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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: 62419 Pico Cetef
Vigenere Cipher 1
 
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Encrypt the message MAKE IT HAPPEN using the Vigenėre cipher and key word MATH.
Views: 157491 MathAfterMath
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
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: 811343 SciShow
Vigenere CIpher
 
02:02
This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 58179 Udacity
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.
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: 2810 David Metzler
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: 243 Audioversity
Book Code
 
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Video describing how to use the Book Code.
Views: 1246 Victoria Strickland
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: 2951 Simple Snippets
Counter Mode Encryption (CTR) | Algorithm Modes in Cryptography
 
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In this network security video tutorial we will study and understand the working of Counter Mode (CTR) also known as CTR algorithm mode. Counter Mode (CTR) - 1. Counter Mode uses sequence numbers called as counters as the inputs. 2. Usually a constant is used as the initial counter value Incremented for every iteration. 3. The size of the counter block is same as that of the plain text block. 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/ #CounterMode #AlgorithmModes #NetworkSecurity #Cryptography #BlockCiphers
Views: 1636 Simple Snippets
Cipher Block Chaining (CBC) | Algorithm Modes in Cryptography
 
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In this network security video tutorial we will study and understand the working of Cipher Block Chaining (CBC) also known as CBC algorithm mode. Cipher Block Chaining (CBC) - 1. Chaining adds a feedback mechanism to a block cipher 2. The results of the encryption of the previous block are fed back into the encryption of the current block. 3. In the first step; the first block of plain text and a random block of text, called Initialization Vector (IV) is used. 4. The IV has no special meaning it is simply used to make each message unique. 5. The value of IV is generated randomly. 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/ #CipherBlockChaining #AlgorithmModes #NetworkSecurity #Cryptography #BlockCiphers
Views: 3942 Simple Snippets
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
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: 597914 Khan Academy
Cipher Block Chaining Mode - 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: 61498 Udacity
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: 144040 Lacey Wright
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: 7626 Udacity
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: 158371 Sundeep Saradhi Kanthety
'Der Eisendrache' | The Book Cipher Explained!
 
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I understand that I mixed up Pohnpei with Pompeii, but the logic here is still very sound and reasonable to believe this is the method to the cipher here. Donate ► https://www.twitchalerts.com/donate/m... Check out my website ► http://www.joetrocious.com I Record PC Gameplay With ► http://www.playclaw.com Twitter ► https://twitter.com/JoeTrocious Facebook ► http://tinyurl.com/o8agzkw Instagram ► http://instagram.com/joetrocious Audio file(s) provided by ►http://www.audiomicro.com Thanks for your support! ♥ JoeTrocious
Views: 1761 MrJoeTrocious
One-Time Pad
 
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Views: 10583 artmediagrouppl
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: 33153 Dr. Daniel Soper
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).
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: 1443 Ask Faizan
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: 215751 CrashCourse
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: 13252 nptelhrd
Aristocrat Cipher How To Solve
 
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This is a simple and easy-to-follow video on how to solve a aristocrat cipher
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: 1156 Ask Faizan
Key Cipher
 
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Views: 189 Kyle Kitchen
Book Cipher
 
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This video is about Book Cipher
Views: 27 Matthew Dominicis
Block Cipher Mode : Electronic Codebook (ECB) Mode Explained in Hindi
 
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📚📚📚📚📚📚📚📚 GOOD NEWS FOR COMPUTER ENGINEERS INTRODUCING 5 MINUTES ENGINEERING 🎓🎓🎓🎓🎓🎓🎓🎓 SUBJECT :- Discrete Mathematics (DM) Theory Of Computation (TOC) Artificial Intelligence(AI) Database Management System(DBMS) Software Modeling and Designing(SMD) Software Engineering and Project Planning(SEPM) Data mining and Warehouse(DMW) Data analytics(DA) Mobile Communication(MC) Computer networks(CN) High performance Computing(HPC) Operating system System programming (SPOS) Web technology(WT) Internet of things(IOT) Design and analysis of algorithm(DAA) 💡💡💡💡💡💡💡💡 EACH AND EVERY TOPIC OF EACH AND EVERY SUBJECT (MENTIONED ABOVE) IN COMPUTER ENGINEERING LIFE IS EXPLAINED IN JUST 5 MINUTES. 💡💡💡💡💡💡💡💡 THE EASIEST EXPLANATION EVER ON EVERY ENGINEERING SUBJECT IN JUST 5 MINUTES. 🙏🙏🙏🙏🙏🙏🙏🙏 YOU JUST NEED TO DO 3 MAGICAL THINGS LIKE SHARE & SUBSCRIBE TO MY YOUTUBE CHANNEL 5 MINUTES ENGINEERING 📚📚📚📚📚📚📚📚
Views: 4584 5 Minutes Engineering
TY BSc-IT - NS Unit 1 - Lec 7 - Hill Cipher, Rail Fence,Simple Columnar, Vernam Cipher, Book Cipher
 
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The point discussed in this lecture:- 1. Hill Cipher 2. Transposition techniques 2.1. Rail Fence Cipher:- Rail fence of depth 2, Rail fence of depth 3 2.2. Simple Columnar Transposition Technique. 2.3. Vernam Cipher (one-time pad) 2.4. Book Cipher/Running-Key Cipher 3. Encryption & Decryption 4. The important aspects of Encryption & Decryption process. 5. two types of cryptography mechanisms:- 5.1. Symmetric Key Cryptography 5.2. Asymmetric Key Cryptography 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: 412 Tirup Parmar
How Encryption Keeps Your Data Safe
 
10:04
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: 90096 SciShow
Playfair Cipher Explained
 
04:20
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: 179825 Kenny Luminko
ECB Problem #1
 
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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: 2123 Udacity
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: 58366 David
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: 1196 Ask Faizan
Book Of Ciphers
 
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This is a school project on ciphers.
Views: 19 Siti Saiyidah
What does substitution cipher mean?
 
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What does substitution cipher mean? A spoken definition of substitution cipher. Intro Sound: Typewriter - Tamskp Licensed under CC:BA 3.0 Outro Music: Groove Groove - Kevin MacLeod (incompetech.com) Licensed under CC:BA 3.0 Intro/Outro Photo: The best days are not planned - Marcus Hansson Licensed under CC-BY-2.0 Book Image: Open Book template PSD - DougitDesign Licensed under CC:BA 3.0 Text derived from: http://en.wiktionary.org/wiki/substitution_cipher Text to Speech powered by TTS-API.COM
#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: 138 Focus Group
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: 69947 Brian R
Block Cipher Modes of Operation | OFB mode | Mode of operation of block cipher | Part 4 | Hindi Urdu
 
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#askfaizan | #syedfaizanahmad | #ofb Block Cipher Modes of Operation | CFB mode https://youtu.be/yF_iA7Rv7k4 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. The output feedback (OFB) mode is similar in structure to that of CFB. In CFB, the ciphertext unit is fed back to the shift register, In OFB, The output of the encryption function is fed back to the shift register. It remains localized to one single block, Affecting one plaintext block affects one ciphertext block only Complementing a bit in the ciphertext complements a bit in the plaintext.
Views: 772 Ask Faizan
Vigenere Cipher C Program
 
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Vigenere cipher c program for encryption Please Subscribe ! Get the code here: https://github.com/randerson112358/C-Programs/blob/master/vigenereCipher.c See video on Caesar Cipher: https://youtu.be/DsYKagOoap0 ►Website: http://everythingcomputerscience.com/ ►Books: PROGRAMMING C-Programming - https://www.amazon.com/gp/product/0131103628/ref=as_li_tl?ie=UTF8&tag=everythingc06-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=0131103628&linkId=764c7627ffb13944091b2ad15fb5de90 Head First Java - https://www.amazon.com/gp/product/0596009208/ref=as_li_tl?ie=UTF8&tag=everythingc06-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=0596009208&linkId=58082f233879197beb1aeb73b03c1ed8 DISCRETE STRUCTURES/MATHEMATICS Discrete Mathematics Workbook- https://www.amazon.com/gp/product/0130463272/ref=as_li_tl?ie=UTF8&tag=everythingc06-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=0130463272&linkId=83220d3b9eb58fb0566fa51c0e5b5571 Practice Problems in Discrete Mathematics -https://www.amazon.com/gp/product/0130458031/ref=as_li_tl?ie=UTF8&tag=everythingc06-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=0130458031&linkId=e6c98555ea0342d902afda0221a1a8fb ALGORITHMS Algorithm Analysis - https://www.amazon.com/gp/product/0262033844/ref=as_li_tl?ie=UTF8&tag=everythingc06-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=0262033844&linkId=ba3b1d4075fbd043bb4596a0df9402e9
Views: 4461 Computer Science
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: 495 Q Cucurbit
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: 166 Palace Guard
Network Security - Basic Cryptography
 
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Fundamentals of Computer Network Security This specialization in intended for IT professionals, computer programmers, managers, IT security professionals who like to move up ladder, who are seeking to develop network system security skills. Through four courses, we will cover the Design and Analyze Secure Networked Systems, Develop Secure Programs with Basic Cryptography and Crypto API, Hacking and Patching Web Applications, Perform Penetration Testing, and Secure Networked Systems with Firewall and IDS, which will prepare you to perform tasks as Cyber Security Engineer, IT Security Analyst, and Cyber Security Analyst. course 2 Basic Cryptography and Programming with Crypto API: About this course: In this MOOC, we will learn the basic concepts and principles of cryptography, apply basic cryptoanalysis to decrypt messages encrypted with mono-alphabetic substitution cipher, and discuss the strongest encryption technique of the one-time-pad and related quantum key distribution systems. We will also learn the efficient symmetric key cryptography algorithms for encrypting data, discuss the DES and AES standards, study the criteria for selecting AES standard, present the block cipher operating modes and discuss how they can prevent and detect the block swapping attacks, and examine how to defend against replay attacks. We will learn the Diffie-Hellman Symmetric Key Exchange Protocol to generate a symmetric key for two parties to communicate over insecure channel. We will learn the modular arithmetic and the Euler Totient Theorem to appreciate the RSA Asymmetric Crypto Algorithm, and use OpenSSL utility to realize the basic operations of RSA Crypto Algorithm. Armed with these knowledge, we learn how to use PHP Crypto API to write secure programs for encrypting and decrypting documents and for signing and verify documents. We then apply these techniques to enhance the registration process of a web site which ensures the account created is actually requested by the owner of the email account. Module 1 - Basic Cryptography In this module we learn the basic concepts and principles of crytography, introduce the basic concept of cryptoanalysis using mono-alphabetic substitution cipher as an example, and discuss the one-time-pad and quantum key distribution concepts. Learning Objectives • Compose secure program with Crypto API for encryption, authentication, and integrity checking • Understand terminologies of basic cryptography • Understand Kerchhoff Principle • Apply cryptoanalysis techniques on mono-alphabetic ciphers • Explain why one time pad is strongest and understand how quantum key can be distributed
Views: 237 intrigano
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: 8954 Digital Trends 47
Stream and block cipher Cryptography and Network security in HINDI.
 
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Install Android app - https://play.google.com/store/apps/details?id=com.shalik.patel.cprogrammingsolution https://www.facebook.com/HTD-hub-250593705388294/?ref=br_rs Twitter - https://twitter.com/PatelShalik Hey, friends, I upload the videos in this channel in Hindi for Engineering student of UPTU and other universities for computer science and IT (information technology) students. like share and subscribe my channel ====================================================== Install C Programming Solution Android app - https://play.google.com/store/apps/details?id=com.shalik.patel.cprogrammingsolution ====================================================== ====================================================== My Career Planning android app - https://play.google.com/store/apps/details?id=guide.mycareer.com.rec.mycareer ====================================================== ====================================================== My Android App for my College Library (An Official App Of College Library) - https://play.google.com/store/apps/details?id=jrv.library.rec.reclibrary ====================================================== How to use android application - https://www.youtube.com/watch?v=1hMZCvl-JxM ====================================================== Contact me on Facebook - https://www.facebook.com/HTD-hub-250593705388294/?ref=br_rs ====================================================== Follow me on twitter - https://twitter.com/PatelShalik ======================================================
The Beale Ciphers performance
 
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A short video providing a brief introduction to the Beale Ciphers and how to solve the type of cryptogram that was used to Thomas Jefferson Beale to hide his treasure.
Views: 4172 Noah Schaich