A New Keystream Generator Based on Swarm Intelligence

Abstract

Advances in the design of keystream generator using swarm intelligence techniques arereported.In this paper particle swarm optimization algorithm for generating random keystreamwith large complexity is presented. Particle swarm technique is adapted to locate therequirements(larg period ,larg linear complexity, good randomness and high order ofcorrelation immunity). The definitions for some cryptographic properties are generalized,providing a measure suitable for use fitness function in a particle swarm algorithm, seekingrandomness that satisfy both correlation immunity and the large linear complexity. Results arepresented demonstrating the effectiveness of the proposed method.