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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: 34274 fb
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: 811634 SciShow
History of Cryptography
 
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Brief History of Cryptography
Views: 9691 shaan1111
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: 216076 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: 597694 Khan Academy
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: 1664 Cira Mose
What is cryptography? | Journey into cryptography | Computer Science | Khan Academy
 
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What is Cryptography? A story which takes us from Caesar to Claude Shannon. Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/caesar-cipher?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/algorithms/intro-to-algorithms/v/what-are-algorithms?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: 792892 Khan Academy
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: 10517 IntlSpyMuseum
Ciphers, Codemakers & Codebreakers (National Treasure documentary)
 
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Excerpt from documentary made for the National Treasure DVD.
Views: 11946 Jill Demby Guest
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: 1250329 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: 513914 WatchMojo.com
Keeping Secrets: Cryptography In A Connected World
 
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Josh Zepps, Simon Singh, Orr Dunkelman, Tal Rabin, and Brian Snow discuss how, since the earliest days of communication, clever minds have devised methods for enciphering messages to shield them from prying eyes. Today, cryptography has moved beyond the realm of dilettantes and soldiers to become a sophisticated scientific art—combining mathematics, physics, computer science, and electrical engineering. It not only protects messages, but it also safeguards our privacy. From email to banking transactions, modern cryptography is used everywhere. But does it really protect us? What took place was a discussion of cryptography’s far-reaching influence throughout history from Julius Caesar’s reign to Julian Assange’s WikiLeaks, and the ways in which it—and our privacy—are constantly under assault today as threats lurk behind IP addresses, computational power increases, and our secrets move online. 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 Original Program Date: June 4, 2011 MODERATOR: Josh Zepps PARTICIPANTS: Orr Dunkelman, Tal Rabin, Simon Singh, Brian Snow Cryptography In A Connected World 00:12 Josh Zepps Introduction 01:33 Participant Introductions 02:30 What is the history of Cryptography? 04:52 What's the difference between Cryptography and Encryption? 06:56 How the enigma machine works. 12:09 You’re Only as Secure as Your Weakest Link 19:18 Public key and private key encryption example. 22:09 What is the distinction between hacking and cryptanalysis? 26:55 The NSA and what they are looking for? 28:25 How do we establish cyber security? 36:20 How do systems get broken into? 45:30 How do you break a code? 56:38 Public key and the key distribution problem. 01:03:04 Codes will need to be tough due to mathematicians getting better. 01:08:15 The cloud and how we protect it. 01:09:22 In a world that is increasingly networked, How do we protect ourselves? 01:14:30 Online voting ... When and how? 01:20:52
Views: 66887 World Science Festival
Asymmetric encryption - Simply explained
 
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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
What is Modular Arithmetic - Introduction to Modular Arithmetic - Cryptography - Lesson 2
 
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Modular Arithmetic is a fundamental component of cryptography. In this video, I explain the basics of modular arithmetic with a few simple examples. Learn Math Tutorials Bookstore http://amzn.to/1HdY8vm Donate - http://bit.ly/19AHMvX STILL NEED MORE HELP? Connect one-on-one with a Math Tutor. Click the link below: https://trk.justanswer.com/aff_c?offer_id=2&aff_id=8012&url_id=232 :)
Views: 157228 Learn Math Tutorials
Cryptography Basics: Definitions, History & Attacks (Cryptography Crashcourse Part 1)
 
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Book: Understanding Cryptography https://www.amazon.com/Understanding-Cryptography-Textbook-Students-Practitioners/dp/3642041000/ref=as_li_ss_tl?ie=UTF8&qid=1541146284&sr=8-1&keywords=Understanding+Cryptography:+A+Textbook+for+Students+and+Practitioners&linkCode=sl1&tag=julianhosp-20&linkId=8e14aad9056003d3eefcacb57c2e0b73&language=en_US ---------- New to cryptocurrencies? You might want to read this book first! http://cryptofit.community/cryptobook If you liked the video, subscribe to my channel, give a "thumbs up" and share this video to make the world together #cryptofit :) ► Subscribe: https://www.youtube.com/channel/UCseN... ► Cryptocurrency Exchange: https://www.binance.com/?ref=11272739 ► Hardware Wallet: http://www.julianhosp.com/hardwallet ► Ruben's Trinkgeld Adressen: Bitcoin: 3MNWaot64Fr1gRGxv4YzHCKAcoYTLXKxbc Litecoin: MTaGwg5EhKooonoVjDktroiLqQF6Rvn8uE --------------- ► Completely NEW? What is Blockchain, Bitcoin and Co? Get this book from me: https://www.amazon.com/Cryptocurrenci... ► Join our Facebook group: https://www.facebook.com/groups/crypt... ► iTunes Podcast: https://itunes.apple.com/sg/podcast/t... ► My website: http://www.julianhosp.com ---------------- My name is Dr. Julian Hosp or just Julian. My videos are about Bitcoin, Ethereum, Blockchain and crypto currencies in general, to avoid scam, rip-off and fraud especially in mining. I'm talking about how you can invest wisely and do it rationally and simply. My ultimate goal is to make people all around the world #CRYPTOFIT. I.E fit for this new wave of decentralization and blockchain. Have fun! ► Follow me here and stay in touch: Facebook: www.facebook.com/julianhosp/ Twitter: https://twitter.com/julianhosp Instagram: https://www.instagram.com/julianhosp/ Linkedin: https://www.linkedin.com/julianhosp
Views: 1929 Dr. Julian Hosp
History of cryptography
 
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Cryptography History of cryptography To get certificate subscribe: https://www.coursera.org/learn/crypto Playlist URL: https://www.youtube.com/playlist?list=PL2jykFOD1AWYosqucluZghEVjUkopdD1e About this course: Cryptography is an indispensable tool for protecting information in computer systems. In this course you will learn the inner workings of cryptographic systems and how to correctly use them in real-world applications. The course begins with a detailed discussion of how two parties who have a shared secret key can communicate securely when a powerful adversary eavesdrops and tampers with traffic. We will examine many deployed protocols and analyze mistakes in existing systems. The second half of the course discusses public-key techniques that let two parties generate a shared secret key.
Views: 431 intrigano
History of Cryptography
 
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Brief History of Cryptography
Views: 198 shaan1111
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: 179997 Kenny Luminko
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: 728 Binance Academy
Cryptography Basically
 
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This is a video version of a lesson I used for my kids on the basics of cryptography. Hopefully it will be useful for others, either for teaching their kids, or just for a fun approach to the topic. The subject today is the One Time Pad. A later video will cover other techniques, like shared key and public key cryptography. If you want to play with the one time pad, I've put together a simple page to do so: http://www.snoyman.com/static/onetimepad/vue.html And if you have ideas for future videos, please feel free to leave them in the comments.
Views: 3513 Michael Snoyman
The Mathematics of Cryptography
 
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Click here to enroll in Coursera's "Cryptography I" course (no pre-req's required): https://click.linksynergy.com/deeplink?id=vFuLtrCrRW4&mid=40328&murl=https%3A%2F%2Fwww.coursera.org%2Flearn%2Fcrypto%3Futm_term%3Dmajorprep_cryptography_jan2019 Watch Part 2: https://youtu.be/xmwxDHX6xUc Join Facebook Group: https://www.facebook.com/groups/majorprep/ Follow MajorPrep on Twitter: https://twitter.com/MajorPrep1 ►Support the Channel Patreon: https://patreon.com/majorprep PayPal(one time donation): https://www.paypal.me/majorprep ►My Setup: Space Pictures: https://amzn.to/2CC4Kqj Magnetic Floating Globe: https://amzn.to/2VgPdn0 Camera: https://amzn.to/2RivYu5 Mic: https://amzn.to/2BLBkEj Tripod: https://amzn.to/2RgMTNL Equilibrium Tube: https://amzn.to/2SowDrh ►Check out the MajorPrep Amazon Store: https://www.amazon.com/shop/majorprep *************************************************** ► For more information on math, science, and engineering majors, check us out at https://majorprep.com Best Ways to Contact Me: Facebook, twitter, or email ([email protected])
Views: 50169 MajorPrep
Public key cryptography - Diffie-Hellman Key Exchange (full version)
 
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The history behind public key cryptography & the Diffie-Hellman key exchange algorithm. We also have a video on RSA here: https://www.youtube.com/watch?v=wXB-V_Keiu8
Views: 628394 Art of the Problem
The Innovation of Cryptology: An Enigma of History
 
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This documentary for the National History Day project is about how the innovation of cryptology has changed history and impacted warfare and our everyday lives for years. We do not own the rights to any of the pictures, music, or video contained in this video.
Views: 7125 Krish Lingala
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: 62463 Pico Cetef
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
Cryptography 101 - The Basics
 
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In this video we cover basic terminology in cryptography, including what is a ciphertext, plaintext, keys, public key crypto, and private key crypto.
Views: 281915 Pico Cetef
INTRODUCTION TO CRYPTOGRAPHY IN HINDI
 
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find relevant notes at-https://viden.io/
Views: 61158 LearnEveryone
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: 144212 Lacey Wright
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: 428961 Computerphile
Public Key Cryptography: RSA Encryption Algorithm
 
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RSA Public Key Encryption Algorithm (cryptography). How & why it works. Introduces Euler's Theorem, Euler's Phi function, prime factorization, modular exponentiation & time complexity. Link to factoring graph: http://www.khanacademy.org/labs/explorations/time-complexity
Views: 567203 Art of the Problem
The Enigma encryption machine | Journey into cryptography | Computer Science | Khan Academy
 
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WW2 Encryption is explored with a focus on the Enigma. Read more here. Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/perfect-secrecy?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/frequency-stability?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: 189728 Khan Academy Labs
Lecture 1: Introduction to Cryptography by Christof Paar
 
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For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com. The book chapter "Introduction" for this video is also available for free at the website (click "Sample Chapter").
History and Evolution of Cryptography and Cryptanalysis
 
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This video is part of Riscure’s free online training “Side Channel Analysis (SCA) for IoT developers - A practical introduction”. You can follow this course FOR FREE by simply clicking on the link below. https://riscure.talentlms.com/shared/start/key:ZETDNHRK If you are interested in more online security trainings or webinars, contact Riscure Security Training for more information. https://www.riscure.com/training/ In this video we take a brief look at the historical evolution of cryptography and cryptanalysis, up to the point where Side Channel Analysis became a well-established means of breaking modern algorithms. Cryptography is the study of secure communication in the presence of adversaries, and has been constantly evolving since ancient times. Around the 20th century, the theoretical foundation on which modern, theoretically secure algorithms rely was laid. But the landscape changed again in the 21st century, when researchers observed that the implementation of cryptographic algorithms can be vulnerable to physical attacks. This gave rise to Side Channel Analysis, a technique which exploits the information leakage of cryptographic devices.
Views: 91 Riscure
Whitfield Diffie on the History of Cryptography
 
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In this episode, I talk with legend of cryptography, Whitfield Diffie. Whit was working on cryptography long before Bitcoin existed, building the foundations for which Bitcoin relies upon. We discuss his history, Bitcoin and his views on privacy. LISTEN TO THE FULL EPISODE HERE AND ACCESS LINKS TO THE SHOW NOTES https://www.whatbitcoindid.com/podcast/whitfield-diffie-on-the-history-of-cryptography WHERE TO FIND THE SHOW → My website: https://www.whatbitcoindid.com/podcast/ → iTunes: https://apple.co/2OOlzVV → Spotify: https://spoti.fi/2ygc4W1 → Stitcher: https://bit.ly/2IQO8fX → SoundCloud: https://bit.ly/2CGSVQR → YouTube: https://bit.ly/2pR3s3g → TuneIn: https://bit.ly/2ywystr LISTEN TO OLD EPISODES → By guest: https://www.whatbitcoindid.com/guests/ → By topic: https://www.whatbitcoindid.com/topics/ → Transcriptions: https://www.whatbitcoindid.com/transcriptions/ SUPPORT THE SHOW → https://www.whatbitcoindid.com/sponsorship/ → Become a Patron: https://www.patreon.com/whatbitcoindid/ → Subscribe on iTunes → Leave a review on iTunes → Share the show out with your friends and family on social media → Drop me a line on [email protected] WHERE TO FOLLOW ME: → Twitter: https://twitter.com/whatbitcoindid/ → Medium: https://medium.com/@whatbitcoindid/ → Instagram: http://instagram.com/whatbitcoindid/ → Facebook: https://www.facebook.com/whatbitcoindid/ → YouTube: https://www.youtube.com/whatbitcoindid/ → Website: https://www.whatbitcoindid.com/ → Email list: https://www.whatbitcoindid.com/subscripton/ LEARN ABOUT BITCOIN & CRYPTO: → Step by Step Guide: https://www.whatbitcoindid.com/beginners-guide/ → Training: https://www.whatbitcoindid.com/training/ → Resources: https://www.whatbitcoindid.com/resources/ ***** “It is rare for first implementations of such broad concepts to do as well as that did, Bitcoin is still here 10 years after it started out.” — Whitfield Diffie Interview location: Palo Alto Interview date: Thursday 31st Jan, 2019 Company: Cryptomathic Role: Cryptographer and Security Expert A number of pioneers developed the cryptographic and technical foundations for which Bitcoin is built upon. Nick Szabo highlighted a number of these people in his Tweet: “Inventors of the most important technologies in Bitcoin: digital signatures and Merkle trees (Merkle), elliptic curve crypto (Koblitz), malicious-fault-tolerant consensus (Lamport), elliptic curve crypto (independent inventor: Miller).” Many others along the way have contributed to the success of Bitcoin, either through early work or attempts at created a digital currency, names such as Adam Back, David Chaum and Szabo himself. Whitfield Diffie sits alongside all of these people. His work on cryptography should not be forgotten in the history of Bitcoin and I had the pleasure of sitting down with him to discuss this, how he was introduced to Bitcoin and other such topics as privacy and security. ***** 00.03.09: Intro and welcome 00.03.48: The father of cryptography 00.04.46: Cryptography third wave with cryptocurrencies 00.05.44: Whit’s back story 00.07.44: The journey to become a cryptographer 00.18.14: Understanding cryptography 00.25.16: Early thoughts of money with cryptography 00.28.12: The centralisation problem with digital currencies 00.30.51: Whit’s exposure to Bitcoin 00.36.19: Where we use cryptography 00.39.55: Privacy 00.43.29: Thoughts on the evolution of technology 00.47.10: Cryptography and world security 00.56.27: Quantum computing 00.59.14: Significant unsolved problems in cryptography
Views: 1523 whatbitcoindid
Lecture 2: Modular Arithmetic and Historical Ciphers by Christof Paar
 
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For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com
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: 492732 World Science Festival
Lecture 5: Data Encryption Standard (DES): Encryption by Christof Paar
 
01:33:37
For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com
The Hunt for the Zodiac Killer: Codebreaking 101 | History
 
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Kevin Knight describes how a team developed a high-tech codebreaking AI called Carmel to crack the Zodiac cypher. Subscribe for more from Hunt for the Zodiac Killer and other great HISTORY shows: http://www.youtube.com/subscription_center?add_user=historychannel Find out more about the show and watch full episodes on our site: http://www.history.com/shows/the-hunt-for-the-zodiac-killer Newsletter: https://www.history.com/newsletter Website - http://www.history.com Facebook - https://www.facebook.com/History Twitter - https://twitter.com/history The Hunt for the Zodiac Killer Season 1 Episode 1 On "The Hunt for the Zodiac Killer," LAPD homicide detective Sal LaBarbera and a team of master codebreakers use their unrivaled expertise to bring the most mysterious serial killer in American history into the light. HISTORY®, now reaching more than 98 million homes, is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s all-original programming slate features a roster of hit series, epic miniseries, and scripted event programming. Visit us at HISTORY.com for more info.
Views: 81052 HISTORY
Information Security—Before & After Public-Key Cryptography
 
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[Recorded Jan 26, 2005] Whitfield Diffie, a key figure in the discovery of public-key cryptography, traces the growth of information security through the 20th century and into the 21st. In the 1970s, the world of information security was transformed by public-key cryptography, the radical revision of cryptographic thinking that allowed people with no prior contact to communicate securely. "Public key" solved security problems born of the revolution in information technology that characterized the 20th century and made Internet commerce possible. Security problems rarely stay solved, however. Continuing growth in computing, networking, and wireless applications have given rise to new security problems that are already confronting us.
Views: 105310 Computer History Museum
Uncrackable Pen & Paper Cryptography
 
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Why there is always a safe place for PEOPLE to communicate. P.S. 1. Yes, this is just a "one time pad", and using each key only once is crucial. 2. Yes, this is uncrackable. Without the key you cannot get the message. Brute force does not work as it gives all possible messages and does not say which is the one being sent. 3. Yes, random numbers do exist, but for this a pair of dice is more than adequate.
Views: 3133 RevK
Lecture 3: Stream Ciphers, Random Numbers and the One Time Pad by Christof Paar
 
01:29:39
For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com
Introduction to Cryptography and system security | CSS series #1
 
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Take the Full Course of Cryptography and Network Security What we Provide 1) 20 Videos (Index is given down) + More Update will be Coming Before final exams 2)Hand made Notes with problems for your to practice 3)Strategy to Score Good Marks in Cryptography and Network Scurity To buy the course click https://goo.gl/mpbaK3 if you have any query email us at [email protected] Sample Notes : https://goo.gl/Ze1FpX or Fill the form we will contact you https://goo.gl/forms/2SO5NAhqFnjOiWvi2 Cryptography and System Security Index Lecture 1 Introduction to Cryptography and Security System Lecture 2 Security Goals and Mechanism Lecture 3 Symmetric Cipher Lecture 4 Substitution Cipher Lecture 5 Transposition Cipher Lecture 6 Stream and Block Cipher Lecture 7 Mono Alphabetic Cipher Lecture 8 Poly Alphabetic Cipher Lecture 9 Diffie Hellman Lecture 10 RSA Algorithm with Solved Example Lecture 11 IDEA Algorithm Full Working Lecture 12 SHA-1 Algorithm Full Working Lecture 13 Blowfish Algorithm Full working Lecture 14 DES Algorithm Full Working Lecture 15 Confusion and Diffusion Lecture 16 AES Algorithm Full working Lecture 17 Kerberos Lecture 18 Malicious Software ( Virus and worms ) Lecture 19 DOS and DDOS Attack Lecture 20 Digital Signature Full working Explained More videos Coming Soon.
Views: 125950 Last moment tuitions
Cryptography 101
 
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Cryptography is a complex and confusing subject. In this talk you will learn about the core components of cryptography used in software development: securing data with encryption, ensuring data integrity with hashes and digital signatures, and protecting passwords with key derivation functions. While learning how to use these components, you will also learn the best practices that drive strong cryptography. This talk won’t make you a cryptography expert but it will give you the knowledge necessary to use cryptography properly. No prior knowledge of cryptography is required for this presentation. EVENT: the Dutch PHP Conference in 2018 SPEAKER: Adam Englander PERMISSIONS: Original video was published with the Creative Commons Attribution license (reuse allowed). CREDITS: Original video source: https://www.youtube.com/watch?v=KcjJ19geKmA&t=1s
Views: 7356 Coding Tech
22. Cryptography: Encryption
 
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MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Srinivas Devadas In this lecture, Professor Devadas continues with cryptography, introducing encryption methods. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 17230 MIT OpenCourseWare
Cryptography: The Math of the Public Private Key of RSA
 
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Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! :) https://www.patreon.com/patrickjmt !! Part 1: https://youtu.be/PkpFBK3wGJc Please consider being a supporter on Patreon! https://www.patreon.com/patrickjmt Twitter: @Patrick_JMT In this video I show mathematically for RSA encryption works by going through an example of sending an encrypted message! If you are interested in seeing how Euclid's algorithm would work, check out this video by Emily Jane: https://www.youtube.com/watch?v=fz1vxq5ts5I A big thanks to the 'Making & Science team at Google' for sponsoring this video! Please like and share using hashtag #sciencegoals
Views: 41051 patrickJMT
What is Cryptography
 
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www.hiteshChoudhary.com www.newdemy.com What is Cryptography? Cryptography is a very interesting science of information security. The word Cryptography is derived from Greek kryptos, meaning hidden. Cryptography is not alone word or one word for all related information security science. Words like cryptanalysis, cipher and cryptology are always included in this science. Cryptography includes techniques such as microdots, merging words with images, and other ways to hide information in storage or transit. However, in today's computer-centric world, cryptography is most often associated with scrambling plaintext (ordinary text, sometimes referred to as clear text) into cipher text (unreadable text obtained after a process called encryption), then back again (known as decryption). Individuals who practice this field are known as cryptographers. There is also a word, Cryptosystem that you will see a lot in this video course. Procedures and protocols that are used in cryptography makes up a system that is known as cryptosystem. Cryptosystem are mostly referred as computer programs or protocols but I would like it to extend to a much wider plot. It also include human behavior as social engineering is still one of the fastest technique to compromise a system or application. Things like choosing typical password, logging off unused systems, protecting sensitive files also plays a vital role in cryptosystem. Although, it is considered that 1st use of modern cryptography was by Julius Caesar, who did not trust his messenger when communicating with his governors. But I think the need of encryption came in high demand after the invention of radio as one can tune into your frequency range and intercept your message. But if the transmission is encrypted then things get changed. In recent times, cryptography has turned into a battleground of some of the world's best mathematicians and computer scientists. The ability to securely store and transfer sensitive information has proved a critical factor in success in war and business. To understand more about cryptography, let’s call our friends Alice and Bob. Now Alice wants to transfer some information to Bob but wants to do it securely. Alice decided that instead of transferring information in clear text form, I’ll encrypt this text with some algorithm and key. Then I’ll pass this cipher text. Now bob should also have the key and decryption algorithm to read the information. The two major problems are secure transfer of key and knowledge about algorithm. Things like degree of complexity of algorithm and its randomness also plays a vital role in cryptography. This course is going to be a detailed overview about all these things.
Views: 3850 Hitesh Choudhary
Cryptography 101: A History and the Basics of Cryptography - Bryant Hagen
 
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As long as someone wants to keep data safe from another person or group Cryptography will always be needed. However there are good ciphers and bad ciphers to use depending on what you want to use them for. In this talk I will go over the basics and the history of Cryptography to explain why ciphers while trivially broken today were broken at the time where rainbow tables or powerful computers were not available.
Views: 143 LASCON
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: 62649 Mathispower4u