'Random primes' diaporamas de présentation

Session 4

Session 4. Asymmetric ciphers. Contents. Definition of asymmetric (public key) ciphers Applications of asymmetric ciphers The public key encipherment procedure The RSA public key cipher system. KEY. KEY. encipher. Ciphertext. decipher. Plaintext. Plaintext. A. B. Cryptanalysis.

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Cryptography

797 views • 60 slides

Security and Internet Commerce

Security and Internet Commerce. Chapter 29. Security in Transaction Processing Systems. Security is essential in many transaction processing applications Authentication Is the user who he says he is? Authorization What is an authenticated user allowed to do?

689 views • 45 slides

Public Key Cryptography Diffie-Hellman, Discrete Log, RSA

Diffie-Hellman Key Exchange, Discrete Log Problem Public Key Crypto RSA. Public Key Cryptography Diffie-Hellman, Discrete Log, RSA. CSCI283 Fall 2005 GWU. Diffie-Hellman Key Exchange. Diffie-Hellman Key Exchange. Protocol for exchanging secret key over public channel.

810 views • 37 slides

A Unifying Theme

Online Cryptography Course Dan Boneh. Public key encryption from Diffie -Hellman. A Unifying Theme. O ne-way functions (informal). A function f: X ? Y is one-way if There is an efficient algorithm to evaluate f(?), but

240 views • 7 slides