This paper proposes a new image encryption algorithm, which is based on Logistic chaotic mapping and DNAcoding. A variable parameter logistic mapping coupled chaotic system is proposed to generate pseudo-random sequenceswith good pseudo-random properties. Before encrypting plain-text images, the distinct features of some special imagesare eliminated by superposing them with a pseudo-random image. Combining with DNA encoding operation, anencrypting algorithm of cross-operation of diffusion and permutation is designed. The simulation results show that theproposed algorithm has large key space, high sensitivity to key and plain-text, and good robustness to resist exhaustiveattack, statistic attack, differential attack, etc. It shows that the proposed method has good encryption effect and security.
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