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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: 829329 SciShow
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: 1380499 Origins Explained
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: 515601 WatchMojo.com
10 Codes and Ciphers
 
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10 Codes and Ciphers ----------------------------------------------- Subscribe to study the hidden secrets of the strange, unexplained and the macabre. Discover wayward spirits, unsolved mysteries, grisly murders, macabre history, folklore and legends of old. Facebook : https://fb.com/taphtv Thank you for watching our videos :x
Ancient Codes and Hieroglyphs : Documentary on the Science of Secrets (Full Documentary)
 
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Encryption and Le Chiffre Indechiffrable : Documentary on the Science of Secrets (Full Documentary). . Ancient Codes and Hieroglyphs : Documentary on the Science of Secrets (Full Documentary). . A Short History of Cryptography - A Brief History of Cryptography. An Episode Of Simon Singh's Series On The History of Keeping Secrets follows the development of the Idea of Non Secret Encryption To Finding the . This video is a production of the Washington DC Chapter of the Internet Society (ISOC-DC produced and directed by Paul Brigner and .
Views: 2204 Cira Mose
A Short History of Cryptography - A Brief History of Cryptography
 
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A Short History of Cryptography - A Brief History of Cryptography
Views: 35307 fb
Vigenere Cipher 1
 
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Encrypt the message MAKE IT HAPPEN using the Vigenėre cipher and key word MATH.
Views: 171586 MathAfterMath
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: 73360 Udacity
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: 138703 Theoretically
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: 8762 Udacity
Codes and Ciphers - Polyalphabetic Ciphers
 
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Understanding polyaplhabetic ciphers
Views: 2884 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: 42587 Buzzy Martin
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: 61143 Secret Screening
Unsolved - The History and Mystery of the World’s Greatest Ciphers
 
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Craig Bauer, author of Unsolved Ciphers and editor of Cryptologia, will examine these and other vexing ciphers yet to be cracked. Some may reveal the identity of a spy or serial killer, provide the location of buried treasure, or expose a secret society—while others may be elaborate hoaxes. Guests are invited to stay after his talk for some collaborative cipher-breaking fun. ----------------------------------------------------------------- Facebook: https://www.facebook.com/IntlSpyMuseum Twitter: https://twitter.com/intlspymuseum SpyCast: https://audioboom.com/channel/spycast
Views: 12109 IntlSpyMuseum
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: 106086 Top Lists
CRYPTOLOGY - Cryptograms
 
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Today I talk about basic substitution ciphers. Please like, comment, and subscribe. Thanks for watching!
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: 238240 CrashCourse
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: 602904 Khan Academy
History of Cryptography
 
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Cryptography, the science of writing codes and ciphers for secure communication, is one of the most important elements that goes into making modern cryptocurrencies and blockchains possible. Subscribe to keep up to date with more content from Binance and don’t forget to check our other videos at www.binance.vision! ********************************** To learn more about Blockchain and Cryptocurrency visit Binance Academy: https://www.binance.vision To trade over 100 different cryptocurrencies visit Binance Exchange: https://www.binance.com *********************************** Binance Academy - Blockchain and Crypto Explained Twitter: https://www.twitter.com/binanceacademy Facebook: https://www.facebook.com/binanceacademy Website: https://www.binance.vision Binance Twitter: https://www.twitter.com/binance Facebook: https://www.facebook.com/binanceexchange Website: https://www.binance.com ***********************************
Views: 1368 Binance Academy
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: 11364 CuriosityShow
Most DIFFICULT Codes That Were Ever CRACKED!
 
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Check out the Most DIFFICULT Codes That Were Ever CRACKED! From breaking famous uncracked codes to some of the most mysterious ciphers finally solved using computer science, this top 10 list of incredible codes & ciphers that were finally figured out will amaze you! Follow us on instagram! https://www.instagram.com/katrinaexplained/ Subscribe For New Videos! http://goo.gl/UIzLeB Watch our "REAL Mermaid Sightings Around The World!" video here: https://youtu.be/ChM0CBRmVsM Watch our "Most Amazing Cities Found UNDERWATER!" video here: https://www.youtube.com/watch?v=rUqxhYJqGhU Watch our "Most EXPENSIVE Private Jets Owned By BILLIONAIRES!" video here: https://www.youtube.com/watch?v=nyqlXe3-jrA 10. The Zimmerman Telegram During times of war, messages are often sent in code to prevent the enemy from finding out about secret plans. Spies are everywhere, and if the message is ever decoded by an unintended recipient, it can change the course of history… and that’s exactly what happened in 1917. 9. The Battle of Midway The Battle of Midway, which took place between the 4th and 7th of June, 1942, was one of the American military’s biggest victories over the Japanese navy during the second world war. In this battle over 3,000 Japanese sailors lost their lives and 4 aircraft carriers were destroyed, while the Americans lost 300 sailors and one carrier. It could have all been different, though, had US cryptographers not intercepted and decoded Japanese transmissions. 8. The Babington Plot The Babington plot was an attempt, in 1586, to assassinate Queen Elizabeth the First, protestant daughter of King Henry VIII. The goal was to replace her on the throne with Mary Queen of Scots, who was her Roman Catholic cousin. On July 6th that year, Anthony Babington, encouraged by support from abroad (mostly Spain) wrote a long letter to Mary, who at the time was already in prison. 7. Olivier Levasseur According to legend, the notorious French Pirate, Olivier Levasseur, managed to acquire a huge fortune during his piracy across the Caribbean and West Africa- most notably in 1721 when he and his crew captured a Portuguese treasure ship that had become grounded on a sandbar during a storm- an act that is said to be one of the greatest paydays in the history of piracy. 6. Poe’s Challenge Edgar Allan Poe was a renowned writer and poet, known for his stories of mystery… but he was also fascinated with ciphers and codes. He even wrote a story, The Gold Bug, about the solution to one. In 1840, he wrote an article for Graham's magazine called ‘A Few Words on Secret Writing' in which he invited readers to send him coded messages for him to decipher. 5. Linear B In 1900, among the ruins of a Bronze age palace in Knossos, Greece, archaeologists found a script that resembled nothing that had ever been seen before. Containing images of swords, chariots, and countless other small pictograms, this system of writing became known as Linear B and would prove to be a mystery for the following 50 years. 4. Frank Sidebottom Frank Sidebottom was the papier-mâché headed comedy persona of English musician Chris Sievey. Throughout his career in the 80s and 90s, he fronted tv and radio shows and even reported for the local news. He created numerous newsletters and writings over this time, too, and these were often accompanied by symbols around them… ones that people long suspected had a meaning, but they couldn't work out what it was. 3. Chaocipher The Chaocipher was created by John Francis Byrne in 1918 and was what he described as being unbreakable… yet simple. So simple, in fact, that it only required two rotating discs that were small enough to fit into a cigar box and could be operated by a ten-year-old. He offered a cash reward to anyone who could crack it, but this is something that would never be claimed. 2. The Copiale Cipher Created in the 1730s, the Copiale cipher is a 105-page manuscript that has baffled researchers ever since…That is until 2011 when it was finally decoded. Consisting of 75,000 handwritten characters; including arrows, shapes, runes, math symbols, roman letters, and Greek letters… there were only two examples of plain text in the entire book. 1. The Enigma Code The Enigma was an enciphering machine used by the German armed forces during the second world war to send secure messages. Early on, Polish mathematicians had figured out how to read these messages, but once the Germans realized this, they began to change the cipher system daily, making it virtually impossible to decipher. 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: 19589 Origins Explained
Top 7 Secret Codes and Ciphers
 
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A video I created about some secret codes and ciphers that are used in order to protect sensitive information. Watch the video to learn more :-) It includes: Monoalphabetic Substitution, Vigenère, True Codes, The Enigma Code, Public-Key Cryptography, Steganography, ROT1, Transposition, Morse Code, Caesar Shift Cipher. Music: The Complex - Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/ Subscribe for more great stuff :-)
Views: 4232 dzvero007
Types of Ciphers
 
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Types of Ciphers
Views: 33721 Jungwoo Ryoo
The one-time pad | Journey into cryptography | Computer Science | Khan Academy
 
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The perfect cipher Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/frequency-stability?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/polyalphabetic-cipher?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Computer Science on Khan Academy: Learn select topics from computer science - algorithms (how we solve common problems in computer science and measure the efficiency of our solutions), cryptography (how we protect secret information), and information theory (how we encode and compress information). About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Computer Science channel: https://www.youtube.com/channel/UC8uHgAVBOy5h1fDsjQghWCw?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 425795 Khan Academy
What is Zodiac's 340-Character Cipher?  2018 ACA Presentation
 
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This is my talk given on September 8, 2018 at the annual convention of the American Cryptogram Association in Hendersonville, NC. In it I try to talk about all the things I've learned about the unsolved 340-character cipher sent by the notorious Zodiac Killer almost 50 years ago. Read more about the ciphers at http://zodiackillerciphers.com Follow me on twitter at https://twitter.com/doranchak
Views: 22248 David Oranchak
How To Write In Vigenère Cipher
 
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In this cipher tutorial, I show you how to write in Vigenère cipher. If this helped you to write in Vigenère code, please do remember to subscribe! If you want to practice your Vigenère cipher, here's a website that can help you out: http://pi.math.cornell.edu/~mec/2003-2004/cryptography/polyalpha/polyalpha.html 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
Views: 2358 Buzzy Martin
Math for Liberal Studies: Decoding a Message Using the Bifid Cipher
 
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In this video, we work through an example decoding a message using the bifid cipher. For more info, visit the Math for Liberal Studies homepage: http://webspace.ship.edu/jehamb/mls/index.html
Views: 16189 James Hamblin
Codes and Ciphers - Monoalphabetic Ciphers
 
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Understanding monoaplhabetic ciphers
Views: 1071 Chuck Moore
Ciphers, Codemakers & Codebreakers (National Treasure documentary)
 
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Excerpt from documentary made for the National Treasure DVD.
Views: 12249 Jill Demby Guest
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: 955 Samuel Chukwuemeka
Ep.18: Secret Codes and Ciphers
 
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Supercharged Science Cast Ep.18: Secret Codes and Ciphers http://www.superchargedsciencecast.com/download-worksheets/ The Date Shift cipher is a much harder code to break because the Date Shift number key varies from letter to letter, and also because it's polyalphabetic (this means that a number or letter can represent multiple letters). http://youtu.be/DzBosnNX6Is Download free worksheets at: http://www.superchargedsciencecast.com/
Views: 4172 Aurora Lipper
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: 4718 Simple Snippets
Vigenere Cipher - Decryption (Known Key)
 
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This video shows how to decrypt the ciphertext when the key is known. Decryption (unknown key): http://youtu.be/LaWp_Kq0cKs Encryption: http://youtu.be/izFivfLjD5E
Views: 29904 Theoretically
Vigenere Cipher - Encryption
 
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This video is about the Vigenere Cipher: years used, key format, encryption. Note: sorry, I may have mispronounced names. Decryption (known key): http://youtu.be/oHcJ4QLiiP8 Decryption (unknown key): http://youtu.be/LaWp_Kq0cKs
Views: 27767 Theoretically
How to Break Cryptography | Infinite Series
 
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Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/donateinfi Only 4 steps stand between you and the secrets hidden behind RSA cryptography. Find out how to crack the world’s most commonly used form of encryption. Tweet at us! @pbsinfinite Facebook: facebook.com/pbsinfinite series Email us! pbsinfiniteseries [at] gmail [dot] com Previous Episode: Can We Combine pi & e into a Rational Number? https://www.youtube.com/watch?v=bG7cCXqcJag&t=25s Links to other resources: Shor's paper: https://arxiv.org/abs/quant-ph/9508027v2 Lecture on Shor's Algorithm: https://arxiv.org/pdf/quant-ph/0010034.pdf Blog on Shor's algorithm: http://www.scottaaronson.com/blog/?p=208 Video on RSA cryptography: https://www.youtube.com/watch?v=wXB-V_Keiu8 Another video on RSA cryptography: https://www.youtube.com/watch?v=4zahvcJ9glg Euler's Big Idea: https://en.wikipedia.org/wiki/Euler%27s_theorem (I can find a non-wiki article, but I don't actually use this in the video. It's just where to learn more about the relevant math Euler did.) Written and Hosted by Kelsey Houston-Edwards Produced by Rusty Ward Graphics by Ray Lux Made by Kornhaber Brown (www.kornhaberbrown.com) Challenge Winner - Reddles37 https://www.youtube.com/watch?v=bG7cCXqcJag&lc=z135cnmgxlbwch1ds233sbzgaojkivaz004 Comments answered by Kelsey: Joel David Hamkins https://www.youtube.com/watch?v=bG7cCXqcJag&lc=z13zdpcwyk2ofhugh04cdh4agsr2whmbsmk0k PCreeper394 https://www.youtube.com/watch?v=bG7cCXqcJag&lc=z135w324kw21j1qi104cdzvrpoixslmq1jw
Views: 196530 PBS Infinite Series
Affine Cipher Part 1 - Encryption
 
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Hi guys, in this video we look at the encryption process behind the affine cipher
Views: 24178 Sam Cogan
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: 6279 Simple Snippets
Public Key Cryptography - Computerphile
 
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Spies used to meet in the park to exchange code words, now things have moved on - Robert Miles explains the principle of Public/Private Key Cryptography note1: Yes, it should have been 'Obi Wan' not 'Obi One' :) note2: The string of 'garbage' text in the two examples should have been different to illustrate more clearly that there are two different systems in use. http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels
Views: 446340 Computerphile
Symmetric Key Cryptography: The Rail Fence Cipher
 
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This is the third in a series about cryptography; an extremely important aspect of computer science and cyber security. It covers a transposition cipher called the rail fence cipher, also known as the zig zag cipher. It explains how this method can be used to scramble the letters in a plain text message to generate cipher text. It also explains how the rail fence cipher can be used with different keys. The video includes a examples you can try to encrypt and decrypt yourself.
Views: 650 Computer Science
Message Authentication Code MAC Part 1 | IIT Lecture Series
 
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In cryptography, a message authentication code (MAC), sometimes known as a tag, is a short piece of information used to authenticate a message—in other words, to confirm that the message came from the stated sender (its authenticity) and has not been changed. The MAC value protects both a message's data integrity as well as its authenticity, by allowing verifiers (who also possess the secret key) to detect any changes to the message content.
Views: 6707 CSE Technical Videos
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: 39585 MathAfterMath
Fishy Codes: Bletchley's Other Secret - Computerphile
 
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Hitler's High Command didn't use Enigma, they used a faster system called Lorenz, but when Allied forces first encountered it, they had no idea what it was and code-named it 'Tunny' (Tuna). Professor Brailsford explains why this relates to the early days of Computer Science Next Video in this series: https://youtu.be/yxx3Bkmv3ck The Professor's Notes: Undulator Sheet: http://bit.ly/computerphileundulator Teleprinter Code: http://bit.ly/computerphile5holetape Colossus & Bletchley Park: https://youtu.be/9HH-asvLAj4 Enigma Playlist: https://www.youtube.com/playlist?list... 5 Hole Paper Tape: https://youtu.be/JafQYA7vV6s XOR and the Half Adder: https://youtu.be/VPw9vPN-3ac JPEG DCT: https://youtu.be/Q2aEzeMDHMA Computer That Changed Everything: https://youtu.be/6LYRgrqJgDc Inside the Computer (EDSAC): https://youtu.be/Yc945sNB0uA http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 140126 Computerphile
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: 71431 Brian R
The Isisian Codes - Acroamatic Ciphers
 
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Originally recorded in Dec, 2009, Intro to Acroamatic Cryptograms introduces the idea of "a sacred Alphabet" encoded into mythology as hinted at by Manley P. Hall, who commented on the concept in a chapter called "The Cryptogram as a Factor in Symbolic Mythology". Graphics help bring the original content into a clearer perspective. This was Podcast 2, Segment 2 in the original series.
Views: 893 Dennis Fetcho
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: 140806 David Oranchak
Cryptography - Breaking the Vigenere Cipher
 
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In this video I go over how to use my Vigenere frequency tool to figure out the keyword used to encrypt a message using the Vigenere Cipher. **This video will not explain why certain columns have marks under the keysize. That is shown in another video. All my encryption links are at http://www.brianveitch.com/maze-runner/
Views: 32055 Brian Veitch
SciStory (Episode 01) : Cryptology - Polybius Square Cipher by Muhaiminul Islam Antik
 
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This is the first episode of SciStory which focuses on Polybius Square Cipher, a very easy step towards Cryptology. This is just the beginning. InshaAllah we'll provide you with new videos on Cryptology at regular intervals. Don't forget to subscribe our channel. Thank you.
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: 4220 Noah Schaich
The History of Cryptography: Block Cyphers, Stream Cyphers, Public Keys and more!
 
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Alice and Bob have secrets they want to talk about without Eve being able to listen in. Worse yet, the mischievous Mallory delights in changing messages sent between parties. In such a hostile environment how can Alice talk to Bob without their messages being overheard and how can she be sure that it was Bob that sent the message in the first place? This talk will take a brief look at historic codes and ciphers before taking a look at modern day Cryptography. If you want to be able to know the difference between a block cipher and a stream cipher or get a glimpse into the mathematics behind public key Cryptography this talk is for you. Talk given by Chris Riley at PHP UK Conference 2018. The talk is under the creative commons license. freeCodeCamp is not associated with this talk but we are excited to share it with a wider audience. -- Learn to code for free and get a developer job: https://www.freecodecamp.org Read hundreds of articles on programming: https://medium.freecodecamp.org And subscribe for new videos on technology every day: https://youtube.com/subscription_center?add_user=freecodecamp
Views: 4531 freeCodeCamp.org