Cryptanalysis of Stream Cipher Cryptosystem Based on Soft Computing Techniques
Prof .DrSalim Ali Abbas Al-Ageelee, RiyamNoori Jwad · IOSR Journal of Computer Engineering · 2017
This paper presents a new investigation for cryptanalysis stream cipher based on Genetic Algorithm(GAs), Particle Swarm Optimization (PSO).GA and PSO utilized for the automatic recovery of the key, and hence the plaintext.Based on a mathematical model, it is shown that such algorithms can be used to reduce the number of trials which are needed to determine the initial state of the attacked generator using ciphertext only attack.Thesealgorithms have been shown to be effective at finding optimal solutions.Experimental results show the ability of GA and PSO in finding the correct secret key which is used to recover the plaintext.