On Certain Approaches for Analysis and Design of Cryptographic Techniques for Symmetric Encryption and Key Management

Abstract

This chapter yields a review of certain mathematical approaches for analysis and design of the basic cryptographic elements for establishing information security in information-communication systems. The following two topics are addressed: selected issues on stream ciphers for encryption and key management based on broad-cast encryption. Certain coding related issues for security evaluation and design of stream ciphers are considered. The discussed security evaluation techniques corresponding to decoding approaches include one-step and iterative decoding paradigms, and the addressed design issues involve homophonic coding for joint employment of pseudo-randomness and randomness. Elements for cryptographic security evaluation and advanced design of the key managements based on broadcast encryption are pointed out.