Analysis and Improvement for Image Encryption Algorithm Based on Multiple Chaotic Mapping

ABSTRACT

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

Keywords: