions. We show how the principle of local collisions exhibits non-tivial properties of the full cipher, and how an optimal attack can be explained as a codeword in the linear key schedule . We present a wide range of attacks: from a pure theoretical boomerang to a practical weakness in the ideal-cipher model, which can be demonstrated on a PC
Views: 708 Microsoft Research
Cryptography Concepts - CompTIA Security+ SY0-501 - 6.1
 
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Security+ Training Course Index: http://professormesser.link/sy0501 Professor Messer’s Course Notes: http://professormesser.link/501cn Frequently Asked Questions: http://professormesser.link/faq - - - - - The basics of cryptography are valuable fundamentals for building a secure network. In this video, you’ll learn about cryptographic terms, the value of the key, the concepts of confusion and diffusion, and more. - - - - - Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 16346 Professor Messer
The SKINNY Family of Lightweight Tweakable Block Ciphers
 
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Christof Beierle and Jérémy Jean and Stefan Kölbl and Gregor Leander and Amir Moradi and Thomas Peyrin and Yu Sasaki and Pascal Sasdrich and Siang Meng Sim, Crypto 2016. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=27684
Views: 202 TheIACR
Key Words and K1-K4 Type Puzzles
 
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What is a Key Word? How to generate a cipher alphabet from it? What are K1, K2, K3 and K4 type puzzles? How to make a keyword dictionary attack program?
Views: 37 jarrod0987
Biometric Encryption System
 
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AcceSys Technology LLC Innovative Research BES - Biometric Encryption System
Views: 343 AcceSysTechnology
What is symmetric encryption?
 
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Cryptography has a fascinating history going back thousands of years. However, until relatively recently all cryptographic algorithms fell into one category referred to as symmetric encryption. In symmetric encryption both the sender and receive share a single key that is used both to encrypt and decrypt messages. Encryption takes a plaintext message and produces a ciphertext. Decryption takes the ciphertext message and produces the originalplaintext. A variety of simple symmetric encryption algorithms exist. Symmetric encryption is still in wide use today, although computers have allowed the algorithms that are used to become significantly more complex and secure. Credits: Talking: Geoffrey Challen (Assistant Professor, Computer Science and Engineering, University at Buffalo). Producing: Greg Bunyea (Undergraduate, Computer Science and Engineering, University at Buffalo). Part of the https://www.internet-class.org online internet course. A blue Systems Research Group (https://blue.cse.buffalo.edu) production.
Views: 531 internet-class
CCS 2016 - On the Practical (In-)Security of 64-bit Block Ciphers
 
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Title: On the Practical (In-)Security of 64-bit Block Ciphers: Collision Attacks on HTTP over TLS and OpenVPN Authors: Karthikeyan Bhargavan and Gaëtan Leurent (INRIA) presented at CCS 2016 - the 23rd ACM Conference on Computer and Communications Security (Hofburg Palace Vienna, Austria / October 24-28, 2016) - organized by SBA Research
Views: 402 CCS 2016
Interview Questions & Answers: Cryptography | Part  2
 
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In this video, we have discussed cryptography interview questions and answers: Q. What is Running Key Cipher? Q. What is Block Cipher? Q. What is Stream Cipher? Q. List out different types of encryption algorithms. Q. List down some Hashing Algorithms. Q. What is Data Encryption Standard (DES)? Q. What is Triple DES (3DES)? Q. What is International Data Encryption Algorithm (IDEA)? Q. What is Cryptographic Life Cycle? Q. What is Advanced Encryption Standard (AES)? Website: http://www.allabouttesting.org Please share and subscribe this video Disclaimer: This video is for educational purpose only. Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use.
Views: 58 All About Testing
Letterlocking: Elizabeth Stuart’s Deciphering Sir Thomas Roe’s Letter: Cryptography, (1626)
 
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Elizabeth Stuart used ciphers, special codes that need a key to unlock them, to hide information from prying eyes. So far seven of her keys, typically alphabets of 24 letters— in seventeenth-century script i/j and u/v were interchangeable—have been found. a=nϗ b=07 c=px d=q5 ... x=k6 y=lw and z=m2 Numbers took the place of some names and words, eg. 201.=Hungary 204.=Transylvania 205.=The Prince of Transylvania, and 206.=Gabor Here Elizabeth decodes a letter sent by Sir Thomas Roe, English ambassador to Constantinople: wµ.22.cӿ.67.eη.gΔ.nϗ.aϗ.px.rη. becomes IMPORTANCE; 205 ‘The Prince of Transylvania'. We don’t know what the original cipher keys would have looked like but we are guessing that they were small and portable. Roe’s letter resides in the National Archives (TNA), Kew Gardens, England. TNA, SP 97/12, fo. 48. Produced by MIT Video Productions (MVP). Directed by Jana Dambrogio, Thomas F. Peterson (1957) Conservator, MIT Libraries, Dr Nadine Akkerman, lecturer in English at Leiden University, and Joe McMasters, Senior Producer of MIT Video Productions. Funded by the Netherlands Organization for Scientific Research (NWO), VENI-project “Female Spies”, and the Massachusetts Institute of Technology (MIT) Libraries. Credits: Elizabeth Stewart, sometime Queen of Bohemia portrayed by Jana Dambrogio, Thomas F Peterson (1957) Conservator, MIT Libraries. Cite as: Jana Dambrogio, Nadine Akkerman, et al. ‘Elizabeth Stuart’s Deciphering Sir Thomas Roe’s Letter: Cryptography (1626)’, Letterlocking Instructional Videos. Filmed: Sep 2014. Duration: 1:54. Posted: Dec 2014. Video URL: [Use URL below]. Date accessed: [Date]. Copyright 2016. Jana Dambrogio, Nadine Akkerman and Massachusetts Institute of Technology (M.I.T). All rights reserved. The following copyrighted material is made available under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) License https://creativecommons.org/licenses/by-nc/4.0/. Contact the M.I.T. Technology Licensing Office for any other licensing inquiries. NB: Letterlock responsibly. Be mindful of open flames or hot tools in the workspace. @letterlocking http://www.letterlocking.org http://www.libraries.mit.edu/preserve http://www.brienne.org Follow our collaborators on Twitter @misswalsingham @NWOHumanities @MITLIbraries @LeidenHum Interested in spies and their secrets? See also Nadine Akkerman, Invisible Agents: Women and Espionage in Seventeenth-Century Britain (Oxford: Oxford University Press, 2018) https://global.oup.com/academic/product/invisible-agents-9780198823018?cc=us&lang=en& The YouTube URL for this video is: http://bit.ly/EStuartCipherKey
VERNAM ICO REVIEW 2018
 
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VERNAM ICO REVIEW 2018 Website: https://www.vernam.com/ Whitepaper: https://www.vernam.com/assets/uploads/Whitepaper_Beta_v015.pdf
Views: 9889 Martins Hacks
Hill Cipher & RSA
 
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Views: 109 Brian Schuler
What is ACOUSTIC CRYPTANALYSIS? What does ACOUSTIC CRYPTANALYSIS mean?
 
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What is ACOUSTIC CRYPTANALYSIS? What does ACOUSTIC CRYPTANALYSIS mean? ACOUSTIC CRYPTANALYSIS meaning - ACOUSTIC CRYPTANALYSIS definition - ACOUSTIC CRYPTANALYSIS explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ In cryptography, acoustic cryptanalysis is a type of side channel attack which exploits sounds emitted by computers or machines. Modern acoustic cryptanalysis mostly focuses on the sounds produced by computer keyboards and internal computer components, but historically it has also been applied to impact printers and electromechanical cipher machines. Victor Marchetti and John D. Marks eventually negotiated the declassification of CIA acoustic intercepts of the sounds of cleartext printing from encryption machines. Technically this method of attack dates to the time of FFT hardware being cheap enough to perform the task—in this case the late 1960s to mid-1970s. However, using other more primitive means such acoustical attacks were made in the mid-1950s. In his book Spycatcher, former MI5 operative Peter Wright discusses use of an acoustic attack against Egyptian Hagelin cipher machines in 1956. The attack was codenamed "ENGULF". In 2004, Dmitri Asonov and Rakesh Agrawal of the IBM Almaden Research Center announced that computer keyboards and keypads used on telephones and automated teller machines (ATMs) are vulnerable to attacks based on the sounds produced by different keys. Their attack employed a neural network to recognize the key being pressed. By analyzing recorded sounds, they were able to recover the text of data being entered. These techniques allow an attacker using covert listening devices to obtain passwords, passphrases, personal identification numbers (PINs), and other information entered via keyboards. In 2005, a group of UC Berkeley researchers performed a number of practical experiments demonstrating the validity of this kind of threat. Also in 2004, Adi Shamir and Eran Tromer demonstrated that it may be possible to conduct timing attacks against a CPU performing cryptographic operations by analyzing variations in acoustic emissions. Analyzed emissions were ultrasonic noise emanating from capacitors and inductors on computer motherboards, not electromagnetic emissions or the human-audible humming of a cooling fan. Shamir and Tromer, along with new collaborator Daniel Genkin and others, then went on to successfully implement the attack on a laptop running a version of GnuPG (an RSA implementation), using either a mobile phone located close to the laptop, or a laboratory-grade microphone located up to 4 m away, and published their experimental results in December 2013. Acoustic emissions occur in coils and capacitors because of small movements when a current surge passes through them. Capacitors in particular change diameter slightly as their many layers experience electrostatic attraction/repulsion or piezoelectric size change. A coil or capacitor which emits acoustic noise will, conversely, also be microphonic, and the high-end audio industry takes steps with coils and capacitors to reduce these microphonics (emissions) because they can muddy a hi-fi amplifier's sound. In March 2015, it was made public that some inkjet printers using ultrasonic heads can be read back using high frequency MEMS microphones to record the unique acoustic signals from each nozzle and using timing reconstruction with known printed data, that is, "confidential" in 12-point font. Thermal printers can also be read using similar methods but with less fidelity as the signals from the bursting bubbles are weaker. The hack also involved implanting a microphone, chip storage IC and burst transmitter with long-life Li+ battery into doctored cartridges substituted for genuine ones sent by post to the target, typically a bank, then retrieved from the garbage using challenge-response RFID chip. A similar work on reconstructing printouts made by dot-matrix printers was publicized in 2011. This kind of cryptanalysis can be defeated by generating sounds that are in the same spectrum and same form as keypresses. If you randomly replay sounds of actual keypresses, it may be possible to totally defeat such kinds of attacks. It is advisable to use at least 5 different recorded variations (36 x 5 = 180 variations) for each keypress to get around the issue of FFT fingerprinting. Alternatively, white noise of a sufficient volume (which may be simpler to generate for playback) will also mask the acoustic emanations of individual keypresses.
Views: 210 The Audiopedia
What Is The Meaning Of Ciphertext?
 
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Ciphertext definition nouna text in encrypted form, as opposed to the plaintext 11 mar 2016 study of cryptography terms and ciphertext are used methods obtain true meaning 27 may 2017 computer dictionary for what means including related links, information, define enciphered form a or its elements compare. It is the unreadable output of an encryption algorithm. What is ciphertext? Definition and meaning businessdictionary ciphertext dictionary definition plaintext the tech faq. Googleusercontent search. Ciphertext? Definition from whatis what is ciphertext? . The term 'cipher' is in cryptography, cipher text (ciphertext) data that has been encrypted. Cipher text definition of cipher by the free dictionary. Cipher text is unreadable until it has been converted into plain (decrypted) with a definition of ciphertext encrypted or message in its coded human form. Plaintext should not be confused with plain text. Ciphertext? Definition from whatis ciphertext wikipedia en. Ciphertext definition and meaning wordnikciphertext vsencryption what does the cipher text overhead means ciphertext youtube. In cryptography, ciphertext or cyphertext is the result of encryption performed on plaintext using an algorithm, called a cipher encrypted text. The latter refers to text consisting. Plaintext is what you have before encryption, and ciphertext the encrypted result. Plaintext definition by the linux information project. Introduction to cryptography definition columbia cs. Meaning, pronunciation, translations and examples define ciphertext. What is cipher text (ciphertext)? Webopedia definition. The term cipher is sometimes used as an alternative for ciphertext, but it more appropriately means the method of what does workation mean? . Cypher text is the output of an encryption process, and input a before we have plaintext, ciphertext result. Definition of 'ciphertext' the economic times. Cipher text synonyms, cipher pronunciation, translation, english dictionary definition of textcomputers 1 ciphertext a in encrypted form, as opposed to the plain 19 oct 2007 if you store password database, would it either cleartext or ciphertext, usually text, meaning is overhead positive difference length between what does ''latency'' really mean when block partially unrolled? Process data into unintelligible reversibly, without loss authentication not an impostor encryption decryption plaintext feb 2006 message after before. What is ciphertext? Computer hope. Ciphertext synonyms, ciphertext pronunciation, translation, english dictionary definition of ciphertexta text in encrypted form, define cipher. Ciphertext definition of ciphertext by the free dictionary. Wikipedia wiki ciphertext url? Q webcache. The term cipher is sometimes used as a synonym for ciphertext, but it more properly means the method of encryption rather than result definition an algorithm which applied to plain text get ciphertext. Definition of ciphertext by merriam webstercollins english dictionary.
Views: 106 Aile Aile
Classical Cryptographic Protocols in a Quantum World
 
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Talk at crypto 2011. Authors: Adam Smith, Sean Hallgren, Fang Song. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=23587
Views: 422 TheIACR
OWASP00 Software Security Cryptography Aaron Bedra
 
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These are the videos from Central Ohio Infosec 2015: http://www.irongeek.com/i.php?page=videos/centralohioinfosec2015/mainlist
Views: 139 Adrian Crenshaw
In Focus: Willy Susilo Research
 
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Prof. Susilo talks about his research in Improving e-commerce via Multi-party Fair Exchange for Digital Services.
Views: 935 uownow
NTUA Cryptography 2015 -- Lecture 1
 
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1η Διάλεξη Κρυπτογραφίας ΕΜΠ 2015 -- 2016 Θέμα: Οργανωτικά και Ιστορική Κρυπτογραφία Διδάσκων: Διονύσης Ζήνδρος Ιστότοπος μαθήματος: http://crypto-class.gr/
Views: 2884 studentinitiative
Breaking and Repairing GCM Security Proofs
 
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Talk at crypto 2012. Authors: Tetsu Iwata, Keisuke Ohashi, Kazuhiko Minematsu. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=24296
Views: 684 TheIACR
A Practical Cryptanalysis of the Algebraic Eraser
 
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Adi Ben-Zvi and Simon R. Blackburn and Boaz Tsaban, Crypto 2016. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=27648
Views: 198 TheIACR
Order-Preserving Encryption Revisited: Improved Security Analysis and Alternative Solutions
 
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Talk at crypto 2011. Authors: Alexandra Boldyreva, Adam O'Neill, Nathan Chenette. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=23597
Views: 1438 TheIACR

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