摘要：In this paper, the historical process of chaotic image encryption algorithm is introduced. Classical Logistic chaotic system and piecewise linear chaotic map (PWLCM) are fused to form a novel chaotic system LPW. Based on LPW chaotic system, a snake encryption algorithm for digital image with multiple chaotic fusion is proposed. The algorithm carries out three rounds of image encryption, including forward crawling, reverse crawling and hibernation of snakes. The encryption of the algorithm uses the diffusion algorithm associated with the plain and the single row non-repetitive scrambling algorithm, and performs the scrambling and diffusion processes simultaneously. Experimental results show that the algorithm has high security, fast encryption and decryption speed, larger key space, and can resist common attacks such as differential attack and separate attack of scrambling and diffusion.
