期刊名称：International Journal on Computer Science and Engineering
印刷版ISSN：2229-5631
电子版ISSN：0975-3397
出版年度：2013
卷号：5
期号：5
页码：422-429
出版社：Engg Journals Publications
摘要：Vigenere cipher is a polyalphabetic substitution cipher with a very large key space. In this paper we have investigated the use of PSO for the cryptanalysis of vigenere cipher and proposed PSO with Markov chain random walk in which some of the worst particles are replaced with new better random particles to enhance the efficiency of PSO algorithm. Based on our experimental results, it is shown that the proposed algorithm is more effective than PSO for the analysis of Vigenere cipher.
关键词：Cryptanalysis; Vigenere cipher; Particle Swarm Optimization; Markov chain; random walk.
