Applying Genetic Algorithms for Searching Key-Space of Polyalphabetic Substitution Ciphers

Ragheb Toemeh¹ and Subbanagounder Arumugam²

¹Department of Computer Science and Engineering, Government College of Technology, India

²Directorate of Technical Education, India

Abstract: In this paper the Cryptanalysis of polyalphabetic by applying Genetic algorithm is presented. The applicability of Genetic algorithms for searching the key space of encryption scheme is studied. In Vigenere cipher, guessing the key size is done by applying Genetic Algorithm. The frequency analysis is used as an essential factor in objective function.

Keywords: Polyalphabetic cipher, Vigenere cipher, genetic algorithm.