In recent years, a growing number of cryptosystems based on chaos have been proposed, however, most of them encounter with some problems such as: low level of security and small key space. Chaotic maps have good properties such as ergodicity, sensitivity to initial conditions and control parameters, etc. Due to these features, they are good candidate for information encryption. In this paper, encryption based on the Polynomial Chaotic Maps (PCMs) is proposed. The theoretic and simulation results state that the proposed algorithm has many properties such as high speed and large key space and high security. Therefore it is suitable for practical use in the secure communications.
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