Abstract
This paper proposes a new image encryption algorithm based on ZigZag transform and LL compound chaotic system. The improved ZigZag transform method and the Lü system are combined to scramble the original image block sub-channel, and complement it by a sorting scrambling algorithm with identification values. LL compound chaotic system is combined with Lü system and logistic chaotic map. It provides a secure and efficient key stream. The new chaotic encryption system destroys the pixel values and finally uses the adjacent-side XOR method to spread. The experimental results and security analysis show that the new algorithm has good encryption effect and can resist common attacks.
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