A novel image encryption algorithm based on genetic recombination and hyper-chaotic systems

Abstract

In this paper, a novel image encryption algorithm based on genetic recombination and hyper-chaotic system is proposed. The basic rules of genetic recombination are employed to scramble images because of its effectiveness. Specifically, the plain image is expanded into two compound images composed of selected four bit-planes and diffuse them at bit-plane level, the compound bit-planes and key streams are reconstructed based on the principles of genetic recombination, then perform traditional diffusion and obtain cipher images. The hyper-chaotic Lorenz system in this algorithm generates pseudorandom sequences in each phase. The experiment results and analysis have proved that the novel image encryption algorithm is effective for image encryption.