Color image encryption algorithm based on 3D Zigzag transformation and view planes

To prevent the information leak of image content, image encryption technology has received increasing attention. The proposed algorithm adopts a diffusion-permutation-diffusion structure. Inspired by the three-view drawing in the engineering field, the view planes of color image are defined in this paper and applied in both diffusion stages. At the permutation stage, a 3D Zigzag transformation is proposed to destroy the correlation among R, G, B components. Moreover, we combine two chaotic systems as a new pseudo-random number generator (PRNG). Experiments and algorithm analyses indicate that the proposed algorithm has strong security and desirable performance.