An image encryption algorithm based on cascaded chaotic map and staggered combination diffusion
Mingkun Xue, Jiming Zheng · 2023
In this paper, a cascaded chaotic map (SL-L map) is improved to obtained wider chaotic ranges and more complex chaotic behaviors. Using the characteristics of bit plane decomposition, an image encryption algorithm based on improved chaotic map and staggered combination diffusion is designed. Firstly, the plain image is separated into 8 bit-planes by bit plane decomposition, and 4 bit-planes are formed by staggered combination. Then the improved Zigzag transform and bit-level diffusion are used to complete the permutation and diffusion respectively. Finally, the encryption is completed by using chaotic sequence to control plane synthesis. Simulation results and security analysis show that the algorithm can effectively resist various typical attacks.