Concepts and principles of cryptography and data security. Cryptography (secret codes): principles of secrecy systems; classical cryptographic systems, including Vigen\o'e\`'re and Vernam ciphers; the Data Encryption Standard (DES); public-key encryption; privacy-enhanced email; digital signatures. Proprietary software protection; information theory and number theory; complexity bounds on encryption; key escrow; traffic analysis; attacks against encryption; basic legal issues; e-commerce; the role of protocols.

Usually Offered:	Spring
Credit:	3 hours (class)
Prerequisite:	MA 351, CS 251, CS 381, and CS 426, or equivalent
University Catalog:	CS 555
Schedule:	Spring 2008 Instructor: Mike Atallah