Abstract
With the exponential growth of networked system and application such as Commerce, the demand for effective internet security is increasing. Cryptology is the science and study of systems for secret communication. It consists of two complementary fields of study: cryptography and cryptanalysis. In this paper, we propose a cryptanalysis method based on Genetic Algorithm and Tabu Search to break a Mono-Alphabetic Substitution Cipher. We will also compare and analyze the performance of these algorithms in automated attacks on a Mono-Alphabetic Substitution Cipher. The use of Tabu Search is a largely unexplored area in the field of Cryptanalysis. A generalized version of these algorithms can be used for attacking other cipher as well.
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