Today we use Python to identify prime numbers. This is important in cryptography and number theory. While it’s simple to make the function work, it’s hard to make it FAST. We’ll profile the function and look at several ways to improve the speed of our algorithm. Our Patrons on Patreon help us make our videos! We'd like to recognize our VIP Patron Vishal Shah whose generosity has made such a big difference for our channel. Thank you, Vishal! ➢➢➢➢➢➢➢➢➢➢ To learn Python, you can watch our playlist from the beginning: https://www.youtube.com/watch?v=bY6m6_IIN94&list=PLi01XoE8jYohWFPpC17Z-wWhPOSuh8Er- ➢➢➢➢➢➢➢➢➢➢ If you’d like a reference book, we recommend “Python Cookbook, 3rd Edition” from O’Reilly: http://amzn.to/2sCNYlZ The Mythical Man Month - Essays on Software Engineering & Project Management http://amzn.to/2tYdNeP ➢➢➢➢➢➢➢➢➢➢ To help us make videos more quickly, you can support Socratica at: Patreon: https://www.patreon.com/socratica Socratica Paypal: https://www.paypal.me/socratica We also accept Bitcoin! :) Our address is: 1EttYyGwJmpy9bLY2UcmEqMJuBfaZ1HdG9 Thank you!! ➢➢➢➢➢➢➢➢➢➢ You can also follow Socratica on: - Twitter: @socratica - Instagram: @SocraticaStudios - Facebook: @SocraticaStudios ➢➢➢➢➢➢➢➢➢➢ Python instructor: Ulka Simone Mohanty (@ulkam on Twitter) Written & Produced by Michael Harrison (@mlh496 on Twitter)
Views: 75465 Socratica
Back to School Special. This short series will discuss pseudo random number generators (PRNGs), look at how they work, some algorithms for PRNGs, and how they are used. Support Coding Math: http://patreon.com/codingmath Source Code: https://jsbin.com/nifutup/1/edit?js,output Earlier Source Code: http://github.com/bit101/codingmath
Views: 28611 Coding Math
THis is a really basic tutorial for getting prime numbers in java using a simple method with for loops. This will be fine for your homework since it doesn't have the "best permormance" but it'll work just fine. __________________ Thank you for watching this video, if you like it please don't forget to like it, or subscribe to my channel for more programming tutorials --- also visit my website for more content http://betacoding.net
Views: 125885 betacoding
This video is about 2 prime number generators. One of them is in C++ and the other one in Java. They accurately generate true prime numbers. If you have any suggestions for another generating algorithm or anything else, leave them in the comments below. Like and subscribe if you want to see more! Source Code: ▶C++ https://github.com/R-e-t-u-r-n-N-u-l-l/Prime-Numbers/blob/master/PrimeNumbers.cpp ▶Java https://github.com/R-e-t-u-r-n-N-u-l-l/Prime-Numbers/blob/master/PrimeNumbers.java Music: ▶ Randomly created by us Social media: ▶ Github: https://github.com/R-e-t-u-r-n-N-u-l-l
Views: 161 Return Null
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: 582479 Art of the Problem
Want a tutorial or video on a specific topic? Just comment below and I'll get back to you within 24 hours. :) Thanks! Revision: line 12 - Math.floor(Math.sqrt(i)) + 1) (needed to add 1) Don't forget to like, subscribe, and leave a comment!
Views: 163 AxiomaticUncertainty
RSA is an algorithm used by modern computers to encrypt and decrypt messages. Modern ecnryption is mostly based on this algorithm. It is an asymmetric cryptographic algorithm. Asymmetric means that there are two different keys. This is also called public key cryptography, because one of the keys can be given to anyone. The other key must be kept private. The algorithm is based on the fact that finding the factors of a large composite number is difficult: when the integers are prime numbers, the problem is called prime factorization. It is also a key pair (public and private key) generator. Website - http://dprogrammer.org Patreon - https://www.patreon.com/dani2442 Gmail - [email protected] Social Media: Facebook - https://www.facebook.com/dprogrammerlopez Twitter - https://twitter.com/DprogrammerL YouTube - https://www.youtube.com/channel/UCGtQKaX0CCefmNkCfpBGw_A LinkedIn - https://www.linkedin.com/in/daniel-lopez-0a5098173/ Pinterest - https://www.pinterest.es/daniellm2442123 Google+ - https://plus.google.com/u/0/106892447370946095732
Views: 393 dProgrammer lopez
An attempt at an optimal trial division primality test using the Sieve of Eratosthenes. Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/comp-number-theory/v/prime-number-theorem-the-density-of-primes?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/comp-number-theory/v/sieve-of-eratosthenes-prime-adventure-part-4?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: 15425 Khan Academy Labs
Views: 80 Pymmusic
SIEVE OF ERATOSTHENES This is one of the most efficient algorithm to find all prime numbers smaller than N . TIME COMPLEXITY : AVERAGE CASE : O(N) WORST CASE : O(N) where N is the number limit . Ex : I/P : n = 10 O/P : 2 3 5 7 **PROCEDURE** - Create a list / array of consecutive integers ( 2 to n ) - Initially , set p =2 , i.e a first prime number - Starting from p^2 , count up in increments of p and mark each of these numbers greater than or equal to p^2 . These numbers will be p(p+1) , p(p+2) …… - Find first number greater than p , that is not marked , if there was no such number , then stop . - After algo. is completed , the numbers that are marked as true are prime numbers . ** CODE ** # SIEVE OF ERATOSTHENES def soe(n): lists= lists=[True for i in range(n+1)] p=2 while(p*p(=n): # use greater than Symbol if(lists[p]==True): for k in range(p*p,n+1,p): lists[k]=False p+=1 for p in range(2,n+1): if(lists[p]): print(str(p)+" ",end='') print("SEIVE OF ERATOSTHENES ") print("COMPLEXITY : O(N) // APPROX ") print(" PRIME NUMBERS UPTO 100 ARE") soe(100) Practice : http://www.codeofgeeks.com/cp24 LIKE | SHARE | SUBSCRIBE
Views: 70 CODE OF GEEKS
RSA being a public key crypto-system has two keys, the Public key and the Private key. The Encryption is done using one and the decryption is done using the other. Normally, the encryption is done using the Public key and the decryption is done using the Private key. The RSA modulus (explained below) length is called the key length of the cipher. The currently largest factored prime number had 768 bit. As the security of RSA depends on the factoring problem, using a modulus of 1024 bits is a bare minimum. It is recommended to use at least 2048 bits for good security. 4096 bit is pretty much unbreakable, anything beyond 4096 bits is over the top and would also be painfully slow. #selfhostwcf, #p2pnetworkprogramming,#netcorecommerce
Views: 3400 Freelance Web Developments
Sieve of Eratosthenes allows us to generate a list of primes. Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/comp-number-theory/v/trial-division-primality-test-using-a-sieve-prime-adventure-part-5?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/comp-number-theory/v/algorithmic-efficiency?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: 53748 Khan Academy Labs
In statistics, if we roll a six-sided die X amount of times, the number of times each face will appear becomes more equal as X approaches infinity. In this lesson, we use the Secure Random Number Class to generator a random number between one and three and prove the statistic to be true using a for loop.
Views: 317 TDG Industries
This video reviews a prime number tester and value set generator that uses optimized testing methods and .AsParallel() to accelerate results. :) Here's the original code: https://gist.github.com/electricessence/846cd4483dcaa073020edaafe3572a78 Here's the updated released library: https://github.com/electricessence/Open.Numeric.Primes/tree/master
Views: 312 Code Evolution
We discuss various prime number sieves such as the Sieve of Eranthoses, to find all primes from 1 to N. We then talk about a segmented sieve approach, and discuss the time complexity for finding primes in a given range. Code: https://github.com/gkcs/ChainReaction/blob/master/src/main/java/main/java/videos/PrimeNumberSieve.java References: https://en.wikipedia.org/wiki/Sieve_of_Eratosthenes
Views: 11315 Gaurav Sen
Prime factorization - A classic problem in computer science! Today, we'll look at how to approach this problem, and we'll see pitfalls and issues with it! = Download the Code = https://drive.google.com/open?id=1_zehF2Rik0ajfwq024q408j2bcImMJLa = Contents Page = 00:37 Contents Page 01:29 What are primes / what is factorization 03:44 Primes and Factorization in computing 06:04 Discussion: How to test if a number is prime 07:38 Coding: Prime Testing Function 09:50 Testing: Prime Testing Function 10:29 Discussion: Prime Factorization Technique 12:32 Coding: Prime Factorization 15:30 Testing: Prime Factorization Code 16:03 Performance Pitfalls of Method 16:56 Coding: Adding code to track timing 19:27 Discussions: How to improve prime testing performance 23:09 Coding: Writing our optimizations 25:22 Testing: Optimized Code 25:41 Demonstration of extended code 28:02 Conclusion = 0612 TV = 0612 TV, a sub-project of NERDfirst.net, is an educational YouTube channel. Started in 2008, we have now covered a wide range of topics, from areas such as Programming, Algorithms and Computing Theories, Computer Graphics, Photography, and Specialized Guides for using software such as FFMPEG, Deshaker, GIMP and more! Enjoy your stay, and don't hesitate to drop me a comment or a personal message to my inbox =) If you like my work, don't forget to subscribe! Like what you see? Buy me a coffee → http://www.nerdfirst.net/donate/ 0612 TV Official Writeup: http://nerdfirst.net/0612tv More about me: http://about.me/lcc0612 Official Twitter: http://twitter.com/0612tv = NERDfirst = NERDfirst is a project allowing me to go above and beyond YouTube videos into areas like app and game development. It will also contain the official 0612 TV blog and other resources. Watch this space, and keep your eyes peeled on this channel for more updates! http://nerdfirst.net/ ----- Disclaimer: Please note that any information is provided on this channel in good faith, but I cannot guarantee 100% accuracy / correctness on all content. Contributors to this channel are not to be held responsible for any possible outcomes from your use of the information.
Views: 1951 0612 TV w/ NERDfirst
#rsa #deffiehellman #cryptographylectures #lastmomenttuitions 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: 317203 Last moment tuitions
https://www.hacktivity.com Random numbers are very important in many fields of computer science, especially in cryptography. One of the most important usages of pseudorandom number generators (PRNG) are is key generation methods for cryptographic purposes. In this presentation a modification of the prime generation method of the OpenSSL library will be presented. The modified version of the library passes every well-known statistical tests (e.g NIST test, DIEHARD test), however while an adversary is still able to reconstruct the prime numbers (P,Q) from the public key. The method can be used for malicious purposes as a sophisticated backdoor. The presented research is based on the theory of kleptography and a recently published research paper.
Views: 219 hacktivity
Link to code: https://goo.gl/RtLPmo This is a video on Python programming about Prime Number Checker program "Primecheck.py" from series mY pYTHON pROGRAMS. This series is intended to share my coding experience in Python. Algorithm used::Eratosthenes/Segmented Sieve Check this page on Wikipedia for more Information On algorithm https://goo.gl/Y6Mw1J What is Prime Number? A prime number is a positive integer that has exactly two factors, 1 and the number itself What is Python? Python is a widely used high-level programming language for general-purpose programming, created by Guido van Rossum and first released in 1991. An interpreted language, Python has a design philosophy which emphasizes code readability (notably using whitespace indentation to delimit code blocks rather than curly braces or keywords), and a syntax which allows programmers to express concepts in fewer lines of code than possible in languages such as C++ or Java. The language provides constructs intended to enable writing clear programs on both a small and large scale OS:LINUX Text-Editor:::Gedit/Sublime-Text Thank You for watching Good luck in Learning Python You have full right to use the codes and projects. Please Subscribe the Channel
Views: 239 the BIT Learner
Views: 4023 RobinsonProgramming.com
This video covers the more advanced, high-speed prime generation technique known as the Sieve method. If you like the video, please don't forget to like, comment, and subscribe to my channel for more videos! If you have a request, feel free to post it in the comments below and I will respond within 24 hours. :)
Views: 3501 AxiomaticUncertainty
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/donateinfi What is a the difference between a random and a pseudorandom number? And what can pseudo random numbers allow us to do that random numbers can't? Tweet at us! @pbsinfinite Facebook: facebook.com/pbsinfinite series Email us! pbsinfiniteseries [at] gmail [dot] com Previous Episode How many Cops to catch a Robber? | Infinite Series https://www.youtube.com/watch?v=fXvN-pF76-E Computers need to have access to random numbers. They’re used to encrypt information, deal cards in your game of virtual solitaire, simulate unknown variables -- like in weather prediction and airplane scheduling, and so much more. But How can a computer possibly produce a random number? Written and Hosted by Kelsey Houston-Edwards Produced by Rusty Ward Graphics by Ray Lux Assistant Editing and Sound Design by Mike Petrow Made by Kornhaber Brown (www.kornhaberbrown.com) Special Thanks to Alex Townsend Big thanks to Matthew O'Connor and Yana Chernobilsky who are supporting us on Patreon at the Identity level! And thanks to Nicholas Rose and Mauricio Pacheco who are supporting us at the Lemma level!
Views: 126526 PBS Infinite Series
=================================================== 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: 1414 Ahmed Saleh
EECE 412 Network Security Group 15: Joey Liu, Leon Yu, Aobo Yu, Braulio Chavez Song used: Bei Bei Shawn Lee - Little Sunrise Program used: Sony Vegas 10 Here's our website: http://randomtester.herokuapp.com/team
Views: 354 Joey Liu
Hello everyone, this is the second Python Project video. Here, we make a script to generate prime numbers! It's easy to make, and only took me around 10-15 minutes. Thanks for watching, remember to subscribe, and, as promised, here is the link for the full code: https://docs.google.com/document/d/1E1FH8fzSeAClxnswMAzzfh0jk9NQGJowB4S5sbsf42s/edit?usp=sharing
Views: 289 Learn2Python Videos
Previous video: https://youtu.be/FhrsUCICh-Y Next video: https://youtu.be/KnHp1uSm6k0
Views: 496 Leandro Junes
Pseudorandom number generators are explained using John Von Neumann's middle squares method. Machines can't roll dice so they do a trick to generate randomness - they grow randomness. The middle squares method is explained from a computer science perspective using clocks as seeds. This is a clip from Art of the Problem episode #1. This clip features original music from Hannah Addario-Berry
Views: 40287 Art of the Problem
Twenty minute introduction to randomness and pseudorandom number generators, with demos. The New Mexico CS for All project is teaching computational thinking and programming. Production supported by the National Science Foundation, award # CNS 1240992
Views: 28152 Dave Ackley
Some of the most widely used cryptographic protocols, including TLS, depend on fast execution of modular big-number arithmetic. Cryptographic primitives are coded by an elite set of implementation experts, and most programmers are shocked to learn that performance-competitive implementations are rewritten from scratch for each new prime-number modulus and each significantly different hardware architecture. In the Fiat Cryptography project, we show for the first time that an automatic compiler can produce this modulus-specialized code, via formalized versions of the number-theoretic optimizations that had previously only been applied by hand. Through experiments for a wide range of moduli, compiled for 64-bit x86 and 32-bit ARM processors, we demonstrate typical speedups vs. an off-the-shelf big-integer library in the neighborhood of 5X, sometimes going up to 10X. As a bonus, our compiler is implemented in the Coq proof assistant and generates proofs of functional correctness. These combined benefits of rigorous correctness/security guarantees and labor-saving were enough to convince the Google Chrome team to adopt our compiler for parts of their TLS implementation in the BoringSSL library. The project is joint work with Andres Erbsen, Jade Philipoom, Jason Gross, and Robert Sloan. See more at https://www.microsoft.com/en-us/research/video/fiat-cryptography-automatic-correct-by-construction-generation-of-low-level-cryptographic-code/
Views: 1171 Microsoft Research
This video is for testing if a number is prime using simple few lines of codes in Python. To recall, Prime numbers are those numbers which are only exactly divisible (with reminder 0) by 1 and number itself. Thank you for watching !!
Views: 120 The Python Geek
Random number most often is the requirement for programmers for some sort of randomization or security purpose. Different classes available to generate Random number, How to use java.lang.Math.random() and java.util.Random classes to generate random number. How to generate random number between upper and lower limit. java.security.SecureRandom is mostly used in cryptography.
Views: 536 Java Mitra
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: 640843 Art of the Problem