A Novel Image Parallel Chaotic Encryption Algorithm Based on Block Operation
Yuhui Xie, Yufu Zheng, Jing Lian · 2023
Aiming at the problem of image security reduction caused by block encryption, a novel image chaotic encryption algorithm based on block operation is proposed. The algorithm optimizes the existing block scrambling operation before encryption, generates reasonable block rules through chaotic sequences, and improves the efficiency and security of block scrambling algorithm. In addition, the diffusion key based on chaotic sequence is reassembled bit by bit in the diffusion stage to improve the strength of the diffusion key and further increase the degree of ciphertext chaos. The simulation results show that the proposed method has improved security evaluation indexes such as entropy, anti-difference performance, correlation between adjacent pixels and anti-clipping performance, and the algorithm has better performance.