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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: 785952 SciShow
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: 126758 Ryan Kral
Types of Ciphers
 
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Types of Ciphers
Views: 30171 Jungwoo Ryoo
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: 58199 Pico Cetef
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: 511897 WatchMojo.com
Null Cipher Code
 
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Deane shows how to use a simple code to send secret messages. SUBSCRIBE NOW http://www.youtube.com/subscription_center?add_user=CuriosityShow CONNECT WITH CURIOSITY Facebook ➤ http://www.facebook.com/CuriosityShow Twitter ➤ https://twitter.com/CuriosityShow Curiosity Show ➤ www.curiosityshow.com.au
Views: 10068 CuriosityShow
10 Unsolved Codes That No One Can Crack
 
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Given enough time, experts can generally crack ciphers. However, every once in a while, a code comes along that no one is able to solve despite decades of study. Are they hoaxes, or are they really just that good? These are 10 codes that no one can crack. SUBSCRIBE to Top Lists: http://bit.ly/1L6oSup 10 Things You Didn't Know About Germany - http://bit.ly/1VZVy2J 10 Things You Didn't Know About China - http://bit.ly/2194oet 5 Real Secret Societies That Control The World - http://bit.ly/1V35S9O ------------------------------------------------------------------------------------------------- Like us on Facebook: http://on.fb.me/1KFduoO 10 Unsolved Codes No One Can Crack
Views: 103420 Top Lists
Famous UNCRACKED Codes That STILL Exist!
 
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Check out these famous uncracked codes that still exist! From secret riddles to unsolved mysteries, this top 10 list contains cryptography that's still unexplained today! Subscribe For New Videos! http://goo.gl/UIzLeB Watch our "Most CRAZY Things Ancient Egyptians Did!" video here: https://youtu.be/T0zERiMJFQo Watch our "Most CRAZY Things Ancient Greeks Did!" video here: https://youtu.be/-JkhVvn_dow Watch our "REAL Evidence That Aliens EXIST!" video here: https://youtu.be/dtwJT2eilx0 10. Chinese Gold Bar Cipher In 1933, General Wang in Shanghai, China, allegedly received seven gold bars. These gold bars appear to represent metal certificates related to a bank deposit with a U.S. Bank. The gold bars themselves have pictures, Chinese writing, some form of script writing, and cryptograms in Latin letters. Not surprisingly, experts debate concerning the validity of the claim for the deposit. It may help to resolve the dispute if someone can decipher the cryptograms on the bars. Someone translated the Chinese writing, which discusses a transaction in excess of $300,000,000. It also refers to these gold bars, which weigh a total of 1.8 kilograms. The rest remains a mystery. 9. D’agapeyeff Cipher The D’Agapeyeff cipher is an as-yet unbroken cipher that appears in the first edition of Codes and Ciphers, an elementary book on cryptography published by the Russian-born English cartographer Alexander D’Agapeyeff in 1939. Offered as a “challenge cipher” at the end of the book, it was not included in later editions. D’Agapeyeff supposedly admitted later to having forgotten how he had encrypted it. Some argue that the failure of all attempts at decryption is due to D’Agapeyeff incorrectly encrypting the original text. However, it has also been argued that the cipher may still be successfully attacked using computational methods such as genetic algorithms. Whatever those are. 8. The Beale Ciphers If this next one isn’t a hoax then the person who solves it could become very, very rich. This question of authenticity has bothered cryptoanalysts ever since these ciphers first appeared in an 1885 pamphlet called The Beale Papers, which recounts a fantastic story of buried treasure. According to the pamphlet, a man named Thomas Jefferson Beale, a man no one has proven even existed, discovered gold during an 1816 expedition into the American West. The treasure, as the story goes, was then transported to Bedford County, Virginia, and buried. The gold's secret location was allegedly provided by three cryptograms, of which one was already cracked. Unfortunately, the cracked code only detailed the type of treasure there and not a specific location. To find out anything more specific would involve cracking the two other ciphers. The problem is that figuring it out requires comparing them to unknown historical texts. The decrypted cipher, for example, used the Declaration of Independence. The first number, 115, corresponds with the first letter of the 115th word in the Declaration: "instituted." That means 115 stands for "I." So what are the translation texts for the other two ciphers? No one knows, and they may very well not exist at all. There are also questions over whether the other ciphers may just be unintelligible, as if the whole thing was made up by the pamphlet's author decades after the gold was supposed to have been discovered. 7. Dorabella In 1897, a 40-year-old composer named Edward Elgar sent an encrypted letter to 23-year-old Dora Penny, the stepdaughter of one of his friends. Why he sent it is part of the mystery and can only be answered if anyone ever cracks the code. To figure it out would involve deciphering 87 characters all made of strings of semi-circles oriented in different directions. Attempts at translating the cipher yielded a message just short of gibberish. Experts say that shorter ciphers are always harder to solve. Another theory has it that the code is an example of a distinct private language shared only between Penny and Elgar. If that's the case, then solving it may be simply impossible, since no one but them would understand the references. In 2016, a police officer in Cleveland believes he’s cracked at least part of the code, revealing a line of melody. Inspector Mark Pitt read 100 books on the Dorabella Cipher; he hopes to write one on his discoveries. Whether or not that’s really the meaning, though, remains to be seen. Origins Explained is the place to be to find all the answers to your questions, from mysterious events and unsolved mysteries to everything there is to know about the world and its amazing animals!
Views: 1088503 Origins Explained
How To Decode A Message With An ATBASH Cipher [CODE CRACKING 101]
 
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http://royalorderoftheholymackerel.com/ WANT TO JOIN THE SOCIETY? CLICK THE LINK BELOW! http://royalorderoftheholymackerel.com/new_members/ DOWNLOAD AND PRINT YOUR FREE ATBASH CIPHER DISK! https://drive.google.com/file/d/0B9b4jkHYFD5AeTdwY2FyTVU1OUk/edit?usp=sharing DOWNLOAD AND PRINT YOUR FREE DECODER DISK #3! https://drive.google.com/file/d/0B9b4jkHYFD5AanB5Q08tbklYMTQ/edit?usp=sharing DOWNLOAD AND PRINT YOUR FREE "THREE LETTERS BACK" CAESAR CIPHER! https://drive.google.com/file/d/0B9b4jkHYFD5AWjBNUnZVX3JuYmM/edit?usp=sharing SUPPORT THE SHOW AND UNLOCK COOL BONUS CONTENT ON PATREON! http://www.patreon.com/RoyalOrderoftheHolyMackerel MEMBERSHIP KITS, INVISIBLE INK PENS, MEMBER'S JOURNAL BINDERS, AND DECODER RINGS ARE NOW AVAILABLE IN THE STORES!! http://roothm.storenvy.com/ http://www.zazzle.com/roothm JOIN THE FISHERS OF TRUTH NEWSLETTER http://eepurl.com/TXpbn SUBSCRIBE TO THE PODCAST ON iTUNES https://itunes.apple.com/us/podcast/royal-order-holy-mackerel/id855579169 OUR PREVIOUS MEETING http://youtu.be/NpmXQV6q9Ug ------------------ Welcome to Code Cracking 101! In this episode I explain how to use an ATBASH cipher to decode the secret messages hidden in episodes 7 - 13 (and beyond) of Gravity Falls. ------------------ SEND LETTERS, FAN MAIL, AND POSTCARDS TO Douglas MacKrell P.O.Box 6529 Astoria, NY 11106 SEND EMAILS TO [email protected] JOIN THE SOCIETY Website http://royalorderoftheholymackerel.com/ Facebook https://www.facebook.com/theroyalorderoftheholymackerel Twitter https://twitter.com/DouglasMacKrell Tumblr http://theroyalorderoftheholymackerel.tumblr.com/ Instagram http://instagram.com/douglasmackrell G+ https://www.google.com/+BigMacKrell ----------------- MORE INFORMATION ON GRAVITY FALLS http://disneychannel.disney.com/gravity-falls http://en.wikipedia.org/wiki/Gravity_Falls http://gravityfalls.wikia.com/wiki/Gravity_Falls_Wiki MORE INFORMATION ABOUT THE ATBASH CIPHER http://en.wikipedia.org/wiki/Atbash Cipher Challenge: Atbash cipher http://youtu.be/EksD3QHkkRE atbash http://youtu.be/t4Z0eVVZDPk The Hidden Meaning of END OF THE WORLD http://youtu.be/W96lFus0JRo ------------- In this meeting of Code Cracking 101, I break down the Atbash Cipher. The ATBASH cipher actually got it's start in Hebrew text - notably in Jewish Mysticism, as it's used in translations of their religious books. The name itself is is actually an acronym of four Hebrew letters: Aleph-Tav-Beth-Shin (אתבש). The way the Atbash Cipher works is by mirroring the alphabet. By writing A to Z on a piece of paper and Z to A just below it, you've crafted an Atbash Cipher! This means that if you decode one letter B=Y, you've decoded the reverse as well Y=B. Due to the low difficulty of this encryption method, it's not often used in situations where data must remain secure - but it does make a great way to casually encode messages between friends! http://wp.me/a4aWg3-8H
Views: 55463 Secret Screening
Top 10 Unbreakable Ciphers and Codes — TopTenzNet
 
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Top 10 Unbreakable Ciphers and Codes →Subscribe for new videos every day! http://bit.ly/toptenzsubscribe →10 Reasons Bruce Lee was a Superhuman: http://bit.ly/1Hl4mVu Entertaining and educational top 10 lists from TopTenzNet! Brand new videos 7 days a week! Videos are published at 6pm EST every day! Other TopTenz Videos: Top 10 Historical Unsolved Mysteries http://bit.ly/1RAAE95 In an age where we have satellites that can zoom in to watch an ant pee on a leaf, you’d think our society pretty much knows everything. Even with our high-speed, touchscreen, 3-D, Star Wars projectors, there are still a few ciphers and codes keeping cryptologists (trust us, it’s a word) stumped. Some of them come from way back in the 18th century. Even with the addition of advanced technology, ye ol’ pilgrims are proving that the smartest thing about our society might just be our phones. Text version: http://www.toptenz.net/top-10-unbreakable-ciphers-codes.php Coming up: 10. Dorabella Cipher 9. D’Agapeyeff Cipher 8. Indus Script 7. Chinese Gold Bar Ciphers 6. Zodiac Killer 5. Linear A 4. Proto-Elamite 3. Taman Shud 2. McCormick Cipher 1. Bacon Cipher Source/Other reading: http://www.ciphermysteries.com/the-dorabella-cipher http://nautil.us/issue/6/secret-codes/the-artist-of-the-unbreakable-code http://www.ciphermysteries.com/2013/12/23/dagapeyeff-cipher http://itknowledgeexchange.techtarget.com/security-corner/the-unsolved-dagapeyeff-cipher/ http://www.harappa.com/script/indusscript.pdf http://elonka.com/UnsolvedCodes.html http://books.google.com/books?id=G4gCs-RmVZwC&pg=PA46&lpg=PA46&dq=General+Wang+unsolved+gold+bars&source=bl&ots=vrfYkpCHEz&sig=gwWoVvcHk5qecMsXwuLVmZoYKZU&hl=en&sa=X&ei=XU9_U-HGOtelyATduYDYDg&ved=0CHsQ6AEwBQ#v=onepage&q=General%20Wang%20unsolved%20gold%20bars&f=false http://listverse.com/2007/10/01/top-10-uncracked-codes/ http://www.crimelibrary.com/serial_killers/notorious/zodiac/8.html http://www.zodiologists.com/ http://mysteries24.com/n4-21061-Unsolved_coded_messages http://www.cam.ac.uk/research/news/cracking-the-code-the-decipherment-of-linear-b-60-years-on http://www.ancientscripts.com/elamite.html http://www.historytoday.com/mark-ronan/puzzle-proto-elamite http://www.heraldsun.com.au/news/law-order/portrait-may-hold-key-to-somerton-man-beach-mystery/story-fni0ffnk-1226674957043 http://www.ciphermysteries.com/2009/08/08/the-tamam-shud-cipher-mystery http://www.fbi.gov/news/stories/2011/march/cryptanalysis_032911/cryptanalysis_032911 http://www.riverfronttimes.com/2012-06-14/news/ricky-mccormick-code-mysterious-death-st-louis/ http://www.jstor.org/discover/10.2307/751135?uid=3739256&uid=2129&uid=2&uid=70&uid=4&sid=21103794245461 http://www.bibliotecapleyades.net/ciencia/esp_ciencia_manuscrito06.htm
Views: 85571 TopTenz
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: 129925 Lacey Wright
How To Write in Atbash Cipher
 
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In this tutorial, I teach you how to write in atbash cipher code. If you guys enjoyed this atbash cipher tutorial, please do remember to subscribe :) Support the channel and buy some original art or signed prints here, on my website: https://www.buzzymartin.co.uk Follow me on instagram: https://www.instagram.com/buzzymartin ...and here you can encode things into Atbash Cipher: http://www.hanginghyena.com/solvers/atbash-cipher-decoder
Views: 5400 Buzzy Martin
Vigenere Cipher 1
 
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Encrypt the message MAKE IT HAPPEN using the Vigenėre cipher and key word MATH.
Views: 141318 MathAfterMath
Cryptography: Codes, Ciphers, and Connections
 
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The encryption of information is as old as information itself. Ever since two people wanted to pass something along, so has there been a third party who wanted to be privy to it. This back and forth battle of creating codes, breaking them, and finding new ones has been happening quietly for thousands of years. Now, in an age when information flows freely and instantaneously, the field of cryptography is more important than ever. 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
Symmetric Key and Public Key Encryption
 
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Modern day encryption is performed in two different ways. Check out http://YouTube.com/ITFreeTraining or http://itfreetraining.com for more of our always free training videos. Using the same key or using a pair of keys called the public and private keys. This video looks at how these systems work and how they can be used together to perform encryption. Download the PDF handout http://itfreetraining.com/Handouts/Ce... Encryption Types Encryption is the process of scrambling data so it cannot be read without a decryption key. Encryption prevents data being read by a 3rd party if it is intercepted by a 3rd party. The two encryption methods that are used today are symmetric and public key encryption. Symmetric Key Symmetric key encryption uses the same key to encrypt data as decrypt data. This is generally quite fast when compared with public key encryption. In order to protect the data, the key needs to be secured. If a 3rd party was able to gain access to the key, they could decrypt any data that was encrypt with that data. For this reason, a secure channel is required to transfer the key if you need to transfer data between two points. For example, if you encrypted data on a CD and mail it to another party, the key must also be transferred to the second party so that they can decrypt the data. This is often done using e-mail or the telephone. In a lot of cases, sending the data using one method and the key using another method is enough to protect the data as an attacker would need to get both in order to decrypt the data. Public Key Encryption This method of encryption uses two keys. One key is used to encrypt data and the other key is used to decrypt data. The advantage of this is that the public key can be downloaded by anyone. Anyone with the public key can encrypt data that can only be decrypted using a private key. This means the public key does not need to be secured. The private key does need to be keep in a safe place. The advantage of using such a system is the private key is not required by the other party to perform encryption. Since the private key does not need to be transferred to the second party there is no risk of the private key being intercepted by a 3rd party. Public Key encryption is slower when compared with symmetric key so it is not always suitable for every application. The math used is complex but to put it simply it uses the modulus or remainder operator. For example, if you wanted to solve X mod 5 = 2, the possible solutions would be 2, 7, 12 and so on. The private key provides additional information which allows the problem to be solved easily. The math is more complex and uses much larger numbers than this but basically public and private key encryption rely on the modulus operator to work. Combing The Two There are two reasons you want to combine the two. The first is that often communication will be broken into two steps. Key exchange and data exchange. For key exchange, to protect the key used in data exchange it is often encrypted using public key encryption. Although slower than symmetric key encryption, this method ensures the key cannot accessed by a 3rd party while being transferred. Since the key has been transferred using a secure channel, a symmetric key can be used for data exchange. In some cases, data exchange may be done using public key encryption. If this is the case, often the data exchange will be done using a small key size to reduce the processing time. The second reason that both may be used is when a symmetric key is used and the key needs to be provided to multiple users. For example, if you are using encryption file system (EFS) this allows multiple users to access the same file, which includes recovery users. In order to make this possible, multiple copies of the same key are stored in the file and protected from being read by encrypting it with the public key of each user that requires access. References "Public-key cryptography" http://en.wikipedia.org/wiki/Public-k... "Encryption" http://en.wikipedia.org/wiki/Encryption
Views: 451835 itfreetraining
NETWORK SECURITY - TYPES OF AUTHENTICATION (Message Encryption, MAC, Hash Functions)
 
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Three types of Authentications 1. Message Encryption 2. Message Authentication Code 3. Hash Functions.
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
Polyalphabetic cipher | Journey into cryptography | Computer Science | Khan Academy
 
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Brit introduces the polyalphabetic cipher, which creates a lighter fingerprint than the Caesar cipher. Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/one-time-pad?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/caesar-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: 430806 Khan Academy
Can You Solve These ' Code Cracker' Mystery Riddles??? + LEARN A SECRET LANGUAGE!!!
 
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Here are 3 code cracking puzzles [ riddles]. Try solving them with the given clues!!! In this video i'll also be showing you how to code and decode in a special language called the 'caesars box' or the 'caesars cipher' Try it and show it to your friends!!! ⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣⇣ And please make sure you subscribe and share it!! ⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡⇡ Weekly uploads!!! Don't miss them subscribe!!! SONG- Vanilla by MELURAN https://soundcloud.com/meluran Creative Commons — Attribution 3.0 Unported— CC BY 3.0 http://creativecommons.org/licenses/b... Music provided by Audio Library https://youtu.be/gOBw5e8WwgU Thanx for watching and have a good day!! -planetworm.
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: 590931 Khan Academy
Codes and Ciphers - Polyalphabetic Ciphers
 
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Understanding polyaplhabetic ciphers
Views: 1979 Chuck Moore
How To Write in Pigpen Cipher [2 MINUTE TUTORIAL]
 
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Pigpen cipher - also known as masonic cipher, Freemason's cipher, Napoleon cipher, and tic-tac-toe cipher - is a geometric substitution cipher based off of 4 grids. If you enjoyed this pigpen cipher tutorial, please do remember to subscribe - it really helps me out. Buy my artwork / check out my website here: https://www.buzzymartin.co.uk Follow me on instagram: https://www.instagram.com/buzzymartin
Views: 25129 Buzzy Martin
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: 42240 Udacity
PlayFair Cipher in Hindi – Complete Algorithm with Example
 
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PlayFair Cipher in Hindi – Complete Algorithm with Example Like FB Page - https://www.facebook.com/Easy-Engineering-Classes-346838485669475/ Complete Data Structure Videos - https://www.youtube.com/playlist?list=PLV8vIYTIdSna11Vc54-abg33JtVZiiMfg Complete Java Programming Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbL_fSaqiYpPh-KwNCavjIr Previous Years Solved Questions of Java - https://www.youtube.com/playlist?list=PLV8vIYTIdSnajIVnIOOJTNdLT-TqiOjUu Complete DBMS Video Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnYZjtUDQ5-9siMc2d8YeoB4 Previous Year Solved DBMS Questions - https://www.youtube.com/playlist?list=PLV8vIYTIdSnaPiMXU2bmuo3SWjNUykbg6 SQL Programming Tutorials - https://www.youtube.com/playlist?list=PLV8vIYTIdSnb7av5opUF2p3Xv9CLwOfbq PL-SQL Programming Tutorials - https://www.youtube.com/playlist?list=PLV8vIYTIdSnadFpRMvtA260-3-jkIDFaG Control System Complete Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbvRNepz74GGafF-777qYw4
Pig Pen Code
 
07:57
Pig pen code - Showing how to cipher pig pen code
Views: 17040 4aRainyDay
Symmetric Encryption & Caesar Cipher: Cryptography and Network Security - Unacademy GATE(CSE)
 
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This lesson explains the Symmetric Encryption & Caesar Cipher, under the course, "Cryptography and Network Security for GATE". The lesson explains the following subtopics: Symmetric Encryption Substitution Techniques Transposition Techniques Caesar Cipher 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 Symmetric Encryption & Caesar Cipher: Cryptography and Network Security - Unacademy GATE(CSE)
Affine Cipher Encryption
 
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gcd: https://www.youtube.com/watch?feature=player_detailpage&v=WA4nP-iPYKE Decryption: http://youtu.be/XFxFPBKFVe8
Views: 22473 Theoretically
Block Cipher Modes of Operation (CSS441, L06, Y15)
 
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Modes of operation for block ciphers, introducing ECB, CBC and Counter mode. Course material via: http://sandilands.info/sgordon/teaching
Views: 21011 Steven Gordon
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: 130169 David Oranchak
Vigenere Cipher - Decryption (Unknown Key)
 
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This video shows the process (thoroughly) of how to find the key when you don't have it. English alphabet frequencies: http://www.math.cornell.edu/~mec/2003-2004/cryptography/subs/frequencies.html Decryption (known key): http://youtu.be/oHcJ4QLiiP8 Encryption: http://youtu.be/izFivfLjD5E
Views: 117284 Theoretically
Ciphers, Codemakers & Codebreakers (National Treasure documentary)
 
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Excerpt from documentary made for the National Treasure DVD.
Views: 11131 Jill Demby Guest
Cryptography: Transposition Cipher
 
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This lesson explains how to encrypt and decrypt a message using a transposition cipher. Site: http://mathispower4u.com
Views: 57038 Mathispower4u
Vigenere Cipher : Type of Encryption Decryption Method | Poly-alphabetic Substitution Cryptography
 
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Vigenere Cipher With Example : Type of Encryption Decryption Method | Poly-alphabetic Substitution Cryptography. Visit Our Channel :- https://www.youtube.com/channel/UCxikHwpro-DB02ix-NovvtQ In this lecture we have taught about what how to solve vigenere cipher method. Follow Smit Kadvani on :- Facebook :- https://www.facebook.com/smit.kadvani Instagram :- https://www.instagram.com/the_smit0507 Follow Dhruvan Tanna on :- Facebook :- https://www.facebook.com/dhruvan.tanna1 Instagram :- https://www.instagram.com/dhru1_tanna Follow Keyur Thakkar on :- Facebook :- https://www.facebook.com/keyur.thakka... Instagram :- https://www.instagram.com/keyur_1982 Snapchat :- keyur1610 Follow Ankit Soni on:- Facebook :- https://www.facebook.com/ankitsoni.1511 Instagram :- https://www.instagram.com/ankit_soni1511
Views: 15039 Quick Trixx
Transposition Ciphers - Encryption/Decryption
 
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A beginner's guide to Transposition Ciphers (Encryption/Decryption).
Views: 75588 Daniel Rees
Caesar Cipher
 
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Fill in the table using the Caesar cipher. (a) Encrypt the message ATTACK AT DAWN using the Caesar cipher. (b) Decrypt the message WKLV LV IXQ using the Caesar cipher.
Views: 35458 MathAfterMath
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.
Types of Ciphers Part 2
 
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Types of Ciphers Part 2
Views: 2122 Jungwoo Ryoo
Lorenz: Hitler's "Unbreakable" Cipher Machine
 
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Many people have heard of Enigma before, the code machine used by Nazi Germany to send secret coded messages. Yet, some very clever code breakers were able to break that code and read those messages! But there was another cipher machine used by the Germans in WWII called the Lorenz machine, and this machine was even more difficult than Enigma, and was used by the top level of the Nazi Party. However the code breakers at Bletchley Park broke this code too, and could read secret messages from people like Adolf Hitler himself! It was mathematician Bill Tutte who discovered the breakthrough that allowed the Lorenz code to be broken. On the 10th of September 2014 a new memorial to Bill Tutte is unveiled in his hometown of Newmarket. Have a look at the Bill Tutte Memorial website at http://billtuttememorial.org.uk/
Views: 115703 singingbanana
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: 169044 Kenny Luminko
EPISODE 5 BACONIAN CIPHER
 
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Thanks for watching this week's video! Hope this video has sparked your interest in cryptography! Stay tune for more videos about cryptology :) Proudly brought to you by a group of RVHS students.
Views: 2764 Ng Jing Lin Julia
Auto Key Cipher : Type of Encryption Decryption Method | Poly-alphabetic Substitution Cryptography
 
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Auto Key Cipher With Example : Type of Encryption Decryption Method | Poly-alphabetic Substitution Cryptography. Visit Our Channel :- https://www.youtube.com/channel/UCxikHwpro-DB02ix-NovvtQ In this lecture we have taught about what how to solve auto key cipher method. Follow Smit Kadvani on :- Facebook :- https://www.facebook.com/smit.kadvani Instagram :- https://www.instagram.com/the_smit0507 Follow Dhruvan Tanna on :- Facebook :- https://www.facebook.com/dhruvan.tanna1 Instagram :- https://www.instagram.com/dhru1_tanna Follow Keyur Thakkar on :- Facebook :- https://www.facebook.com/keyur.thakka... Instagram :- https://www.instagram.com/keyur_1982 Snapchat :- keyur1610 Follow Ankit Soni on:- Facebook :- https://www.facebook.com/ankitsoni.1511 Instagram :- https://www.instagram.com/ankit_soni1511
Views: 10217 Quick Trixx
How to use the Vigenère Cipher
 
04:01
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
NETWORK SECURITY - SUBSTITUTION TECHNIQUES
 
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Substitution Techniques Here the Plain Text Letters are replaced with Cipher Text Characters 1) Caesar Cipher 2) Play Fair Cipher
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: 447803 World Science Festival
Asymmetric encryption - Simply explained
 
04:40
How does public-key cryptography work? What is a private key and a public key? Why is asymmetric encryption different from symmetric encryption? I'll explain all of these in plain English! 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
Electronic Code Book(ECB) | Algorithm Modes in Cryptography
 
05:36
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: 1198 Simple Snippets
How to Use the Caesar (Shift) Cipher
 
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This video explains how to use my online shift cipher tool.
Views: 10150 Brian Veitch

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