'Public key cryptosystem' diaporamas de présentation

Public Key Infrastructure: A Tutorial

Public Key Infrastructure: A Tutorial. Ravi Mukkamala Department of Computer Science Old Dominion University Norfolk, Virginia, USA mukka@cs.odu.edu. ORGANIZATION. Introduction PKI Architectures Revocation Modes of deployment PKI Alternatives Wireless PKI References. INTRODUCTION.

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Ch1 - Algorithms with numbers

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Cryptography

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Presenter: Dr. Shiuh-Jeng Wang

Authentication and Cryptography on Wireless Communication Systems ( cited from IEEE Trans. Computer, Oct. 2004 ). Presenter: Dr. Shiuh-Jeng Wang Keynote speech at Florida State University (FSU), Oct. 1 and 7, 2004 Keynote speech at University of Florida (UF), Nov. 01, 2004

481 views • 39 slides

A Survey on the Algebraic Surface Cryptosystems

A Survey on the Algebraic Surface Cryptosystems. Koichiro Akiyama ( TOSHIBA Corporation ) Joint work with Prof. Yasuhiro Goto. 2013/03/02. Contents. Introduction Public key cryptosystem, Motivation Section Finding Problem A Computational Hard Problem on Algebraic Surface

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Announcements

Announcements. Assignment 4 due by noon Friday Final Exam Thursday April 29, 7:00-9:00. CSE A101 Cumulative, emphasis on part III Pick up graded work by May 28. Lecture 42. Solution space trees and backtracking 21.1. Hard Problems. Some problems are hard to solve.

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Part I

Part I. Encryption and Decryption (part 3). From DES to AES. DES was adopted as a standard symmetric key encryption algorithm by the ISO in 1978 it was agreed to review the security of the algorithm every four years. http://csrc.nist.gov/publications/fips/fips46-3/fips46-3.pdf

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RSA & F actoring I ntegers

RSA & F actoring I ntegers. By: Mike Neumiller & Brian Yarbrough. Integer Factorization. Reducing an integer into its prime components Useful for code breaking RSA uses a semi-prime number to encrypt data Semi-prime number : a number made by the multiplication of two prime numbers. RSA.

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Secret Codes , Unforgeable Signatures , and Coin Flipping on the Phone Martin Tompa

Secret Codes , Unforgeable Signatures , and Coin Flipping on the Phone Martin Tompa Computer Science & Engineering University of Washington. Secret Codes , Unforgeable Signatures, and Coin Flipping on the Phone. What Is a Cryptosystem?. K AB. K AB. A Sender. B Receiver. M.

280 views • 19 slides

New Directions in Cryptography

New Directions in Cryptography. CS 303 Alg. Number Theory & Cryptography Jeremy Johnson. Witfield Diffie and Martin E. Hellman, New Directions in Cryptography, IEEE Transactions on Information Theory, Vol. IT-22, No. 6, Nov. 1976. Classical Cryptography.

614 views • 19 slides

El Gamel

El Gamel. Public Key Cryptosystem. The Discrete Log Problem. The El Gamel public key cryptosystem is based upon the difficulty of solving the discrete logarithm problem (DLP) which is as follows: Given a prime p and values g and y , find x such that y = g x mod p.

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Network and Computer Security (CS 475) Modular Arithmetic and the RSA Public Key Cryptosystem

Network and Computer Security (CS 475) Modular Arithmetic and the RSA Public Key Cryptosystem. Jeremy R. Johnson. Introduction. Objective: To understand what a public key cryptosystem is and how the RSA algorithm works. To review the number theory behind the RSA algorithm.

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Applied Symbolic Computation (CS 300) Modular Arithmetic and the RSA Public Key Cryptosystem

Applied Symbolic Computation (CS 300) Modular Arithmetic and the RSA Public Key Cryptosystem. Jeremy R. Johnson. Introduction. Objective: To understand what a public key cryptosystem is and how the RSA algorithm works. To review the number theory behind the RSA algorithm.

305 views • 15 slides

Many-to-one Trapdoor Functions and their Relations to Public-key Cryptosystems

Many-to-one Trapdoor Functions and their Relations to Public-key Cryptosystems. M. Bellare S. Halevi A. Saha S. Vadhan. Introduction . One-way function Easy to compute, hard to invert Trapdoor function One-way function Hard to invert; but with trapdoor , easy to invert.

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Security in Electronic Commerce

Security in Electronic Commerce. The need for Public Key Infrastructure Budi Rahardjo Presented at BPPT, Jakarta, Indonesia 10 February 2000. Outline. Brief intro on {computer, network, information} security and its relation to electronic commerce

300 views • 13 slides

ElGamal Public Key Cryptography

ElGamal Public Key Cryptography. CS 303 Alg. Number Theory & Cryptography Jeremy Johnson.

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RSA Cryptosystem

RSA Cryptosystem. What is RSA ?. RSA is a public-key cryptosystem . It was developed by Ronald Rivest, Adi Shamir, and Leonard Adleman in 1977. The security of the RSA system is based on the hard problem of factoring a large integer. Public-key cryptosystem.

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Elliptic curve arithmetic and applications to cryptography

Elliptic curve arithmetic and applications to cryptography. By Uros Abaz Supervised by Dr. Shaun Cooper and Dr. Andre Barczak. Structure of the talk. Introduction to cryptography Motivation for studying elliptic curve cryptography (ECC) Theory of elliptic curves

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RSA ( Rivest, Shamir, Adleman) Public Key Cryptosystem http://www.rsasecurity.com/rsalabs/faq/3-1.html

RSA ( Rivest, Shamir, Adleman) Public Key Cryptosystem http://www.rsasecurity.com/rsalabs/faq/3-1.html. Hard Problems. Some problems are hard to solve. No polynomial time algorithm is known.

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CSCI 530L

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