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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: 58283 Pico Cetef
Substitution Cipher and Cryptanalysis
 
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Subject:Computer Science Paper: Cryptography and network
Views: 211 Vidya-mitra
Vigenere Cipher 1
 
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Encrypt the message MAKE IT HAPPEN using the Vigenėre cipher and key word MATH.
Views: 141840 MathAfterMath
Cracking a Simple Substitution Cipher (Demo)
 
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Here I demonstrate using Simon Singh's Substitution Cracking Tool to decipher a message that was encrypted using a simple (i.e. monoalphabetic) substitution cipher. The basic tool used is frequency analysis, which the Tool does automatically.
Views: 2357 David Metzler
TY BSc-IT - NS Unit 1 - Lec 4 - CRYPTOGRAPHY TECHNIQUES, Substitution, Transposition, Ceasar Cipher
 
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The point discussed in this lecture:- 1. CRYPTOGRAPHY TECHNIQUES 1.1. Cryptography 1.2. Cryptanalysis 1.3. Cryptology 2. Basic Concepts ( terminology) 3. PLAIN TEXT AND CIPHER TEXT 3.1. Substitution Techniques 3.2. Transposition Technique 4. Techniques for transforming plain text to cipher text 5. Cipher 5.1. Classical Ciphers 5.1.1. Substitution Cipher 1- Monoalphabetic Cipher 2- Polyalphabetic Cipher 3- Polygram Cipher. 4- Homophonic Cipher. 5.1.2. Transposition Cipher 6. Ceasar Cipher Download notes from here:- https://drive.google.com/open?id=0B_0qcYrYEFTBTWN2U3V3NGNhbGc All other material by me @ this link:- https://drive.google.com/open?id=0B_0qcYrYEFTBWjVtbS0ydjJ1REU
Views: 653 Tirup Parmar
Cryptography: The Science of Making and Breaking Codes
 
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There are lots of different ways to encrypt a message, from early, simple ciphers to the famous Enigma machine. But it’s tough to make a code truly unbreakable. Hosted by: Michael Aranda ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without them! Shout out to Justin Ove, John Szymakowski, Fatima Iqbal, Justin Lentz, David Campos, and Chris Peters. ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow Or help support us by becoming our patron on Patreon: https://www.patreon.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow Sources: http://www.vectorsite.net/ttcode_04.html#m3 http://www.simonsingh.net/The_Black_Chamber/crackingprinciple.html http://book.itep.ru/depository/crypto/Cryptography_history.pdf http://www.cs.trincoll.edu/~crypto/historical/gronsfeld.html http://www.sans.org/reading-room/whitepapers/vpns/history-encryption-730 http://ftp.stmarys-ca.edu/jsauerbe/m10s11/chapter5.pdf http://www.turing.org.uk/scrapbook/ww2.html http://enigma.louisedade.co.uk/howitworks.html http://www.codesandciphers.org.uk/enigma/example1.htm http://www.pbs.org/wgbh/nova/military/how-enigma-works.html http://www.cs.miami.edu/~burt/learning/Csc609.051/notes/02.html
Views: 786564 SciShow
Book Code
 
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Video describing how to use the Book Code.
Views: 843 Victoria Strickland
Vigenere CIpher
 
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This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 42577 Udacity
Pig Pen Code
 
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Pig pen code - Showing how to cipher pig pen code
Views: 17040 4aRainyDay
NETWORK SECURITY - BLOCK CIPHER MODES OF OPERATION
 
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1. Electronic Code Book Mode 2. Cipher Block Chaining Mode 3. Output Feedback Mode 4. Cipher Feedback Mode 5. Counter Mode
Homesick - How to Decode the Ciphers in Letters/Books
 
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Here's how I decoded the ciphers... I learned later in playing that there's a game mechanic for doing this as well. It would have been more efficient if I'd waited! Story of my life :). Let me know if you have any questions/thoughts. BTW, the name at the end is Sabine, not Sebina. A/E difficulties.
Views: 474 Q Cucurbit
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: 130243 Lacey Wright
What is Book cipher? Explain Book cipher, Define Book cipher, Meaning of Book cipher
 
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~~~ Book cipher ~~~ Title: What is Book cipher? Explain Book cipher, Define Book cipher, Meaning of Book cipher Created on: 2018-08-18 Source Link: https://en.wikipedia.org/wiki/Book_cipher ------ Description: A book cipher is a cipher in which the key is some aspect of a book or other piece of text. Books, being common and widely available in modern times, are more convenient for this use than objects made specifically for cryptographic purposes. It is typically essential that both correspondents not only have the same book, but the same edition.Traditionally book ciphers work by replacing words in the plaintext of a message with the location of words from the book being used. In this mode, book ciphers are more properly called codes. This can have problems; if a word appears in the plaintext but not in the book, it cannot be encoded. An alternative approach which gets around this problem is to replace individual letters rather than words. One such method, used in the second Beale cipher, substitutes the first letter of a word in the book with that word's position. In this case, the book cipher is properly a cipher — specifically, a homophonic substitution cipher. However, if used often, this technique has the side effect of creating a larger ciphertext and increases the time and effort required to decode the message. ------ To see your favorite topic here, fill out this request form: https://docs.google.com/forms/d/e/1FAIpQLScU0dLbeWsc01IC0AaO8sgaSgxMFtvBL31c_pjnwEZUiq99Fw/viewform ------ Source: Wikipedia.org articles, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. Support: Donations can be made from https://wikimediafoundation.org/wiki/Ways_to_Give to support Wikimedia Foundation and knowledge sharing.
Views: 78 Audioversity
The Caesar cipher | Journey into cryptography | Computer Science | Khan Academy
 
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Brit explains the Caesar cipher, the first popular substitution cipher, and shows how it was broken with "frequency analysis" Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/polyalphabetic-cipher?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/intro-to-cryptography?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: 591363 Khan Academy
FREEMASON CIPHER - Secrecy is a weapon
 
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Follow me here ► https://steemit.com/@digitaltrends47 The pigpen cipher alternately referred to as the masonic cipher. It is a geometric simple substitution which exchanges letters for symbols, which are fragments of a grid. In earlier times the Freemason used cipher to write correspondence , Send messages or keep records. It is seldom used today, but remains a part of our lesser known history , none the less. They wanted to communicate among themselves Without other people understanding what they wrote . Music by AndewG - https://soundcloud.com/andrew_g-2 To use this music in your videos or media projects, you must first purchase a license. KEYWORDS: freemason cipher pigpen cipher masonic cipher how freemason communicate mason masonic cipher book, masonic cipher translator, masonic cipher, masonic cipher book translation pigpen cipher pigpen cipher solver, pigpen cipher explained, pigpen cipher tutorial, pigpen cipher example, pigpen cipher how to solve, pigpen cipher, pigpen cipher worksheet pig pen cipher, pigpen cipher pig pen cipher, pigpen cipher the lost symbol the lost symbol The Lost Symbol Magic Squares and the Masonic Cipher
Views: 7535 Digital Trends 47
How to use the Vigenère Cipher
 
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How to use the Vigenère Cipher - one of the best cipher of all time. DOWNLOAD VIGENÈRE TABLE: http://i.imgur.com/GemngCa.jpg
Views: 68176 Brian R
Cryptography and Network Security - Block ciphers - Modes of Operation(Part 1) - GATE CSE
 
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The complete YouTube playlist can be viewed here: https://goo.gl/mjyDev This lesson explains Block ciphers - Modes of Operation, under the course, "Cryptography and Network Security for GATE Computer Science Engineering". The lesson explains the following subtopics: Block Ciphers - Modes of Operation Electronic Codebook Mode Cipher Block Chaining Mode - Encryption and Decryption Some important terminology and concepts are also illustrated, for the better understanding of the subject. For the entire course: https://goo.gl/aTMBNZ For more lessons by Ansha Pk: https://goo.gl/2DX9Wn Must watch for all the GATE/ESE/PSU Exams. Download the Unacademy Learning App from the Google Play Store here:- https://goo.gl/02OhYI Download the Unacademy Educator app from the Google Play Store here: https://goo.gl/H4LGHE Do Subscribe and be a part of the community for more such lessons here: https://goo.gl/UGFo7b Visit Our Facebook Group on GATE here: https://goo.gl/cPj5sb Cryptography and Network Security - Block Ciphers - Modes of Operation(Part 1) - GATE CSE
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: 169268 Kenny Luminko
Cryptography Lesson #1 - Block Ciphers
 
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This tutorial video will help provide an understanding of what block ciphers are, and how they are used in the field of cryptography.
Views: 127067 Ryan Kral
Electronic Code Book(ECB) | Algorithm Modes in Cryptography
 
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In this network security video tutorial we will study and understand the working of Electronic Code Block also known as ECB algorithm mode. Electronic Code Block (ECB) - 1. The simplest mode of operation 2. Plain text message is divided into blocks of 64 bits each. 3. Each such block is encrypted independently of the other blocks. 4. For all blocks same key is used for encryption. 5. If a plain text block repeats in the original messages, the corresponding cipher text block will also repeat in the encrypted message. 6. Suitable only for small messages. 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/ #ElectronicCodeBook #AlgorithmModes #NetworkSecurity #ECB #Cryptography #BlockCiphers
Views: 1253 Simple Snippets
Letter Frequency of Ciphers
 
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This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 6208 Udacity
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: 187479 CrashCourse
Top 10 Uncracked Codes and Ciphers
 
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Not even the greatest minds of the world could decipher these codes. Join http://www.WatchMojo.com as we count down our picks for the Top 10 Uncracked Codes and Ciphers. Check us out at http://www.Twitter.com/WatchMojo, http://instagram.com/watchmojo and http://www.Facebook.com/WatchMojo. Also, check out our interactive Suggestion Tool at http://www.WatchMojo.com/suggest :) Special thanks to our user kenn1987 for submitting this idea through our Suggest Tool at http://www.WatchMojo.com/Suggest Check out the voting page here, http://watchmojo.com/suggest/Top+10+Uncracked+Codes/Ciphers If you want to suggest an idea for a WatchMojo video, check out our interactive Suggestion Tool at http://www.WatchMojo.com/suggest :) Want a WatchMojo cup, mug, t-shirts, pen, sticker and even a water bottle? Get them all when you order your MojoBox gift set here: http://watchmojo.com/store/xmas.php WatchMojo is a leading producer of reference online video content, covering the People, Places and Trends you care about. We update DAILY with 2-3 Top 10 lists, Origins, Biographies, Versus clips on movies, video games, music, pop culture and more!
Views: 511939 WatchMojo.com
How to make a Caesar cipher in c++
 
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This video tutorial demonstrates how to write a Caesar cipher in c++. The corresponding documentation can be found at http://en.wikipedia.org/wiki/Caesar_c... paste bin file: http://pastebin.com/FKe5J8wt
Views: 55988 David
Creating An Unbreakable Cipher (nearly)
 
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Creating Ciphers can be fun, but understanding how they work by using a simple example of developing a cipher is a great way to understand them. This video covers the development of a cipher algorithm and shows how to make it (nearly) unbreakable.
Lecture 8: Advanced Encryption Standard (AES) by Christof Paar
 
01:33:19
For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com. The AES book chapter for this video is also available at the web site (click Sample Chapter).
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: 12747 nptelhrd
How Encryption Keeps Your Data Safe
 
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Start protecting yourself on the web at https://NordVPN.com/SCISHOW or use code SCISHOW to save 75% off of a 3-year Virtual Private Network plan, plus 1 month free. Keeping our data safe and secure is necessary in today's world, but a lot of the encryption we depend on has been in development for thousands of years! Hosted by: Stefan Chin Head to https://scishowfinds.com/ for hand selected artifacts of the universe! ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Lazarus G, Sam Lutfi, D.A. Noe, الخليفي سلطان, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, charles george, Kevin Bealer, Chris Peters ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://book.itep.ru/depository/crypto/Cryptography_history.pdf https://www.sans.org/reading-room/whitepapers/vpns/history-encryption-730 http://cryptogramma.com/cryptogramma/How_it_works.html https://books.google.com/books?id=Zb2RBQAAQBAJ&lpg=PA14&ots=ycTpjodUS3&pg=PA14#v=onepage&f=false https://www.britannica.com/topic/transposition-cipher https://books.google.com/books?id=o3YbiVuTg70C&lpg=PP1&pg=PT29#v=onepage&q&f=false http://penelope.uchicago.edu/Thayer/E/Roman/Texts/Plutarch/Lives/Lysander*.html https://www.coursera.org/lecture/symmetric-crypto/product-cipher-d1DgA http://www.moserware.com/2009/09/stick-figure-guide-to-advanced.html https://www.youtube.com/watch?v=aH6h52aMGT8 https://dl.acm.org/citation.cfm?id=1824151 http://www.networkdls.com/Articles/tr-601.pdf ftp://ftp.rsasecurity.com/pub/pdfs/tr701.pdf https://link.springer.com/content/pdf/10.1007%2FBFb0040277.pdf http://cacr.uwaterloo.ca/hac/about/chap6.pdf https://www.youtube.com/watch?v=MsqqpO9R5Hc https://www.youtube.com/watch?v=GSIDS_lvRv4 https://www.digicert.com/TimeTravel/math.htm
Views: 86263 SciShow
How to Create a Vigenère Cipher
 
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How to create a Vigenère cipher as seen in, "The Code Book" by Simon Singh.
Views: 500 HTFlanagan
Block Cipher Modes of Operation | CFB mode | Mode of operation of block cipher | Part 3 | Hindi Urdu
 
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#askfaizan | #syedfaizanahmad | #cfb Block Cipher Modes of Operation | CBC mode | Part 2 https://youtu.be/Q7LKmASkVSU Block Cipher Modes of Operation | ECB mode | Part 1 https://youtu.be/mkY5mNSnuko Hill Cipher | Complete Algorithm with Example https://youtu.be/B0Q7w7Fd7ms Playfair Substitution Cipher https://youtu.be/w_xr7pj-O6c Monoalphabetic Substitution Cipher https://youtu.be/Hw1T7GOnVW0 Caesar Cipher | Caesar Substitution Cipher https://youtu.be/2N9GlhysYJw PlayList : Cryptography and Network Security : https://www.youtube.com/playlist?list=PLhwpdymnbXz7hvvqhqjIIG4tEdhAgQqll Block cipher processes the data blocks of fixed size If size of message is larger than block size. Then, the message is divided into a series of sequential message blocks. Multiple blocks of plaintext are encrypted using the same key, security issues arise. To apply a block cipher in a variety of applications, five modes of operation have been defined by NIST 1. Electronic Code Book Mode 2. Cipher Block Chaining Mode 3. Output Feedback Mode 4. Cipher Feedback Mode 5. Counter Mode The simplest mode is the electronic codebook (ECB) mode Plaintext is handled one block at a time Each block of plaintext is encrypted using the same key The ECB mode is deterministic If plaintext block P1, P2,…, Pm are encrypted twice under the same key, the output ciphertext blocks will be the same. CBC is technique in which the same plaintext block, if repeated, produces different ciphertext blocks Each plaintext block is XORed with the ciphertext block that was previously produced To produce the first block of ciphertext, an initialization vector (IV) is XORed with the first block of plaintext For decryption, IV data is XORed with first ciphertext block decrypted. CFB is similar to CBC, it also make use of Initialization Vector. In CFB, plaintext (b bits) is divided into segments of s bits. Process s bits at a time. Common value of s is 8 bits. Cipher text block is encrypted and the output is XOR-ed with the current Plain text block to create the current Cipher text block. Each ciphertext block gets ‘fed back’ into the encryption process in order to encrypt the next plaintext block.
Views: 512 Ask Faizan
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: 130212 David Oranchak
Encryption Concepts - Information Security Lesson #6 of 12
 
01:02:38
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: 32020 Dr. Daniel Soper
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: 448569 World Science Festival
Cryptology - Part 3: Bacon's Cipher
 
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The video clearly explains Bacon's cipher / Baconian cipher in encoding and decoding secret messages. www.learncryptology.appspot.com www.chukwuemeka-samuel.appspot.com www.samuelchukwuemeka.com
Views: 548 Samuel Chukwuemeka
The Substitute - Book I- Trailer
 
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Book trailer of the novel The Substitute- Book I by Tionne Rogers Trailer designed by Higashi. [email protected] www.lulu.com/spotlight/Tionne74
Views: 11988 TionneRogers
Block Cipher Modes of Operation | CBC mode | Mode of operation of block cipher | Part 2 | Hindi Urdu
 
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#askfaizan | #syedfaizanahmad | #cbc Block Cipher Modes of Operation | ECB mode | Part 1 https://youtu.be/mkY5mNSnuko Hill Cipher | Complete Algorithm with Example https://youtu.be/B0Q7w7Fd7ms Playfair Substitution Cipher https://youtu.be/w_xr7pj-O6c Monoalphabetic Substitution Cipher https://youtu.be/Hw1T7GOnVW0 Caesar Cipher | Caesar Substitution Cipher https://youtu.be/2N9GlhysYJw PlayList : Cryptography and Network Security : https://www.youtube.com/playlist?list=PLhwpdymnbXz7hvvqhqjIIG4tEdhAgQqll Block cipher processes the data blocks of fixed size If size of message is larger than block size. Then, the message is divided into a series of sequential message blocks. Multiple blocks of plaintext are encrypted using the same key, security issues arise. To apply a block cipher in a variety of applications, five modes of operation have been defined by NIST 1. Electronic Code Book Mode 2. Cipher Block Chaining Mode 3. Output Feedback Mode 4. Cipher Feedback Mode 5. Counter Mode The simplest mode is the electronic codebook (ECB) mode Plaintext is handled one block at a time Each block of plaintext is encrypted using the same key The ECB mode is deterministic If plaintext block P1, P2,…, Pm are encrypted twice under the same key, the output ciphertext blocks will be the same. CBC is technique in which the same plaintext block, if repeated, produces different ciphertext blocks Each plaintext block is XORed with the ciphertext block that was previously produced To produce the first block of ciphertext, an initialization vector (IV) is XORed with the first block of plaintext For decryption, IV data is XORed with first ciphertext block decrypted.
Views: 779 Ask Faizan
Symmetric Key Cryptography VS Asymmetric Key Cryptography | Private vs Public Key Cryptography
 
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Understand the working of Symmetric Key Cryptography and Asymmetric Key Cryptography in detail with working and difference between the 2 types. Symmetric Key Cryptography(Private Key Cryptography) - 1. In symmetric-key cryptography, the same key is used by the sender (for encryption) and the receiver(for decryption). 2. The key is shared. 3. The key is Secret and kept Private between the Sender & Receiver 4. For N users in a network the number of keys required is - N(N-1)/2 Asymmetric Key Cryptography(Public Key Cryptography) 1. In asymmetric-key cryptography, 2 different keys are used. 1 for Encryption & 1 for Decryption. 2. Every communicating party needs just a key pair. 3. One of the two keys is called as Public Key and the other is the Private Key. 4. Private key remains as a secret. Public key is for the general public. 5. Only the corresponding public private key pair and encrypt and decrypt messages and no other key can be used. 6. For N users in a network the number of keys required is - N*2. 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/ #SymmetricKeyCryptography #AsymmetricKeyCryptography #NetworkSecurity #Cryptography
Views: 610 Simple Snippets
Modes of Operations
 
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Subject:Computer Science Paper: Cryptography and network
Views: 4172 Vidya-mitra
#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
Book Of Ciphers
 
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This is a school project on ciphers.
Views: 15 Siti Saiyidah
Cipher Encoder
 
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http://demonstrations.wolfram.com/CipherEncoder/ The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily. Substitution ciphers are one of the simplest forms of encryption, where replacement rules are provided that map each letter of the alphabet onto a different letter. Contributed by: Jon McLoone
Views: 765 wolframmathematica
Block Cipher Modes of Operation | ECB mode | Mode of operation of block cipher | Part 1 | Hindi Urdu
 
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#askfaizan | #syedfaizanahmad Block Cipher Modes of Operation | CBC mode | Part 2 https://youtu.be/Q7LKmASkVSU Hill Cipher | Complete Algorithm with Example https://youtu.be/B0Q7w7Fd7ms Playfair Substitution Cipher https://youtu.be/w_xr7pj-O6c Monoalphabetic Substitution Cipher https://youtu.be/Hw1T7GOnVW0 Caesar Cipher | Caesar Substitution Cipher https://youtu.be/2N9GlhysYJw PlayList : Cryptography and Network Security : https://www.youtube.com/playlist?list=PLhwpdymnbXz7hvvqhqjIIG4tEdhAgQqll Block cipher processes the data blocks of fixed size If size of message is larger than block size. Then, the message is divided into a series of sequential message blocks. Multiple blocks of plaintext are encrypted using the same key, security issues arise. To apply a block cipher in a variety of applications, five modes of operation have been defined by NIST 1. Electronic Code Book Mode 2. Cipher Block Chaining Mode 3. Output Feedback Mode 4. Cipher Feedback Mode 5. Counter Mode The simplest mode is the electronic codebook (ECB) mode Plaintext is handled one block at a time Each block of plaintext is encrypted using the same key The ECB mode is deterministic If plaintext block P1, P2,…, Pm are encrypted twice under the same key, the output ciphertext blocks will be the same. CBC is technique in which the same plaintext block, if repeated, produces different ciphertext blocks Each plaintext block is XORed with the ciphertext block that was previously produced To produce the first block of ciphertext, an initialization vector (IV) is XORed with the first block of plaintext For decryption, IV data is XORed with first ciphertext block decrypted.
Views: 630 Ask Faizan
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: 162 Palace Guard
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
How to Solve a Cryptogram - Twitterati Cryptograms
 
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How to solve cryptograms, cryptoquips, and cryptoquotes. For more puzzles, visit http://www.twitteraticryptograms.com.
Views: 26290 Tammy Donroe
Substitution cipher
 
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Substitution cipher In cryptography, a substitution cipher is a method of encoding by which units of plaintext are replaced with ciphertext, according to a fixed system; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth.The receiver deciphers the text by performing the inverse substitution. =======Image-Copyright-Info======= Image is in public domain Author-Info: en:User:Matt Crypto Image Source: https://en.wikipedia.org/wiki/File:ROT13.png =======Image-Copyright-Info======== -Video is targeted to blind users Attribution: Article text available under CC-BY-SA image source in video https://www.youtube.com/watch?v=t7ik222jAdI
Views: 279 WikiAudio

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