In order to enhance the security of chaotic encryption, a dynamic encryption algorithm based on chaotic discretemap. The algorithm USES two chaotic cascade subsystems. Subsystem consists of simple chaotic mapping, its outputwith the addition of plaintext modulus after generating cipher text, and subsystem number of iterations is dynamicchange, increase the unpredictability of cipher text. Simulation and safety analysis show that the algorithm of the keyspace is large, is sensitive to plaintext and key, can effectively resist by difference features and statistical characteristics,the phase space reconstruction.
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