Ashok K. Bhateja

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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(More)
Lately researches are going on to combine both cryptography and biometric systems for more reliability and security of a system. It can be accomplished using fuzzy vault technique. Fuzzy vault stores the secret key. Unlocking phase of fuzzy vault is based on construction of polynomial over a finite field system GF(2<sup>n</sup>). As the size of a key(More)
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