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Search results “Understanding cryptography problems solutions”

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If you are looking for a job or preparing for placements then register here to know how you can get a job - https://goo.gl/4525yu. 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: 64047 FACE Prep

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Modular arithmetic especially the properties of congruence are an important tool in arriving at quick solutions to a variety of problems. In this video Mayank unravels this concept of Congruence starting with the basic concepts and then explaining the 5 key properties of Congruence (≡): a+c ≡ (b+d)mod N (Remainder of Sums ≡ Sum of Remainders) a-c ≡ (b-d)mod N (Remainder of Difference ≡ Difference of Remainders) ac ≡ (bd)mod N (Remainder of Products ≡ Products of Remainders) a^e ≡ b^e mod N (Remainder of Exponent ≡ Exponent of Remainders) a/e ≡ b/e (mod N/gcd(N,e)) (However, don’t do division without writing basic equation Mayank applies these concepts to arrive at quick solutions for 7 representative problems - reducing seemingly impossible math involving large numbers to mere seconds. Some example problems from the video: Find the remainder 6^(6^(6^6 ) )/7 Find the last digit of (17)^16 There are 44 boxes of chocolates with 113 chocolates in each box. If you sell the chocolates by dozens, how many will be leftover? More Motivations – Reducing Big Number @0:08 Why Bother? – Shortcuts to Several Problems @1:10 Face of a Clock @2:05 Face of a Clock Replace 12 with 0 – Module 12 @4:38 What Happens with 7 Days? @6:20 Running the Clock Backwards @8:37 Addition and Subtraction of Congruence’s @10:54 Application of Addition – Example-1 @14:30 Multiplication in Congruence’s @18:46 Application of Multiplication – Example -2/3 @22:15 Exponentiation in Congruence’s @26:08 Application of Exponentiation Example -4/5 @27:58 Division of Congruence’s: Never Divide, Think from Basics @33:37 Combining Congruence’s @38:43 Example – 6 @40:36 Concept of Multiplicative Inverse @48:33 Summary @49:30 Next – Faster Solutions to Exponent Problems @51:05 #Inverse #Exponentiation #Dozens #Subtraction #Happen #Congruence #Arithmetic #Reducing #Motivations #Delayed #Mayank #Examrace
Views: 47237 Examrace

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RSA Public Key Encryption Algorithm (cryptography). How & why it works. Introduces Euler's Theorem, Euler's Phi function, prime factorization, modular exponentiation & time complexity. Link to factoring graph: http://www.khanacademy.org/labs/explorations/time-complexity
Views: 531954 Art of the Problem

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Views: 448837 itfreetraining

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For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com

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Views: 36304 Android Authority

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Views: 174866 Eddie Woo

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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: 151105 F5 DevCentral

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Views: 2594687 SciShow

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A solution to a typical exam question. See my other videos https://www.youtube.com/channel/UCmtelDcX6c-xSTyX6btx0Cw/.
Views: 270261 Randell Heyman

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How modern encryption systems can share secret keys without transmitting them. This means that even when powerful government agencies, criminals, competitors, or ISPs listen in on absolutely everything you do, your information can still be kept private, even if you need to communicate with a total stranger and have never made any prior arrangements for privacy. This is absolutely the clearest, most comprehensive explanation of the Diffie Hellman key exchange protocol ever done in video. After you watch this, you will understand Diffie Hellman cryptographic key exchange better than 99.999% of the human population, and you won't need math beyond the 4th grade level! Find more on our web site: http://www.AskMisterWizard.com
Views: 12247 bbosen

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This video explains why key exchange is an issue in cryptography and introduces Diffie-Hellman's solution to this problem. NB : This video was created as a part of an assignment. It is heavily influenced from another youtube video which you can find here https://www.youtube.com/watch?v=YEBfamv-_do
Views: 45559 Bishal Sapkota

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In this video I show how to run the extended Euclidean algorithm to calculate a GCD and also find the integer values guaranteed to exist by Bezout's theorem.
Views: 42937 John Bowers

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For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com

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For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com

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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 12634 Udacity

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For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com. The book chapter "Introduction" for this video is also available for free at the website (click "Sample Chapter").

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solution Ch #7 book Understanding Cryptography by Christof Paar · Jan Pelzl Let the two primes p = 41 and q = 17 be given as set-up parameters for RSA. 1. Which of the parameters e1 = 32,e2 = 49 is a valid RSA exponent? Justify your choice
Views: 89 Ahmed Dawood

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How to solve 17x ≡ 3 (mod 29) using Euclid's Algorithm. If you want to see how Bézout's Identity works, see https://www.youtube.com/watch?v=9PRPr6J_btM
Views: 173517 Maths with Jay

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Chinese Remainder Theorem or CRT is useful for a variety of competitive exams including Olympiad, CAT, JEE etc. Apply CRT to remainder problems enable quick solution to otherwise impossible looking aptitude problems. Mayank explains CRT simply as an observation which allows us to express the answer to a remainder problem as a sum of components. Here all the components are completely divisible by all but one of the given numbers, i.e., each component provides the desired remainder for one of the divisions and is fully divisible by other numbers (no remainder) By understanding this simple intuition, we will develop a simple method to easily apply Chinese Remainder Theorem (CRT) to variety of problems, without resorting to complicated formulas. We will also learn two easy tricks to simplify CRT problems and computations. Remember, CRT is a powerful tool, however even after learning CRT, first try to solve the questions using LCM and HCF tricks mentioned in this video. And even when you use CRT simplify and combine the terms with common remainders to make the computations easier. Chinese Remainder Theorem (CRT) @0:09 Recap @0:34 Smallest Number When Divided by x, y and z Leaves Remainder a, b, c? @1:03 Find the Smallest number which when divided by 2, 3 and 5 produces 1, 2, 3 as remainders @1:32 Find the Smallest number which when divided by 7, 9 and 11 produces 1, 2, 3 as remainders @ 6:06 Simplifying CRT @12:41 Find the smallest number which when divided by 2, 3, and 5 produced 1, 2, 2 as remainders @12:47 24 Produces a remainder 4 when divided by 5 @18:47 Find the Smallest number which when divided by 7, 9 and 11 produces 1, 2, 3 as remainders @20:05 ■(7-1=5 & &7-2×[email protected]=7& &9-2×[email protected]=8& &11-2×3=5) CRT is Last Resort!! @22:11 Word Problems on Chinese Remainder Theorem @23:23 #Compelled #Simultaneously #Forbid #Resort #Intuitive #Simplifying #Smallest #Produce #Remainder #Relatively #Mayank #Examrace
Views: 35093 Examrace

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This is a segment of this full video: https://www.youtube.com/watch?v=YEBfamv-_do Diffie-Hellman key exchange was one of the earliest practical implementations of key exchange within the field of cryptography. It relies on the discrete logarithm problem. This test clip will be part of the final chapter of Gambling with Secrets!
Views: 442829 Art of the Problem

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How many people do you need in a group together before you've got a 50% chance of two people sharing the same birthday? If you've never seen this before, the answer is likely to surprise you. The Birthday Problem is sometimes called the Birthday Paradox, but it's not a paradox in the true sense of the word, but it is an extremely counterintuitive result. In the 2nd half of the video I will demonstrate that the result is correct by using simple probability. Once you've watched this video, next time you're in a group of people of about the right size, why not try and find out if there are any shared birthdays! Social Media: Facebook: http://facebook.com/RichardB1983 Twitter: http://twitter.com/rb357 Instagram: http://instagram.com/RichardB_1983 Google Plus: http://google.com/+RichardB1983
Views: 52725 RichardB1983

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Views: 184825 CrashCourse

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In this video, I cover the Two Generals Problem, The Byzantine Generals Problem, Byzantine Fault Tolerance, Proof of Work, Proof of Stake, and Delegated Byzantine Fault Tolerance. The Byzantine Generals problem will help others understand why a blockchain does what it does, and it illustrates why they are important. Originally I was designing this video to just highlight DBFT, NEO’s consensus model, but naturally, I got a little carried away and produced this massive video. That being said, when analyzing one consensus model, it’s important to understand how they compare to other existing models. If this is too long to sit through feel free to skip around! 0:52 Two Generals Problem 2:19 Byzantine Generals Problem 5:20 Byzantine Fault Tolerance 6:25 Proof of Work Consensus 10:14 Proof of Stake Consensus 12:30 Delegated Byzantine Fault Tolerance 17:00 “I thought NEO was proof of stake?” Add me on Linkedin! https://www.linkedin.com/in/avery-carter-705ba6132 ---------- Resources: Article on the Byzantine Generals Problem https://medium.com/loom-network/understanding-blockchain-fundamentals-part-1-byzantine-fault-tolerance-245f46fe8419 Article on Proof of Work & Proof of Stake https://medium.com/loom-network/understanding-blockchain-fundamentals-part-2-proof-of-work-proof-of-stake-b6ae907c7edb Satoshi Nakamoto’s Email https://www.mail-archive.com/[email protected]/msg09997.html Ethereum Docs on Proof of Stake https://github.com/ethereum/wiki/wiki/Proof-of-Stake-FAQ#what-is-the-nothing-at-stake-problem-and-how-can-it-be-fixed NEO Docs on DBFT http://docs.neo.org/en-us/basic/consensus/consensus.html http://docs.neo.org/en-us/basic/consensus/whitepaper.html
Views: 4390 Avery Carter

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What is the story of Byzantine Generals and how is it related to Bitcoin and Ethereum? Programmer explains. https://steemit.com/@ivanli Reddit link https://www.reddit.com/r/Buttcoin/comments/4qa12v/byzantine_generals_proofofwork_for_dummies/ Thanks for watching guys, if you'd like to support me and donate to the channel, here are my addresses: 💎 ETH 0x27F80bc928aB65B499514D9a429249F55849fc75 💎 LTC LWzA2kd6PB3niQcegAmJbTTpE5ovf812Mj 💎 BTC 1QLBCmPsrDS8YHe5AApPyFsHFnvPsTenj4 💎 DASH XfX56mNDawvmxxWv3nF9Ev93W4MsmCbeXp
Views: 27974 Ivan on Tech

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Once you know how to solve diophantine equations with a single variable, the next step in complexity is to consider equations with two variables. The simplest such equations are linear and take the form ax+by=c. Before we solve this equation generally, we need a preliminary result. We show that you can solve the equation ax+by=GCD(a,b) by performing the Euclidean algorithm, and then reverse-substituting to arrive at a single solution. Subject: Elementary Number Theory Teacher: Michael Harrison
Views: 83530 Socratica

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Views: 7203 365 Careers

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This tutorial demonstrates how the euclidian algorithm can be used to find the greatest common denominator of two large numbers. Learn Math Tutorials Bookstore http://amzn.to/1HdY8vm Donate http://bit.ly/19AHMvX
Views: 283427 Learn Math Tutorials

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Views: 235435 Technical Guruji

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In a room of just 23 people there’s a 50-50 chance of two people having the same birthday. In a room of 75 there’s a 99.9% chance of two people matching. https://betterexplained.com/articles/understanding-the-birthday-paradox/
Views: 43976 Better Explained

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Find the least residue (modulo p) using Fermat's Little Theorem; or find the remainder when dividing by p. We start with a simple example, so that we can easily check the answer, then look at much bigger numbers where the answers cannot be directly checked on a calculator.
Views: 194250 Maths with Jay

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hill climbing search algorithm 1 hill climbing algorithm evaluate initial state, if its goal state quit, otherwise make current state as initial state 2 select a operator that could generate a new state 3 evaluate new state if closer to goal make it current state if not better ignore this state 4 if current goal state than quit otherwise repeat. Follow us on : Facebook : https://www.facebook.com/wellacademy/ Instagram : https://instagram.com/well_academy Twitter : https://twitter.com/well_academy Tags : hill climbing search algorithm,hill climbing in ai,hill climbing in artificial intelligence,hill climbing algoritm,artificial intelligence hill climbing,ai hill climbing search algorithm,what is hill climbing search algorithm ?,explanantion of hill climbing search algorithm,hill climbing explanation,hill climbing working,hill climbing serach algorithm notes,artificial,intelligence,ai,algorithm,well academy

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Views: 1106200 Sharkee

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Innovations in Algorithmic Game Theory May 23rd, 2011 Hebrew University of Jerusalem First session: Micheal O. Rabin - Cryptography and Solutions for Matching Problems Session Chair: Noam Nisan.

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Views: 3521754 Numberphile

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Cryptography is a systems problem (or) 'Should we deploy TLS' Given by Matthew Green, Johns Hopkins University
Views: 5696 Dartmouth

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How did the field of quantum mechanics come about in the first place? The Rayleigh-Jeans catastrophe, also known as the ultraviolet catastrophe was a prediction by the Rayleigh-Jeans law that a blackbody would radiate infinite amounts of ultraviolet light. It wasn’t until Max Planck came along and predicted that light came in packets or quanta that the field of quantum mechanics emerged and unintentionally solved the ultraviolet catastrophe. Help us translate our videos! http://www.youtube.com/timedtext_cs_panel?c=UC7DdEm33SyaTDtWYGO2CwdA&tab=2 Creator: Dianna Cowern Editor: Jabril Ashe Writer: Sophia Chen Animations: Jabril Ashe/Kyle Norby Thanks to Ashley Warner and Kyle Kitzmiller http://physicsgirl.org/ http://twitter.com/thephysicsgirl http://facebook.com/thephysicsgirl http://instagram.com/thephysicsgirl Subscribe to Physics Girl for more fun physics! Music: APM
Views: 489178 Physics Girl

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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 3356 Udacity

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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 2430 Udacity

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CTFs are one of the best ways to get into hacking. They require a lot of work and dedication, but are highly rewarding and teach you a lot. Here is a quick introduction on how to get started with CTFs. Join the discussion: https://www.reddit.com/r/LiveOverflow/comments/59b1dn/what_is_ctf_an_introduction_to_security_capture/ CTFtime: https://ctftime.org/
Views: 93628 LiveOverflow

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Solutions to some typical exam questions. See my other videos https://www.youtube.com/channel/UCmtelDcX6c-xSTyX6btx0Cw/.
Views: 34199 Randell Heyman

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