RSA

Oct 10, 2012

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RSA

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RSA

RSA. Le RSA a trois objectifs principaux :. Lutter contre la pauvreté en garantissant un revenu aux personnes sans ressources ou faiblement rémunérées. Encourager l’exercice ou le retour à une activité professionnelle en supprimant les effets de seuil à la reprise d’activité.

498 views • 23 slides

RSA

RSA. Prime Numbers. An integer p is a prime number if it has no factors other than 1 and itself. An integer which is greater than 1 and not a prime number is said to be composite. Thus given a composite number c we know that c=r*s for some non-trivial integers r and s .

465 views • 21 slides

RSA Encryption

RSA Encryption. William Lu. RSA Background. Basic technique first discovered in 1973 by Clifford Cocks of CESG (part of British GCHQ) Invented in 1977 by Ron Rivest, Adi Shamir and Len Adleman. RSA Uses. Public key encryption Digital signatures. RSA Algorithm.

551 views • 14 slides

RSA

RSA. CS 519 Cryptography and Network Security Instructor: Ali Aydin Selcuk. RSA. First successful public key system (Rivest, Shamir, Adleman, 1977). Q: Would a DH-like PKC as x e mod p work? RSA: Alice chooses large primes p, q; n = pq. e, such that gcd(e, (n)) = 1.

399 views • 13 slides

RSA

RSA. RSA COSC 201 St. Mary’s College of Maryland Fall 2012. Public Key Encryption. Bob wants to send Alice a super secret message. How? Alice generates 2 keys – a public encryption key and a private decryption key. Bob takes the encryption key, encodes the message, then sends it to Alice.

295 views • 9 slides

RSA-256bit

RSA-256bit. 數位電路實驗 TA: 吳柏辰. Author: Trumen. Outline. Introduction to Cryptography RSA Algorithm Montgomery Algorithm for RSA-256 bit. Introduction to Cryptography. Communication Is Insecure. Bob. Alice. Paparazzi. Secure Approach: Cryptosystems. Bob. Alice. Paparazzi.

419 views • 28 slides

RSA

RSA. Slides by Kent Seamons and Tim van der Horst Last Updated : Oct 1, 2013. Recap. Recap. Number theory What is a prime number? What is prime factorization? What is a GCD? What does relatively prime mean? What does co-prime mean? What does congruence mean?

599 views • 27 slides

RSA

RSA. RSB. RSC. RSD. RSE. RSF. RSG. RSH. RSI. RSJ. RSK. RSL.

252 views • 12 slides

RSA

RSA. Preliminaries. Division Algorithm. Given integers a and b ≠0 , there exist unique Integers q and r such that a = bq +r where 0 ≤ r < |b| a is the dividend , b is the divisor , and r is the remainder . b divides a or b is a factor of a if r=0.

349 views • 21 slides

RSA

RSA. The algorithm was publicly described in 1977 by Ron Rivest, Adi Shamir, and Leonard Adleman at MIT Partly used for PGP (Pretty Good Privacy) to encrypt session keys. RSA – Step 1. Choose two distinct large random prime numbers p and q, e.g. p = 17 and q = 11

362 views • 14 slides

RSA

RSA. Exponentiation cipher Relies on the difficulty of factoring the product of two large prime numbers RSA factoring challenge http://www.rsa.com/rsalabs/node.asp?id=2092 It takes 30 2.2GHz-Opteron-CPU years to factor a number, about 5 months of calendar time. Background.

332 views • 12 slides

RSA

RSA. Dornélio Mori Ney Bermudes. Agenda. Origem e Definição Fundamentação Matemática O algoritmo Complexidade Conclusão e trabalhos futuros Referências. Origem e Definição. Inventado por Ron Rivest, Adi Chamir e Len Adleman e publicado em 1977

342 views • 17 slides

RSA

RSA. Rivest Shamir Adelman: Patented in 1983, expired in 2000 Based on difficulty of factorization Choose two large random prime numbers p and q, Compute n = p*q Compute φ (n) = (p-1)(q-1) Choose an integer e, such that e, is coprime to φ (n) -- e, is released as the public key

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RSA

RSA. Monica Bianchini monica@ing.unisi.it Dipartimento di Ingegneria dell’Informazione Università di Siena. Introduzione  1.

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RSA – Info

RSA – Info. Neigungsdifferen-zierung 7 - 10 Eine Information für Eltern und Schüler/innen der Realschule Anröchte Stand: April 2011. Warum Differenzierung?. Schülerinnen und Schüler haben unterschiedliche Begabungen und Neigungen. Sie möchten ihren Lernbedürfnissen entsprechend lernen. 

534 views • 39 slides

RSA

RSA. 學　　生： A0933332 張郡芳指導老師：梁明章教授. 對稱金鑰系統. 加密與解密都使用同一個金鑰. 非對稱金鑰系統. 金鑰必須是一對，分成公鑰跟私鑰使用公鑰加密的資料只能用私鑰解密，使用私鑰加密的資料只能用公鑰解密。. RSA. 1976 年被提出概念。 1978 年 Rivest 、 Shamir 與 Adleman (RSA) 提出公開金鑰架構。. RSA 原理. 選擇相異大質數 p & q ，得其積 n n = p * q Φ (n) = (p-1)*(q-1)

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RSA

RSA. Sistemi di crittografia. Prof.ssa Lilli Fragneto Prof.ssa Maria Elena Zecchinato Boniolo Luca Breveglieri Francesca Caneve Piero Cantisani Giorgia Fessler Stefano Ghiro Lorenzo Mautone Luca Remondini Gianluca Silvestri Mattia. Crittografia.

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RSA

RSA. By: Abhishek Naik Viswanath Chennuru CPSC 624. Contents. What is Encryption ? What is RSA ? Key Generation Encryption and Decryption Applications Attacks on RSA Conclusion. What is encryption ?.

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RSA

Rivest, Shamir and Adleman 1978 - 1979. RSA. Rivest Shamir Adleman. Depends on the difficulty of factoring really large numbers. Security. Key Pair. Choose 2 random large (300 to 600 digits) prime numbers, p and q. p and q should be of equal length Compute n = pq

243 views • 10 slides

RSA

Public Key Crypto RSA. RSA. CSCI284 Spring 2007 GWU Sections 5.1, 5.2.2, 5.3. How does Alice send Bob the decryption key in private key crypto?. If Alice wants it such that anyone can decrypt her messages, but know that they came from her

497 views • 34 slides

RSA

Public Key Crypto RSA. RSA. CSCI284 Spring 2004 GWU. Advanced Cryptography CSCI 297/later 381. Theory of secrecy: hard problems and crypto Elliptic curves Electronic Cash and Anonymous Credentials PRNGs Not much Cryptanalysis, Shannon secrecy. Advanced Crypto: Grading.

583 views • 38 slides

RSA

RSA. CS 470 Introduction to Applied Cryptography Instructor: Ali Aydin Selcuk. RSA. First successful public key system (Rivest, Shamir, Adleman, 1977). Q: Would a DH-like PKC as x e mod p work? RSA: Alice chooses large primes p, q; n = pq. e, such that gcd(e, (n)) = 1.

341 views • 13 slides

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