'Network security essentials' diaporamas de présentation

Network Security Essentials

Network Security Essentials. Fifth Edition by William Stallings. Chapter 2. Symmetric Encryption and Message Confidentiality. Some Basic Terminology. Plaintext - original message Ciphertext - coded message Cipher - algorithm for transforming plaintext to ciphertext

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Network Security Essentials

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Computer Security

Computer Security . CIS326 Dr Rachel Shipsey. This course will cover the following topics:. passwords access controls symmetric and asymmetric encryption confidentiality authentication and certification security for electronic mail key management.

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Feistel Model

CS 465. Feistel Model. Last Updated: Aug 27, 2013. Feistel Cipher Structure. Described by Horst Feistel (IBM) in 1973 Many symmetric encryption algorithms use this structure DES, IDEA, Blowfish, RC6, MARS, Twofish Not AES Substitution-permutation network Block cipher

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