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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: 823035 SciShow
Symmetric Key and Public Key Encryption
 
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Modern day encryption is performed in two different ways. Check out http://YouTube.com/ITFreeTraining or http://itfreetraining.com for more of our always free training videos. Using the same key or using a pair of keys called the public and private keys. This video looks at how these systems work and how they can be used together to perform encryption. Download the PDF handout http://itfreetraining.com/Handouts/Ce... Encryption Types Encryption is the process of scrambling data so it cannot be read without a decryption key. Encryption prevents data being read by a 3rd party if it is intercepted by a 3rd party. The two encryption methods that are used today are symmetric and public key encryption. Symmetric Key Symmetric key encryption uses the same key to encrypt data as decrypt data. This is generally quite fast when compared with public key encryption. In order to protect the data, the key needs to be secured. If a 3rd party was able to gain access to the key, they could decrypt any data that was encrypt with that data. For this reason, a secure channel is required to transfer the key if you need to transfer data between two points. For example, if you encrypted data on a CD and mail it to another party, the key must also be transferred to the second party so that they can decrypt the data. This is often done using e-mail or the telephone. In a lot of cases, sending the data using one method and the key using another method is enough to protect the data as an attacker would need to get both in order to decrypt the data. Public Key Encryption This method of encryption uses two keys. One key is used to encrypt data and the other key is used to decrypt data. The advantage of this is that the public key can be downloaded by anyone. Anyone with the public key can encrypt data that can only be decrypted using a private key. This means the public key does not need to be secured. The private key does need to be keep in a safe place. The advantage of using such a system is the private key is not required by the other party to perform encryption. Since the private key does not need to be transferred to the second party there is no risk of the private key being intercepted by a 3rd party. Public Key encryption is slower when compared with symmetric key so it is not always suitable for every application. The math used is complex but to put it simply it uses the modulus or remainder operator. For example, if you wanted to solve X mod 5 = 2, the possible solutions would be 2, 7, 12 and so on. The private key provides additional information which allows the problem to be solved easily. The math is more complex and uses much larger numbers than this but basically public and private key encryption rely on the modulus operator to work. Combing The Two There are two reasons you want to combine the two. The first is that often communication will be broken into two steps. Key exchange and data exchange. For key exchange, to protect the key used in data exchange it is often encrypted using public key encryption. Although slower than symmetric key encryption, this method ensures the key cannot accessed by a 3rd party while being transferred. Since the key has been transferred using a secure channel, a symmetric key can be used for data exchange. In some cases, data exchange may be done using public key encryption. If this is the case, often the data exchange will be done using a small key size to reduce the processing time. The second reason that both may be used is when a symmetric key is used and the key needs to be provided to multiple users. For example, if you are using encryption file system (EFS) this allows multiple users to access the same file, which includes recovery users. In order to make this possible, multiple copies of the same key are stored in the file and protected from being read by encrypting it with the public key of each user that requires access. References "Public-key cryptography" http://en.wikipedia.org/wiki/Public-k... "Encryption" http://en.wikipedia.org/wiki/Encryption
Views: 496181 itfreetraining
NETWORK SECURITY - BLOCK CIPHER MODES OF OPERATION
 
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1. Electronic Code Book Mode 2. Cipher Block Chaining Mode 3. Output Feedback Mode 4. Cipher Feedback Mode 5. Counter Mode
L18 - Parallel Join Algorithms (Hashing) [CMU Database Systems Spring 2017]
 
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Slides PDF: http://15721.courses.cs.cmu.edu/spring2017/slides/18-hashjoins.pdf Reading List: http://15721.courses.cs.cmu.edu/spring2017/schedule.html#mar-28-2017 Andy Pavlo (http://www.cs.cmu.edu/~pavlo/) 15-721 Advanced Database Systems (Spring 2017) Carnegie Mellon University
Views: 945 CMU Database Group
Algorithms Are Already Controlling Our Lives
 
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Derrick Broze explains how algorithms and artificial intelligence are already making decisions for humanity. Sources: Algorithms have already taken over human decision making https://theconversation.com/algorithms-have-already-taken-over-human-decision-making-111436 When Humans Using the IT Artifact Becomes IT Using the Human Artifact https://demetis.files.wordpress.com/2018/12/Demetis-Lee-JAIS-17-0175.R2-FINAL.pdf *Support our friends The Fairies Pyjamas! https://www.fairiespyjamas.com Please help us advance truth, healing, community building, and empowering the people to wake up and build a better world: https://www.Patreon.com/DerrickBroze https://paypal.me/consciousresistance Support via crypto: https://bitbacker.io/user/dbroze/#profile-panel The Conscious Resistance Network can be found here: https://www.theconsciousresistance.com https://www.Minds.com/TheConsciousResistanceNetwork https://www.steemit.com/@dbroze Discord channel: https://discord.gg/tQrNTYS Join our text list for direct updates: https://www.remind.com/join/dbjourno The Conscious Resistance Network is an independent media organization focused on empowering individuals through education, philosophy, health, and community organizing. We work to create a world where corporate and state power does not rule over the lives of free human beings.
Linux Security News - NSA Encryption Algorithms added to Kernel 4.17
 
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NSA developed algorithms Simon and Speck have been rejected by the ISO, but pushed into the Linux Kernel at the request of Google under the guise of providing encryption for low powered Android devices. Sources: https://itsfoss.com/nsas-encryption-algorithm-in-linux-kernel-is-creating-unease-in-the-community/ https://www.spinics.net/lists/linux-crypto/msg33291.html https://rainrfid.org/wp-content/uploads/2015/07/Wingers-RAINRFID.pdf https://git.archlinux.org/svntogit/packages.git/tree/trunk/config?h=packages/linux#n9340 https://wiki.archlinux.org/index.php/Kernel_module#Blacklisting https://en.wikipedia.org/wiki/Simon_(cipher) https://github.com/inmcm/Simon_Speck_Ciphers/blob/master/C/simon.c https://en.wikipedia.org/wiki/Speck_(cipher) https://github.com/inmcm/Simon_Speck_Ciphers/blob/master/C/speck.c https://en.wikipedia.org/wiki/Security-Enhanced_Linux https://en.wikipedia.org/wiki/EternalBlue https://eprint.iacr.org/2017/560.pdf Like my channel? Please help support it: Patreon: https://www.patreon.com/quidsup Paypal: https://www.paypal.me/quidsup Follow me on Social Media Google+ https://google.com/+quidsup Twitter: https://twitter.com/quidsup Minds: https://minds.com/quidsup
Views: 4555 quidsup
How to Encrypt Strings and Files in Python
 
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In this video I show you how to encrypt and decrypt strings and files using Python. I show you how to create a key, store the key and then how to use the key to encrypt and decrypt strings and files. This video demonstrates the use of the cryptography module. 🌎 Post with code and a written tutorial: https://nitratine.net/blog/post/encryption-and-decryption-in-python/ 📺 Auto Py to Exe: https://youtu.be/OZSZHmWSOeM 📺 Python GUI Using Chrome: https://youtu.be/2kbeBzEQfXE 📺 How to Send Emails in Python: https://youtu.be/YPiHBtddefI The cryptography is supported by Python 2.7 and Python 3.4 and above. (Also PyPy 5.3+) 🌎 cryptography docs: https://cryptography.io/en/latest/ 🐍 In this video I use Python 3.6. 👍🏼 Feel free to comment with any issues.
Views: 18900 PyTutorials
End to End Encryption (E2EE) - Computerphile
 
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End to end encryption, government ministers are again talking about stopping it. What is it and why might that be a bad idea? Dr Mike Pound explains. Hololens: https://youtu.be/gp8UiYOw8Fc Blockchain: https://youtu.be/qcuc3rgwZAE 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: 296259 Computerphile
Hashing Techniques Hash Function, Types of Hashing Techniques in Hindi and English
 
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Hashing Techniques Hash Function, Types of Hashing Techniques in Hindi and English * Direct Hashing * Modulo-Division Hashing * Mid-Square Hashing * Folding Hashing - Fold-Shift Hashing and Fold Boundary Hashing * PseudoRandom Hashing * Subtraction Hashing For Students of B.Tech, B.E, MCA, BCA, B.Sc., M.Sc., Courses - As Per IP University Syllabus and Other Engineering Courses
Views: 263685 Easy Engineering Classes
Why It's So Hard For The Government To Hack Your Phone
 
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The FBI is currently in a battle with Apple to allow encrypted phones be unlocked, but how does encryption even work? How Powerful Is Apple? ►►►► http://bit.ly/1OBOqRk Sign Up For The TestTube Newsletter Here ►►►► http://bit.ly/1myXbFG How Secure Are Fingerprint Scanners? ►►►►http://bit.ly/1R7K5qX Read More: ADVANCED ENCRYPTION STANDARD (AES) http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf "The Advanced Encryption Standard (AES) specifies a FIPS-approved cryptographic algorithm that can be used to protect electronic data. The AES algorithm is a symmetric block cipher that can encrypt (encipher) and decrypt (decipher) information." "This standard may be used by Federal departments and agencies when an agency determines that sensitive (unclassified) information" Analysis of Avalanche Effect in Plaintext of DES using Binary Codes http://www.ijettcs.org/Volume1Issue3/IJETTCS-2012-10-25-097.pdf "Cryptography provides a method for securing and authenticating the transmission of information across insecure communication channels." "Symmetric keys encryption or secret key encryption identical key is used by sender and receiver." "Data can be recovered from cipher only by using exactly the same key used to encipher it." Advanced Encryption Standard (AES) http://searchsecurity.techtarget.com/definition/Advanced-Encryption-Standard "The Advanced Encryption Standard became effective as a federal government standard in 2002" "ES is one of the Suite B cryptographic algorithms used by NSA's Information Assurance Directorate in technology approved for protecting national security systems." iOS Security http://www.apple.com/business/docs/iOS_Security_Guide.pdf#page=12 "On mobile devices, speed and power efficiency are critical. Cryptographic operations are complex and can introduce performance or battery life problems if not designed and implemented with these priorities in mind." "Every iOS device has a dedicated AES 256 crypto engine built into the DMA path between the flash storage and main system memory, making file encryption highly efficient" ____________________ DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos twice daily. Watch More DNews on TestTube http://testtube.com/dnews Subscribe now! http://www.youtube.com/subscription_center?add_user=dnewschannel DNews on Twitter http://twitter.com/dnews Trace Dominguez on Twitter https://twitter.com/tracedominguez Julia Wilde on Twitter https://twitter.com/julia_sci DNews on Facebook https://facebook.com/DiscoveryNews DNews on Google+ http://gplus.to/dnews Discovery News http://discoverynews.com Download the TestTube App: http://testu.be/1ndmmMq Sign Up For The TestTube Mailing List: http://dne.ws/1McUJdm
Views: 330057 Seeker
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: 194930 PBS Infinite Series
Elliptic Curve Cryptography Overview
 
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John Wagnon discusses the basics and benefits of Elliptic Curve Cryptography (ECC) in this episode of Lightboard Lessons. Check out this article on DevCentral that explains ECC encryption in more detail: https://devcentral.f5.com/articles/real-cryptography-has-curves-making-the-case-for-ecc-20832
Views: 180521 F5 DevCentral
3rd BIU Winter School on Cryptography: Non-interactive Zero Knowledge - Jens Groth
 
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The 3rd Bar-Ilan Winter School on Cryptography: Bilinear Pairings in Cryptography, which was held between February 4th - 7th, 2013. The event's program: http://crypto.biu.ac.il/winterschool2013/schedule2013.pdf For All 2013 Winter school Lectures: http://www.youtube.com/playlist?list=PLXF_IJaFk-9C4p3b2tK7H9a9axOm3EtjA&feature=mh_lolz Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 2770 barilanuniversity
How Encryption Keeps Your Data Safe
 
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Start protecting yourself on the web at https://NordVPN.com/SCISHOW or use code SCISHOW to save 75% off of a 3-year Virtual Private Network plan, plus 1 month free. Keeping our data safe and secure is necessary in today's world, but a lot of the encryption we depend on has been in development for thousands of years! Hosted by: Stefan Chin Head to https://scishowfinds.com/ for hand selected artifacts of the universe! ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Lazarus G, Sam Lutfi, D.A. Noe, الخليفي سلطان, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, charles george, Kevin Bealer, Chris Peters ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://book.itep.ru/depository/crypto/Cryptography_history.pdf https://www.sans.org/reading-room/whitepapers/vpns/history-encryption-730 http://cryptogramma.com/cryptogramma/How_it_works.html https://books.google.com/books?id=Zb2RBQAAQBAJ&lpg=PA14&ots=ycTpjodUS3&pg=PA14#v=onepage&f=false https://www.britannica.com/topic/transposition-cipher https://books.google.com/books?id=o3YbiVuTg70C&lpg=PP1&pg=PT29#v=onepage&q&f=false http://penelope.uchicago.edu/Thayer/E/Roman/Texts/Plutarch/Lives/Lysander*.html https://www.coursera.org/lecture/symmetric-crypto/product-cipher-d1DgA http://www.moserware.com/2009/09/stick-figure-guide-to-advanced.html https://www.youtube.com/watch?v=aH6h52aMGT8 https://dl.acm.org/citation.cfm?id=1824151 http://www.networkdls.com/Articles/tr-601.pdf ftp://ftp.rsasecurity.com/pub/pdfs/tr701.pdf https://link.springer.com/content/pdf/10.1007%2FBFb0040277.pdf http://cacr.uwaterloo.ca/hac/about/chap6.pdf https://www.youtube.com/watch?v=MsqqpO9R5Hc https://www.youtube.com/watch?v=GSIDS_lvRv4 https://www.digicert.com/TimeTravel/math.htm
Views: 94396 SciShow
3rd BIU Winter School on Cryptography: How Pairings Work - Florian Hess
 
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The 3rd Bar-Ilan Winter School on Cryptography: Bilinear Pairings in Cryptography, which was held between February 4th - 7th, 2013. The event's program: http://crypto.biu.ac.il/winterschool2013/schedule2013.pdf For All 2013 Winter school Lectures: http://www.youtube.com/playlist?list=PLXF_IJaFk-9C4p3b2tK7H9a9axOm3EtjA&feature=mh_lolz Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 2626 barilanuniversity
Cryptarithmethic Problems in eLitmus and Infosys | Tricks for Cryptarithmetic Questions and Answers
 
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#MUSTWATCH http://bit.ly/2Thh04i - If you are preparing for placements or struggling with your aptitude/coding preparation for a job then spend 13 minutes to watch this. Only 2.5 lakh students get placed through campus placements out of 9.7 lakhs who are eligible for campus placements each year and when we conducted an extensive survey, 76% of the unplaced candidates told us that that the single biggest thing they could have done better to improve their placements was starting their preparation early. To help candidates like you prepare for placements, we at FACE Prep have hosted a free guidance workshop - http://bit.ly/2S3s8p8 on How to Crack your Dream Job on Campus in Just 6 months.. If you got a call letter for the Infosys Referral Drive (Phase 3) which will be held on the 7th and 8th of April then register here for study material - https://faceprep11.typeform.com/to/P0jjyW For FREE mock tests based on the latest company pattern and FREE practice exercises visit - https://www.faceprep.in/aptipedia. In the quantitative aptitude section of the eLitmus pH test and Infosys Aptitude Test mathematical reasoning section, 1 or 2 questions will be on the topic Cryptarithmetic. What is cryptarithmetic? This topic involves just basic addition and subtraction, but it’s not easy to solve without practice. There will be two words which will be added or subtracted to get another word and all the alphabets of these words will be coded with a unique number. You will have to find all the unique numbers as coded and we have to answer the given question. Cryptarithmetic is easy if you understand the basics clearly and practice more problems. Subscribe to our channel for Placement Preparation videos - https://goo.gl/UdGsKr Don't forget to hit the bell icon to get notified for live classes. Like, comment and share our videos
Views: 93204 faceprep
NETWORK SECURITY - SUBSTITUTION TECHNIQUES
 
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Substitution Techniques Here the Plain Text Letters are replaced with Cipher Text Characters 1) Caesar Cipher 2) Play Fair Cipher
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: 1345487 Origins Explained
Ask Developer Podcast - 49 - Cryptography - Part 3 - Digital Signatures and Protocols
 
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○ Digital Signatures § Goal: verify Authenticity of a message. § Based on Asymmetric Cryptography. § Basic operations 1. Public / Private keys generation (using some algorithm like RSA) 2. Signing algorithm using the private key 3. Signature verification algorithm using the corresponding public key i. Extending previous Example • Steps (Order is very important, bold stuff is the difference added to authenticate sender) ® Party 1 (Alice) 1. Generates a random AES Session Key (32 bytes / 256 bits) 2. Generates a random Initialization Vector (IV) (16 bytes / 128 bits) 3. Encrypt the message to be sent using the AES Session Key & IV 4. Calculate an HMAC of the encrypted message using the AES Session key 5. Encrypt the AES Session Key using the Public Key of Party 2 (Bob) The recipient. 6. Calculate Signature using the private signing key on the HMAC 7. Sends a packet of (Encrypted Message, Encrypted Session Key, Initialization Vector, HMAC, and Signature) to Bob ® Party 2 (Bob) 1. Decrypts Session key using his Private Key 2. Recalculates the HMAC of the encrypted message (Validates message integrity) } If HMAC check pass – Verify digital signature using Alice Public Key w If signature verification pass w Decrypts the message using the decrypted AES Session Key and Initialization Vector w Otherwise, identity of the sender couldn't not be verified, reject message. } Otherwise, rejects the message because of integrity check failure. • Why Order matters? ® Timing Side-Channel Attacks ® Padding-Oracle Attack ○ Protocols § TLS/SSL • How TLS/SSL Works? • Mitigates against ® Man in the Middle Attacks ® Authentication, so the client can be sure it is talking to the correct destination. § Public Key Infrastructure (PKI) • Certificates aka X.509 Certificate (Sha-1 Signature Issues) ® A digitally signed file ® Identifies (Computer / User / Device) ® Has Public & Private Key, only the certificate owner has the Private Key. ® Has Expiration date ® Information about the CA that issued the cert ® X.509 Extension Attributes (like Usage attribute) ® Revocation Information. • Certificate Authority (CA) (CNNIC, WoSign) ® Issues, signs and manages certificates. ® Famous certificate authorities (Verisign, GoDaddy, … etc). • Trust Chains ® CA's can delegate the signing job to subordinate CA's ◊ Root CA's signs an intermediate signing certificate to the subordinate CA ® The subordinate CA can then issue certificates ® To validate a certificate, the client validates the signatures of all the intermediate stages and make sure all of them are linked to a Trusted CA • Certificate Revocation Lists (CRL's) ® When a certificate is compromised (Private Key leaked) it will be published on the CRL, so each time the cert is validated, the CRL list is checked in case cert is revoked. 3. Takeaways 4. Books a. Understanding Cryptography: A Textbook for Students and Practitionershttps://www.amazon.com/Understanding-Cryptography-Textbook-Students-Practitioners/dp/3642041000 Our facebook Page http://facebook.com/askdeveloper On Sound Cloud http://soundcloud.com/askdeveloper Please Like & Subscribe
Views: 843 Mohamed Elsherif
Monoalphabetic Shift/Caesar Cipher
 
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Monoalphabetic Shift/Caesar Cipher Encryption and Decryption
Views: 59033 Daniel Rees
How Does SHA-1 Work - Intro to Cryptographic Hash Functions and SHA-1
 
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Learn more advanced front-end and full-stack development at: https://www.fullstackacademy.com SHA-1 stands for Secure Hash Algorithm 1, a cryptographic hash function developed by the NSA that can be used to verify that a file has been unaltered. In this video, we go over the basic features and common implementations of cryptographic hash functions before diving into the inner workings of a Javascript implementation of the SHA-1 function. Although out of use now, walking through the hash function code provides valuable insight into how these algorithms work. Watch this video to learn: - What are Cryptographic Hash Functions - Practical uses for Cryptographic Hash Functions - How does SHA-1 work
Views: 14100 Fullstack Academy
A5/1 STREAM CIPHER in GSM cellular networks - animation of how it works
 
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This is animation of the principle of A5/1 stream cipher used to provide over-the-air communication privacy in the GSM cellular telephone standard. It is one of seven algorithms which were specified for GSM use. A5/1 is used in Europe and the United States. A5/1 was developed in 1987, initially kept secret, the general design was leaked in 1994 and the algorithms were entirely reverse engineered in 1999 by Marc Briceno from a GSM telephone.
Views: 34175 Jirka Matousek
3rd BIU Winter School on Cryptography: Identity-Based Encryption and Variants - Dan Boneh
 
01:25:53
The 3rd Bar-Ilan Winter School on Cryptography: Bilinear Pairings in Cryptography, which was held between February 4th - 7th, 2013. The event's program: http://crypto.biu.ac.il/winterschool2013/schedule2013.pdf For All 2013 Winter school Lectures: http://www.youtube.com/playlist?list=PLXF_IJaFk-9C4p3b2tK7H9a9axOm3EtjA&feature=mh_lolz Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 6280 barilanuniversity
RSA Encryption Matlab code
 
05:25
=================================================== Get the code from here: https://gum.co/vefiy =================================================== This code implements RSA encryption algorithm in matlab which depend on generating very large prime numbers (there is an implemented function to generate the prime numbers randomely), these numbere are used as encryption and decryption keys using the RSA algorithm for encryption and by seperating keys as private and public as explained in the video. The code takes a text file as an input and use the content as the message to be encrypted and then the sent encrypted message along with its decryption is printed. Author: Ahmed Abu Bakr Contact me: email: [email protected] List of all my codes: https://gumroad.com/ahmedsaleh =================================================== Hire me directly on freelancer: https://www.freelancer.com/u/AhmedSobhiSaleh ===================================================
Views: 1403 Ahmed Saleh
Introduction to Digital Signature | Public Key cryptography
 
09:39
This video lecture is produced by S. Saurabh. He is B.Tech from IIT and MS from USA. Introduction to Digital Signature | Public Key cryptography To study interview questions on Linked List watch http://www.youtube.com/playlist?list=PL3D11462114F778D7&feature=view_all To prepare for programming Interview Questions on Binary Trees http://www.youtube.com/playlist?list=PLC3855D81E15BC990&feature=view_all To study programming Interview questions on Stack, Queues, Arrays visit http://www.youtube.com/playlist?list=PL65BCEDD6788C3F27&feature=view_all To watch all Programming Interview Questions visit http://www.youtube.com/playlist?list=PLD629C50E1A85BF84&feature=view_all To learn about Pointers in C visit http://www.youtube.com/playlist?list=PLC68607ACFA43C084&feature=view_all To learn C programming from IITian S.Saurabh visit http://www.youtube.com/playlist?list=PL3C47C530C457BACD&feature=view_all
Views: 36187 saurabhschool
Decoding Caesar Cypher by brute force
 
09:12
GET THE NEXT COURSE HERE: https://www.udemy.com/computational-thinking-in-python/?couponCode=90_OFF Its called Computational Thinking in Python Python program files and PDF manuals available FREE! at: http://techxellent.courses/p/python-fundamentals SOCIAL: MINDS: https://www.minds.com/SanjinDedic Facebook Page: https://www.facebook.com/RobotixAu/ LinkedIn: https://au.linkedin.com/in/sanjin-dedic-a028b9113 WEBSITES: Techxellent.com.au Robotix.com.au COURSE DESCRIPTION: What is Python and why is it important? Python is an interpreted text based general purpose programming language, which is a key requisite of the 7-10 Digital Technologies Curriculum. Python is also the only professional programming language that was designed with beginners in mind, it is intuitive and easy to use What are the student outcomes? Students learn about core concepts of programming: branching, iteration and functions. They apply these to create four applications which perform the following: Simulation of an intelligent conversation User Authentication using passwords and/or secret questions A game where user guesses a number and the program informs the user of his accuracy over time A program that encrypts and decrypts messages using the Caesar Cypher What is the educational approach of the course? The course explicitly teaches the concepts such as loops or functions, performing several examples in the interactive shell. Then these concepts are employed to create a computer program these programs progress in their level of difficulty, eventually performing complex tasks like encryption Beyond the concepts and applications students will also learn the following skills: Creating algorithms which can be represented in the form of flowcharts, which are in turn easy to translate to code. Building programs in separate stages each of which can be tested Getting insight and understanding from error messages -~-~~-~~~-~~-~- Latest and Best Arduino Playlist in Collaboratio with DFRobot: https://www.youtube.com/playlist?list=PL_92WMXSLe_86NTWf0nchm-EmQIwccEye -~-~~-~~~-~~-~-
Views: 756 Robotix
The Zipf Mystery
 
21:05
The of and to. A in is I. That it, for you, was with on. As have ... but be they. RELATED LINKS AND SOURCES BELOW! http://www.twitter.com/tweetsauce http://www.instagram.com/electricpants WordCount.org http://www.wordcount.org/ How many days have you been alive? http://www.beatcanvas.com/daysalive.asp random letter generator: http://www.dave-reed.com/Nifty/randSeq.html Dictionary of Obscure Sorrows: https://www.youtube.com/user/obscuresorrows Word frequency resources: [lemmatized] https://en.wikipedia.org/wiki/Most_common_words_in_English http://www.uow.edu.au/~dlee/corpora.htm http://www.wordfrequency.info http://www.anc.org/data/anc-second-release/frequency-data/ http://www.titania.bham.ac.uk/docs/ http://www.kilgarriff.co.uk/bnc-readme.html#raw https://en.wiktionary.org/wiki/Wiktionary:Frequency_lists http://ucrel.lancs.ac.uk/bncfreq/ [PDF] http://www.wordfrequency.info/files/entries.pdf [combined Wikipedia and Gutenberg] http://www.monlp.com/2012/04/16/calculating-word-and-n-gram-statistics-from-a-wikipedia-corpora/ http://corpus.byu.edu/coca/files/100k_samples.txt http://corpus.byu.edu/ http://corpus.leeds.ac.uk/list.html https://books.google.co.uk/books?id=ja1_AAAAQBAJ&dq=word+frequency+coca&lr= http://www.ling.helsinki.fi/kit/2009s/clt231/NLTK/book/ch01-LanguageProcessingAndPython.html Great Zipf's law papers: http://colala.bcs.rochester.edu/papers/piantadosi2014zipfs.pdf http://www.ling.upenn.edu/~ycharles/sign708.pdf http://arxiv.org/pdf/cond-mat/0412004.pdf http://www-personal.umich.edu/~mejn/courses/2006/cmplxsys899/powerlaws.pdf Zipf’s law articles and discussions: http://www.theatlantic.com/magazine/archive/2002/04/seeing-around-corners/302471/ http://io9.com/the-mysterious-law-that-governs-the-size-of-your-city-1479244159?utm_expid=66866090-48.Ej9760cOTJCPS_Bq4mjoww.0 https://plus.maths.org/content/os/latestnews/may-aug08/food/index http://judson.blogs.nytimes.com/2009/05/19/math-and-the-city/?em https://plus.maths.org/content/mystery-zipf?src=aop http://www.datasciencecentral.com/profiles/blogs/why-zipf-s-law-explains-so-many-big-data-and-physics-phenomenons https://en.wikipedia.org/wiki/Zipf%27s_law https://books.google.co.uk/books?id=f8GrzlnMSm8C&pg=PA62&redir_esc=y#v=onepage&q&f=false http://arxiv.org/pdf/0802.4393v1.pdf http://www.pnas.org/content/108/9/3526.full http://lewisdartnell.com/language_page.htm http://wugology.com/zipfs-law/ other Zipf’s law PDFs http://ftp.iza.org/dp3928.pdf http://arxiv.org/pdf/1402.2965.pdf http://arxiv.org/pdf/1104.3199.pdf http://www.lel.ed.ac.uk/~jim/zipfjrh.pdf http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2834740/#pone.0009411-Mandelbrot1 http://polymer.bu.edu/hes/articles/pgs02a.pdf in untranslated language: http://arxiv.org/pdf/0808.2904.pdf http://pages.stern.nyu.edu/~xgabaix/papers/zipf.pdf http://www.hpl.hp.com/research/idl/papers/ranking/ranking.html http://statweb.stanford.edu/~owen/courses/306a/ZipfAndGutenberg.pdf http://arxiv.org/pdf/1310.0448v3.pdf http://www.kornai.com/Papers/glotto5.pdf Zipf’s law slides: http://www.slideshare.net/guest9fc47a/nlp-new-words Pareto Principle and related ‘laws’: http://www.squawkpoint.com/2013/03/pareto-principle/ http://billyshall.com/blog/post/paretos-principle https://en.wikipedia.org/wiki/Pareto_principle Random typing and Zipf: http://www.longtail.com/the_long_tail/2006/09/is_zipfs_law_ju.html health 80/20: http://archive.ahrq.gov/research/findings/factsheets/costs/expriach/expriach1.html Principle of least effort: https://en.wikipedia.org/wiki/Principle_of_least_effort https://en.wikipedia.org/wiki/Satisficing http://www.pnas.org/content/100/3/788.full.pdf [PDF] http://csiss.org/classics/content/99 self organized criticality: http://journal.frontiersin.org/article/10.3389/fnsys.2014.00166/full Hapax Legomenon: http://campus.albion.edu/english/2011/02/15/hapax-legomenon/ http://www.dailywritingtips.com/is-that-a-hapax-legomenon/ https://en.wikipedia.org/wiki/Hapax_legomenon [PDF] http://www.aclweb.org/anthology/J10-4003 http://www.wired.com/2012/01/hapax-legomena-and-zipfs-law/ http://oed.hertford.ox.ac.uk/main/content/view/402/450/index.html#_ftn1 http://oed.hertford.ox.ac.uk/main/content/view/36/166/index.html Learning curve: https://en.wikipedia.org/wiki/Learning_curve Forgetting curve: http://www.trainingindustry.com/wiki/entries/forgetting-curve.aspx https://en.wikipedia.org/wiki/Forgetting_curve Experience curve effects: https://en.wikipedia.org/wiki/Experience_curve_effects Forgetting and zipf's law: http://act-r.psy.cmu.edu/wordpress/wp-content/uploads/2012/12/37JRA_LS_PS_1991.pdf http://public.psych.iastate.edu/shacarp/Wixted_Carpenter_2007.pdf http://marshalljonesjr.com/youll-remember-less-than-001-of-your-life/ https://en.wikipedia.org/wiki/Forgetting https://www.reddit.com/r/Showerthoughts/comments/3gu9qk/it_only_takes_three_generations_for_you_to_be/ music from: http://www.youtube.com/jakechudnow http://www.audionetwork.com
Views: 13844684 Vsauce
3rd BIU Winter School on Cryptography: Broadcast encryption and traitor tracing - Dan Boneh
 
59:32
The 3rd Bar-Ilan Winter School on Cryptography: Bilinear Pairings in Cryptography, which was held between February 4th - 7th, 2013. The event's program: http://crypto.biu.ac.il/winterschool2013/schedule2013.pdf For All 2013 Winter school Lectures: http://www.youtube.com/playlist?list=PLXF_IJaFk-9C4p3b2tK7H9a9axOm3EtjA&feature=mh_lolz Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 1485 barilanuniversity
The Halting Problem - An Impossible Problem to Solve
 
07:37
Start learning today with SkillShare: https://skl.sh/upandatom2 Alan Turing proved that the Halting Problem was impossible for Turing machines (computers) to solve. Come find out how. The quantum computer game I talked about: https://phys.cam/game/ This video was co-written by my super smart hubby Simon Mackenzie. Hi! I'm Jade. Subscribe to Up and Atom for new physics, math and computer science videos every two weeks! *SUBSCRIBE TO UP AND ATOM* https://www.youtube.com/c/upandatom *Follow me: @upndatom TWITTER: https://twitter.com/upndatom?lang=en INSTAGRAM: https://www.instagram.com/upndatom/ Check out this PlayList for a taste of the channel: https://www.youtube.com/playlist?list=PL1lNrW4e0G8X4y21O6ALA11VN8afFCTn7 A big thank you to my AMAZING PATRONS! Paul Kendra, Harsh Tank, Alan McNea, Daniel Tan-Holmes, Simon Mackenzie, Yoseph, Andrew Pann, Dave, Anne Tan, Ayan Doss, Marc Watkins, Sung-Ho Lee, Todd Loreman, David, Susan Jones, M.H. Beals, Doug Cowles, Stephen Veitch, Renato Pereira, Simon Dargaville, Dean Madden, Noah McCann, Robert Frieske, Magesh. If you'd like to consider supporting Up and Atom, head over to my Patreon page :) https://www.patreon.com/upandatom For a one time donation, head over to my PayPal :) https://www.paypal.me/upandatom Other videos you might like: What is the Schrödinger Equation, Exactly? https://youtu.be/QeUMFo8sODk What is a Singularity, Exactly? https://youtu.be/NLQNBfI97Ck Y CN U R34D DIS? https://youtu.be/_PG-jJKB_do *Sources* https://www.cs.virginia.edu/~robins/Turing_Paper_1936.pdf http://index-of.co.uk/Theory-of-Computation/Charles_Petzold-Annotated_Turing-Wiley(2008).pdf https://www.huffingtonpost.com/entry/how-to-describing-alan-turings-halting-problem-to_us_58d1ae08e4b062043ad4add7 *Music* https://www.epidemicsound.com/
Views: 67504 Up and Atom
3rd BIU Winter School on Cryptography: The Discrete Log Problem on Elliptic Curves - Nigel Smart
 
01:15:28
The 3rd Bar-Ilan Winter School on Cryptography: Bilinear Pairings in Cryptography, which was held between February 4th - 7th, 2013. The event's program: http://crypto.biu.ac.il/winterschool2013/schedule2013.pdf For All 2013 Winter school Lectures: http://www.youtube.com/playlist?list=PLXF_IJaFk-9C4p3b2tK7H9a9axOm3EtjA&feature=mh_lolz Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 1730 barilanuniversity
What's Up With Group Messaging? - Computerphile
 
10:50
Why encrypted group messaging isn't as secure as point to point. Dr Mike Pound explains this ongoing problem. Instant Messaging & the Signal Protocol: https://youtu.be/DXv1boalsDI Double Ratchet Messaging Encryption: https://youtu.be/9sO2qdTci-s Relevant paper: https://eprint.iacr.org/2017/666.pdf https://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: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 181119 Computerphile
3rd BIU Winter School on Cryptography: The basics of elliptic curves - Nigel Smart
 
01:20:28
The 3rd Bar-Ilan Winter School on Cryptography: Bilinear Pairings in Cryptography, which was held between February 4th - 7th, 2013. The event's program: http://crypto.biu.ac.il/winterschool2013/schedule2013.pdf For All 2013 Winter school Lectures: http://www.youtube.com/playlist?list=PLXF_IJaFk-9C4p3b2tK7H9a9axOm3EtjA&feature=mh_lolz Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 5485 barilanuniversity
Hashing with DSA Using Python - Cryptography with Python
 
04:10
This tutorial explains how to create a hash of a text using DSA.
Views: 151 ma academy
Caesar Cypher Algorithm (flowchart + process explanation)
 
05:58
Python program files and PDF manuals available FREE! at: https://techxellent.courses/p/python-fundamentals-all-moudules/?product_id=519981&coupon_code=FREE SOCIAL: MINDS: https://www.minds.com/SanjinDedic Facebook Page: https://www.facebook.com/RobotixAu/ LinkedIn: https://au.linkedin.com/in/sanjin-dedic-a028b9113 WEBSITES: Techxellent.com.au Robotix.com.au COURSE DESCRIPTION: What is Python and why is it important? Python is an interpreted text based general purpose programming language, which is a key requisite of the 7-10 Digital Technologies Curriculum. Python is also the only professional programming language that was designed with beginners in mind, it is intuitive and easy to use What are the student outcomes? Students learn about core concepts of programming: branching, iteration and functions. They apply these to create four applications which perform the following: Simulation of an intelligent conversation User Authentication using passwords and/or secret questions A game where user guesses a number and the program informs the user of his accuracy over time A program that encrypts and decrypts messages using the Caesar Cypher What is the educational approach of the course? The course explicitly teaches the concepts such as loops or functions, performing several examples in the interactive shell. Then these concepts are employed to create a computer program these programs progress in their level of difficulty, eventually performing complex tasks like encryption Beyond the concepts and applications students will also learn the following skills: Creating algorithms which can be represented in the form of flowcharts, which are in turn easy to translate to code. Building programs in separate stages each of which can be tested Getting insight and understanding from error messages -~-~~-~~~-~~-~- Latest and Best Arduino Playlist in Collaboratio with DFRobot: https://www.youtube.com/playlist?list=PL_92WMXSLe_86NTWf0nchm-EmQIwccEye -~-~~-~~~-~~-~-
Views: 816 Robotix
Part-18 | Cyclic group generator element in hindi how to find generating element with example group
 
08:17
• Counselling Guruji is our latest product & a well-structured program that answers all your queries related to Career/GATE/NET/PSU’s/Private Sector etc. You can register for the program at: https://goo.gl/forms/ZmLB2XwoCIKppDh92 You can check out the brochure at: https://www.google.com/url?q=http://www.knowledgegate.in/guruji/counselling_guruji_brochure.pdf&sa=D&ust=1553069285684000&usg=AFQjCNFaTk4Pnid0XYyZoDTlAtDPUGcxNA • Link for the complete playlist of Discrete Mathematics is: Relations:https://www.youtube.com/playlist?list=PLmXKhU9FNesTpQNP_OpXN7WaPwGx7NWsq Graph Theory: https://www.youtube.com/playlist?list=PLmXKhU9FNesS7GpOddHDX3ZCl86_cwcIn Group Theory: https://www.youtube.com/playlist?list=PLmXKhU9FNesQrSgLxm6zx3XxH_M_8n3LA Proposition:https://www.youtube.com/playlist?list=PLmXKhU9FNesQxcibunbD82NTQMBKVUO1S Set Theory: https://www.youtube.com/playlist?list=PLmXKhU9FNesTSqP8hWDncxpCj8a4uzmu7 • Links for the books that we recommend for Discrete Mathematics are: 1. Discrete Mathematics and Its Applications (Writer: Kenneth Rosen) (Publisher: McGraw Hill Education) https://amzn.to/2NV9viK 2. Graph Theory with Applications to Engineering and Computer Science (Writer: Deo Narsingh) (Publisher: Phi) https://amzn.to/2NSiwcc • Check out our website http://www.knowledgegate.in/ • Please spare some time and fill this form so that we can know about you and what you think about us: https://goo.gl/forms/b5ffxRyEAsaoUatx2 • Your review/recommendation and some words can help validating our quality of content and work so Please do the following: - 1) Give us a 5 star review with comment on Google https://goo.gl/maps/sLgzMX5oUZ82 2) Follow our Facebook page and give us a 5 star review with comments https://www.facebook.com/pg/knowledgegate.in/reviews 3) Follow us on Instagram https://www.instagram.com/mail.knowledgegate/ 4) Follow us on Quora https://www.quora.com/profile/Sanchit-Jain-307 • Links for Hindi playlists of other Subjects are: DBMS: https://www.youtube.com/playlist?list=PLmXKhU9FNesR1rSES7oLdJaNFgmuj0SYV TOC: https://www.youtube.com/playlist?list=PLmXKhU9FNesSdCsn6YQqu9DmXRMsYdZ2T OS: https://www.youtube.com/playlist?list=PLmXKhU9FNesSFvj6gASuWmQd23Ul5omtD Digital Electronics: https://www.youtube.com/playlist?list=PLmXKhU9FNesSfX1PVt4VGm-wbIKfemUWK Data Structures: https://www.youtube.com/playlist?list=PLmXKhU9FNesRRy20Hjr2GuQ7Y6wevfsc5 Computer Networks: https://www.youtube.com/playlist?list=PLmXKhU9FNesSjFbXSZGF8JF_4LVwwofCd Algorithm: https://www.youtube.com/playlist?list=PLmXKhU9FNesQJ3rpOAFE6RTm-2u2diwKn • About this video: In this video you’ll be learning about cyclic groups and generator elements in group theory. This video discusses the basic definition and also various examples which will be helping you in solving these most frequently asked questions in GATE. Notes: Generator or Generating Elements: On a group (G, *), an element ‘a’ is called as a generator if, a ϵ G and ∀ a ϵ G can be represented using power of a {a1, a2, …an}, *. Cyclic Group: A group (G, *) is said to be a cyclic group if it contains at least one generator element. Practice Problems Find which elements are generators in the following questions. 1. {1,3,5,7},×3 2. {2,5,7,9}, +4 cyclic group abstract algebra, cyclic group in algebra, cyclic group in group theory, cyclic group multiplication, cyclic group and generators, cyclic group example, cyclic group properties, cyclic group in mathematics, cyclic group in hindi, cyclic group algebra, cyclic group and subgroup, cyclic group and abelian group, cyclic group addition, cyclic group is abelian proof, cyclic group khan academy, a cyclic group is abelian, cyclic group by sanchit jain, cyclic group definition abstract algebra, cyclic group definition, cyclic group discrete mathematics, cyclic group definition math, define cyclic group, cyclic group example problems pdf, cyclic group explanation, generator of cyclic group example, finite cyclic group example, define cyclic group with example, prove every cyclic group is abelian, finite cyclic group, cyclic group generator, knowledge gate cyclic group, cyclic group hindi, cyclic group in modern algebra, cyclic group by jaipal, cyclic group multiplication table, cyclic group meaning, cyclic group math, cyclic group modulo n, discrete mathematics cyclic group, cyclic group notation, cyclic group nptel, cyclic group number of generators, cyclic group of prime order, cyclic group of order 3, cyclic group of order 2, cyclic group of order 6, cyclic group of order 12, cyclic group of order 4, cyclic group of prime order p, cyclic group of order n, cyclic group prime order, cyclic group pdf, group theory nptel, group theory in hindi, group theory mathematics in hindi, group theory iit jam, group theory mit, group theory lectures, group nptel, group theory mathematics nptel, group theory algebra, group theory alok sir, group theory and algebra, group theory,
Views: 57507 KNOWLEDGE GATE
3rd BIU Winter School on Cryptography: Attribute-Based Encryption - Allison Bishop Lewko
 
01:50:16
The 3rd Bar-Ilan Winter School on Cryptography: Bilinear Pairings in Cryptography, which was held between February 4th - 7th, 2013. The event's program: http://crypto.biu.ac.il/winterschool2013/schedule2013.pdf For All 2013 Winter school Lectures: http://www.youtube.com/playlist?list=PLXF_IJaFk-9C4p3b2tK7H9a9axOm3EtjA&feature=mh_lolz Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 4390 barilanuniversity
3rd BIU Winter School on Cryptography: How Pairings Work - Florian Hess
 
01:34:21
The 3rd Bar-Ilan Winter School on Cryptography: Bilinear Pairings in Cryptography, which was held between February 4th - 7th, 2013. The event's program: http://crypto.biu.ac.il/winterschool2013/schedule2013.pdf For All 2013 Winter school Lectures: http://www.youtube.com/playlist?list=PLXF_IJaFk-9C4p3b2tK7H9a9axOm3EtjA&feature=mh_lolz Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 1145 barilanuniversity
3rd BIU Winter School on Cryptography: Applications of Elliptic Curves to Cryptography - Nigel Smart
 
01:14:33
The 3rd Bar-Ilan Winter School on Cryptography: Bilinear Pairings in Cryptography, which was held between February 4th - 7th, 2013. The event's program: http://crypto.biu.ac.il/winterschool2013/schedule2013.pdf For All 2013 Winter school Lectures: http://www.youtube.com/playlist?list=PLXF_IJaFk-9C4p3b2tK7H9a9axOm3EtjA&feature=mh_lolz Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 1460 barilanuniversity
Programming Interviews: Primality Testing: Randomized Algorithm
 
10:05
This video lecture is produced by IITian S.Saurabh. He is B.Tech from IIT and MS from USA. How will you find if a number is prime. Can you suggest a randomized algorithm to find if a number is prime. This channel is an ultimate guide to prepare for job interviews for software engineers, software test engineers, computer scientists, engineering students specially computer science and IT engineers, Master of computer application (MCA) and Bachelor of Computer Application (BCA) students. The content of this channel will help students prepare for C,C++, Java, data structures and algorithms. It also covers courses related to networking and database. This channel can be used by students of NIIT, IGNOU etc too. tags: "find repeated element", "randomized algorithms","randomized algorithms example","randomized algorithms ppt", "randomized algorithms pdf","repeated element in an array","primality testing fermat","primality testing fermat's little theoram","fermat's theoram primality testing","primality testing using fermat's little theoram"
Views: 14656 saurabhschool
Network Security Attack - 4 - Types Of Attack - Active & Passive Attack in Urdu/Hindi
 
06:36
Network Security Attack in hindi in network security is explained in detail with examples..! security attacks are common in network security, which makes it important to understand the security attack in network security, security attacks in hindi and urdu language, security attack in cryptography is also explained in this lecture. security attack and types are described completely in this network security tutorial. types are active passive attack, this video defines active and passive attack in network security in hindi , active and passive attacks in information security is also described with examples, difference between active and passive attack is explained in very simple language. active and passive attacks in cryptography are very important topic, security attacks in cryptography are decribed using cyber security attack scenarios. short note on security attacks can be taken from this video. which contain list of types of cyber attacks, cyber security attack vectors, and classification of attacks in network security. types of attacks in network security pdf can be prepared on demand. Contents: Security Attack -Passive attacks --Release of message contents --Traffic analysis Active attacks -Masquerade -Replay -Modification Of Messages -Denial Of Service
Views: 34 Bytefeast
LEO: Scheduling Mobile Sensing Algorithms - 1 min intro
 
01:01
The video of our MobiCom 2016 paper "LEO: Scheduling Sensor Inference Algorithms across Heterogeneous Mobile Processors and Network Resources" http://www.cl.cam.ac.uk/~pig20/leo.pdf
Views: 391 Petko Georgiev
Quantum Cryptography Explained
 
08:13
This episode is brought to you by Squarespace: http://www.squarespace.com/physicsgirl With recent high-profile security decryption cases, encryption is more important than ever. Much of your browser usage and your smartphone data is encrypted. But what does that process actually entail? And when computers get smarter and faster due to advances in quantum physics, how will encryption keep up? http://physicsgirl.org/ ‪http://twitter.com/thephysicsgirl ‪http://facebook.com/thephysicsgirl ‪http://instagram.com/thephysicsgirl http://physicsgirl.org/ Help us translate our videos! http://www.youtube.com/timedtext_cs_panel?c=UC7DdEm33SyaTDtWYGO2CwdA&tab=2 Creator/Editor: Dianna Cowern Writer: Sophia Chen Animator: Kyle Norby Special thanks to Nathan Lysne Source: http://gva.noekeon.org/QCandSKD/QCand... http://physicsworld.com/cws/article/n... https://epic.org/crypto/export_contro... http://fas.org/irp/offdocs/eo_crypt_9... Music: APM and YouTube
Views: 278888 Physics Girl
Math Magic
 
19:31
Links to sources, more math magic, and other cool things below! My Twitter: http://www.twitter.com/tweetsauce My Instagram: http://www.instagram.com/electricpants Thanks to Vanessa from BrainCraft! Check out her channel: https://www.youtube.com/user/braincraftvideo Matt Parker's standupmaths channel: https://www.youtube.com/user/standupmaths Matt's video I mention: https://www.youtube.com/watch?v=aNpGxZ_1KXU STEMMathsMagic channel: https://www.youtube.com/user/STEMMathsMagic The STEMMathsMagic video I reference: https://www.youtube.com/watch?v=r-LO8zQ9eTs STEMMathsMagic website (check out the manual!): http://www.mathematicalmagic.com/thetricks.html mismag is amazing. He introduced me to MANY self-working mathematical tricks. Please check him out! https://www.youtube.com/user/mismag822 MUSIC in this episode is from: Jake Chudnow: https://www.youtube.com/user/jakechudnow zach mccoy: https://zachmccoy.bandcamp.com/ audionetwork: http://www.audionetwork.com Shakespeare and Psalm 46: https://en.wikipedia.org/wiki/Psalm_46 http://www.umsl.edu/~thomaskp/sbible.htm https://www.apologeticspress.org/apcontent.aspx?category=13&article=925 Paper about which cards people think of most frequently (and more): http://www2.psych.ubc.ca/~rensink/publications/download/Cards-OAR.pdf 52 factorial explained by Scott Czepiel: http://czep.net/weblog/52cards.html Some good math magic articles: http://www.maa.org/community/maa-columns/past-columns-card-colm/low-down-triple-dealing http://www.futilitycloset.com/2015/06/25/color-scheme/ http://www.maa.org/external_archive/columns/colm/cardcolm200504.html http://www.ams.org/samplings/feature-column/fcarc-mulcahy5 http://mathforum.org/library/drmath/view/60379.html
Views: 8501737 Vsauce
How WanaCrypt Encrypts Your Files - Computerphile
 
17:22
Wanacrypt works super fast and even when you're offline. Dr Pound explains how hybrid ransomware systems work. Original Wana Decrypt0r video: https://youtu.be/88jkB1V6N9w The Perfect Code: https://youtu.be/WPoQfKQlOjg 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: 270494 Computerphile
Breaking ECDSA (Elliptic Curve Cryptography) - rhme2 Secure Filesystem v1.92r1 (crypto 150)
 
08:19
We are going to recover a ECDSA private key from bad signatures. Same issue the Playstation 3 had that allowed it to be hacked. -=[ 🔴 Stuff I use ]=- → Microphone:* https://amzn.to/2LW6ldx → Graphics tablet:* https://amzn.to/2C8djYj → Camera#1 for streaming:* https://amzn.to/2SJ66VM → Lens for streaming:* https://amzn.to/2CdG31I → Connect Camera#1 to PC:* https://amzn.to/2VDRhWj → Camera#2 for electronics:* https://amzn.to/2LWxehv → Lens for macro shots:* https://amzn.to/2C5tXrw → Keyboard:* https://amzn.to/2LZgCFD → Headphones:* https://amzn.to/2M2KhxW -=[ ❤️ Support ]=- → per Video: https://www.patreon.com/join/liveoverflow → per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ 🐕 Social ]=- → Twitter: https://twitter.com/LiveOverflow/ → Website: https://liveoverflow.com/ → Subreddit: https://www.reddit.com/r/LiveOverflow/ → Facebook: https://www.facebook.com/LiveOverflow/ -=[ 📄 P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm. #CTF #Cryptography
Views: 32663 LiveOverflow
What is Crypto Currency in Hindi by CryptoCurrencyCare CCC  By Kartike Kanwar
 
03:30
Crypto Currency Hindi CryptoCurrencyCare CCC By Kartike Kanwar Learn all about CryptoCurrency. Visit - CryptoCurrencyCare.com The Complete Support System For All Crypto Lovers What is Cryptocurrency ? Why its future of Money? What is Bitcoin? What are altcoins? Which are genuine currencies? How to do Mining? Is Mining id profitable? In which coin we should Invest? Many more Crypto Currency Care Crypto Currency CryptoCurrency AsiaDigiCoin AsiaDigi Coin ADCN Bitcoin bitcoin India Bitcoin online business review Bitcoin Presentation Bitcoin Business Plan Gain Bitcoin GainBitco.in The Bitcoin Decoded Bitcoin decoded Onecoin utoken ufun gcr Global Coin reserve coindesk cryptocurrency satoshi nakamoto satoshi btc xbt cryptograph gemcoin litecoin altcoin dogecoin Gainbitco india Amit Jaiswal Kartike Kanwar Kartike Bitcoin Kartike Kanwar bitcoin guru coinpedia cryptocurrency list cryptocurrency meaning cryptocurrency ppt cryptocurrency mining cryptocurrency market cap cryptocurrency in india cryptocurrency onecoin cryptocurrency exchange cryptocurrency news cryptocurrency pdf cryptocurrency bitcoin cryptocurrency and bitcoin cryptocurrency address cryptocurrency and blockchain cryptocurrency api cryptocurrency advantages and disadvantages cryptocurrency australia cryptocurrency algorithms a cryptocurrency exchange cryptocurrency a good investment create a cryptocurrency creating a cryptocurrency exchange create a cryptocurrency wallet build a cryptocurrency miner cryptocurrency business cryptocurrency blockchain cryptocurrency business plan cryptocurrency benefits cryptocurrency blog cryptocurrency book cryptocurrency bank cryptocurrency cloud mining cryptocurrency creator cryptocurrency conclusion cryptocurrency course cryptocurrency companies list cryptocurrency charts live cryptocurrency disadvantages cryptocurrency difficulty cryptocurrency dao cryptocurrency degree cryptocurrency day trading cryptocurrency exchange rates cryptocurrency exchange india cryptocurrency explained cryptocurrency exchange script cryptocurrency exchange platform cryptocurrency examples cryptocurrency ethereum cryptocurrency etf cryptocurrency exchange reviews usd-e cryptocurrency e-commerce cryptocurrency cryptocurrency future cryptocurrency forums cryptocurrency for dummies cryptocurrency faucet cryptocurrency fund cryptocurrency for beginners cryptocurrency hindi cryptocurrency history cryptocurrency how it works cryptocurrency hashing algorithms cryptocurrency hack cryptocurrency hardware cryptocurrency historical prices cryptocurrency hedge fund cryptocurrency in hindi cryptocurrency investment cryptocurrency images cryptocurrency introduction cryptocurrency in mlm cryptocurrency investopedia cryptocurrency is legal in india cryptocurrency jobs cryptocurrency journal cryptocurrency japan cryptocurrency jobs london cryptocurrency jobs australia cryptocurrency kickstarter cryptocurrency kit cryptocurrency kinds cryptocurrency keys cryptocurrency list 2016 cryptocurrency legality cryptocurrency list 2015 cryptocurrency list onecoin cryptocurrency list values cryptocurrency litecoin cryptocurrency login cryptocurrency listed companies cryptocurrency logos cryptocurrency mining explained cryptocurrency meaning in telugu cryptocurrency mining hardware cryptocurrency mining software cryptocurrency mining algorithms cryptocurrency mlm cryptocurrency meaning in tamil cryptocurrency news 2016 cryptocurrency network marketing cryptocurrency names cryptocurrency network cryptocurrency node cryptocurrency next big thing cryptocurrency news app cryptocurrency new coins cryptocurrency nedir scrypt n cryptocurrency cryptocurrency other than bitcoin cryptocurrency on the rise cryptocurrency open source cryptocurrency overview cryptocurrency offline vault storage system cryptocurrency origin cryptocurrency oxford dictionary cryptocurrency options cryptocurrency ppt download cryptocurrency prices cryptocurrency presentation cryptocurrency portfolio cryptocurrency predictions cryptocurrency profitability cryptocurrency quotes cryptocurrency questions cryptocurrency rates cryptocurrency reviews cryptocurrency regulation cryptocurrency ripple cryptocurrency revolution cryptocurrency risk cryptocurrency report cryptocurrency seminar ppt cryptocurrency scams cryptocurrency stock cryptocurrency startups cryptocurrency stock market cryptocurrency trading cryptocurrency trading platform cryptocurrency trading tips cryptocurrency tutorial cryptocurrency types cryptocurrency trading guide cryptocurrency uk cryptocurrency usd cryptocurrency university cryptocurrency update cryptocurrency values cryptocurrency vs fiat currency cryptocurrency vs virtual currency cryptocurrency video cryptocurrency worth mining cryptocurrency without blockchain cryptocurrency youtube cryptocurrency 2016 cryptocurrency 2014 cryptocurrency 2015 cryptocurrency 2017 top 3 cryptocurrency cryptocurrency wallet cryptocurrency exchange cryptocurrency top 5 top 5 cryptocurrency
Views: 43396 CAPTAIN RICHMIND
C# 6.0 Tutorial - Advanced - 59. How to Verifies DSA - Digital Signature Algorithm
 
06:45
Learn more free at my blog http://www.manuelradovanovic.com If you have any question please feel free to ask. Subscribe me on YouTube, please! Thank You!
Views: 682 Manuel Radovanovic
Steemit - The Billion Dollar Social Media Giant Replacing Reddit & Facebook
 
23:45
Follow me on Steemit https://steemit.com/@davidhay https://steem.io/SteemWhitePaper.pdf https://www.alexa.com/siteinfo/steemit.com Active Nodes https://status.steemnodes.com/ Steem Dolllars - A more stable form of cryptocurrency that shows the problem with cryptocurrency. https://coinmarketcap.com/currencies/steem-dollars/ Delegated proof of stake (no mining) 20 full time witnesses with a list of backups. Witnesses get paid in steam power for each block they create. https://steamstat.us/ Full BITUSD video https://www.youtube.com/watch?v=YD8i2Py9Paw Example of ranking algorithm incentives copying rather than creating. https://steemit.com/@crypto-p
Views: 47265 David Hay
3rd BIU Winter School on Cryptography:The Basics of Pairings - Dan Boneh
 
01:14:45
The 3rd Bar-Ilan Winter School on Cryptography: Bilinear Pairings in Cryptography, which was held between February 4th - 7th, 2013. The event's program: http://crypto.biu.ac.il/winterschool2013/schedule2013.pdf For All 2013 Winter school Lectures: http://www.youtube.com/playlist?list=PLXF_IJaFk-9C4p3b2tK7H9a9axOm3EtjA&feature=mh_lolz Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 8194 barilanuniversity
Reading Excerpts from Krishnamurti's 'Education and the Significance of Life' -- ASMR -- Soft-Spoken
 
01:30:33
Education And The Significance Of Life (pdf) https://www.holybooks.com/wp-content/uploads/J-Krishnamurti-Education-and-the-Significance-of-life.pdf ***SUPPORT*** SUPPORT through Patreon: https://www.patreon.com/chycho You can also make direct donation through Paypal at: https://www.paypal.me/chycho As well as supporting this work through Cryptocurrencies: Bitcoin (BTC): 1Peam3sbV9EGAHr8mwUvrxrX8kToDz7eTE Bitcoin Cash (BCH): 18KjJ4frBPkXcUrL2Fuesd7CFdvCY4q9wi Ethereum (ETH): 0xcec12da3d582166afa8055137831404ea7753ffd Ethereum Classic (ETC): 0x348e8b9c0e7d71c32fb2a70dcabcb890b979441c Litecoin (LTC): LLak2kfmtqoiQ5X4zhdFpwMvkDNPa4UhGA Dash (DSH): XmHxibwbUW9MRu2b1oHSrL951yoMU6XPEN ZCash (ZEC): t1S6G8gqmt6rWjh3XAyAkRLZSm9Fro93kAd Doge (DOGE): D83vU3XP1SLogT5eC7tNNNVzw4fiRMFhog Please let me know if there are any other Crypto's that you would like to use. Thank you for your support. Peace. chycho ***PLAYLISTS*** Education https://www.youtube.com/playlist?list=PL9sfzC9bUPxnl7t66QxdblLldYe_97loP ASMR - Autonomous Sensory Meridian Response https://www.youtube.com/playlist?list=PL9sfzC9bUPxnwlqICKHXy7lanHb4Vy0xl Whispering and Soft-Spoken Readings (ASMR) https://www.youtube.com/playlist?list=PL9sfzC9bUPxnvs9LFqnlitxdwtX1WJfmC My Vision (Business Model) https://www.youtube.com/playlist?list=PL9sfzC9bUPxkXZ5clOHITz4fIjZPlIXW7 Comic Books https://www.youtube.com/playlist?list=PL9sfzC9bUPxnxixuAMr-_mqJHaEFZ8ugb ASMR Math https://www.youtube.com/playlist?list=PL9sfzC9bUPxk8C_ZQHCjY5XrQS9SYkEBD Trigonometry https://www.youtube.com/playlist?list=PL9sfzC9bUPxmSHtqSPAHfjNYu0OpIFWhp The Language of Mathematics https://www.youtube.com/playlist?list=PLFA0678B6777BA250 Math in Real Life https://www.youtube.com/playlist?list=PLE313AE0850B34951 How to Study https://www.youtube.com/playlist?list=PL9sfzC9bUPxllvFO3yJEI3Yt_GrroR882 ICOs and Cryptocurrencies https://www.youtube.com/playlist?list=PL9sfzC9bUPxmmMlvWucH0BsCnNhZjMKY0 Personal Finance https://www.youtube.com/playlist?list=PL9sfzC9bUPxlEbr7eqP8H8rqGSXono-9W Food https://www.youtube.com/playlist?list=PL9sfzC9bUPxmGPa6kjbtCkjFxPqT62E-O Reading Comics https://www.youtube.com/playlist?list=PL9sfzC9bUPxk-dxeDJMeZBgXUqcnJlHd1 Politics/Economics https://www.youtube.com/playlist?list=PL428D448DDF6F6150 Games https://www.youtube.com/playlist?list=PL3D8F8D607D46726E Backgammon https://www.youtube.com/playlist?list=PL9sfzC9bUPxmnpQCIWhkInx4SIk1craYM Show and Tell (Collections) https://www.youtube.com/playlist?list=PL9sfzC9bUPxnNCawhkOgbat2Emc09qXxP Beards https://www.youtube.com/playlist?list=PL3BE5BA1835DF9819 Music: https://www.youtube.com/playlist?list=PL3A91A1E32AC88A3C How to Make Crab Apple Butter, Crabapple Spread https://www.youtube.com/playlist?list=PL9sfzC9bUPxkvKlhVE1-R8Q1Cpox4V2ax Food https://www.youtube.com/playlist?list=PL9sfzC9bUPxmGPa6kjbtCkjFxPqT62E-O How to Eat Pomegranates https://www.youtube.com/playlist?list=PL9sfzC9bUPxngqSUawyN-ih7OixNPTgEH In Conversation with chycho: Q&A https://www.youtube.com/playlist?list=PL9sfzC9bUPxm7w9P9m9kmbNy05abYpe4f ***Additional Math Channels*** Math in Real Life (www.mathinreallife.com) https://www.youtube.com/user/mathinreallife 420math (www.420math.com) https://www.youtube.com/user/420math420math ***Additional Articles*** "For the ASMR Community: Extended Cuts of Picking My Beard" http://chycho.blogspot.ca/2013/01/for-asmr-community-extended-cuts-of.html Articles on Mathematics - "Math Articles" http://chycho.blogspot.ca/2014/04/table-of-contents-main.html#TOCMath: Peace, chycho http://www.chycho.com .
Views: 4867 chycho