'Large primes' presentation slideshows

Public key ciphers 1

Public key ciphers 1. Session 5. Contents. Intractability and NP- completness Primality testing Factoring large composite numbers Complexity of RSA Security of RSA. Intractability and NP- completness. A problem A general question that must be answered

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Cryptosystems, Hash Functions and Digital Signatures

Cryptosystems, Hash Functions and Digital Signatures. --- Lecture 4 ---. Outline. Why public key cryptography ? General principles of public key cryptography The RSA public key cryptosystem One way hash functions Digital signature. Private key cipher. Cipher Text. Cipher Text.

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Public Key Encryption Systems

Public Key Encryption Systems. The encrypter and decrypter have different keys C = E(K E ,P) P = D(K D ,C) Often, works the other way, too. History of Public Key Cryptography. Invented by Diffie and Hellman in 1976 Merkle and Hellman developed Knapsack algorithm in 1978

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Abstract

Abstract.

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Random Numbers and Monte Carlo Methods

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On Designing Collusion-resistant Routing Schemes for Non-cooperative Wireless Ad Hoc Networks

On Designing Collusion-resistant Routing Schemes for Non-cooperative Wireless Ad Hoc Networks. Sheng Zhong and Fan Wu Speaker: Fan Wu SUNY at Buffalo Sep.13, 2007. Motivation. Wireless ad hoc networks No infrastructure Functioning depends on cooperation

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Modern Cryptography

Modern Cryptography. The Enigma Machine. German encryption and decryption machine used in WWII Essentially a complex, automated substitution cipher. How did Enigma work?. Rotors have different wiring connecting input to output Rotors move after each keypress

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Genetic Algorithms

Genetic Algorithms. CS121 Spring 2009 Richard Frankel Stanford University. Outline. Motivations/applicable situations What are genetic algorithms? Pros and cons Examples. Motivation.

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Cryptography

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Cryptography or Smalltalkers 2 Public Key Cryptography

Cryptography or Smalltalkers 2 Public Key Cryptography. Martin Kobetic Cincom Smalltalk Development ESUG 2006. Contents. Public Key Algorithms Encryption (RSA) Key Establishment (RSA, DH) Signing Hashes (SHA, MD5) MACs (HMAC, CBC-MAC) Digital Signatures (RSA, DSA).

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CSCE 815 Network Security Lecture 6

CSCE 815 Network Security Lecture 6 . Public Key Encryption. Resources. /class/csce815-001/Handouts/ Assignment1.tar Stallings site Slides from Lawrie Brown & Henric Johnson. Private-Key Cryptography. traditional private/secret/single key cryptography uses one key

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Public Key Cryptography

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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 .

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Cryptographic basics

Cryptographic basics. Cryptology is divided into cryptography and steganography. Cryptography means ciphering and deciphering text. The goal is not to hide that test is encrypted. It is only difficult to decrypt it.

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Public Key Based Cryptoschemes for Data Concealment in Wireless Sensor Networks

Public Key Based Cryptoschemes for Data Concealment in Wireless Sensor Networks. Einar Mykletun , Joao Girao , Dirk Westhoff IEEE ICC 2006 , 1-4244-0355-3/06 Citation: 73 Presenter: ??? Date: 2012/12/17. Outline. Introduction A Desirable Homomorphic Cryptoscheme

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Primes

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RSA

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Question 13 page 160

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