On the Application of Evolutionary Computation Techniques in Designing Stream Cipher Systems

Abstract

Encryption is an important mechanism used to protect private information from unauthorized access. Thus, cipher systems play an important role in the communication and storage systems. But, designing a cipher system of good properties, such as high degree of security and efficiency, is a complex process. Therefore, this paper considers this problem, and presents an attempt to find a general approach for designing good cipher systems automatically. In this paper we focus on an important class of cipher systems which is stream ciphers. The proposed approach is based on the evolutionary computation techniques, and the method chosen here is the simulated annealing programming which is an integration of genetic programming and simulated annealing algorithm. The proposed algorithm has been implemented in order to test its effectiveness in solving the underlying problem.