Digital Image Encryption and Decryption Algorithm Based on Optimization and Fusion Strategy

Abstract

Digital image chaotic system has the characteristics of large key space and strong anti-plaintext attack, so it has become a hot research topic in recent years. At present, there are still two important problems to be solved. One is that the chaos degree of chaotic sequence is not enough due to improper selection of initial parameters and the other is easy to solve by using chaotic encryption and decryption alone. In this paper, a digital image encryption and decryption algorithm based on optimization and fusion strategy is proposed. Firstly, the parameters of chaos parameters are optimized by genetic algorithm to obtain a better chaotic Logistic mapping encryption relationship. Then, the fusion encryption is carried out by two-level permutation and one-level diffusion technology. Finally, the corresponding decryption algorithm is given in this paper. Through the test of various Performance evaluation indexes, the rationality and validity of the proposed algorithm are verified.electronic document is a "live" template. The various components of your paper [title, text, heads, etc.] are already defined on the style sheet, as illustrated by the portions given in this document.