Color image encryption scheme combining cross-plane Zigzag scrambling and pseudo-random combination RGB component diffusion

Abstract

At present, the frequency of image transmission in the network has increased many times compared with previous years, and the proportion of color images is the largest. This means that a powerful technology is needed to prevent color images from being stolen to ensure the security of transmission. The excellent characteristics of chaotic cryptography are favored by many scholars. Researchers have designed a series of color image encryption algorithms using this technology. Because of the large number of pixels in the three planes of the color image, some encryption algorithms are guaranteed in security, but the encryption efficiency is often not ideal. In order to avoid this defect as much as possible, this paper develops a new color image encryption scheme on the basis of ensuring the security of the image. First, a cross plane zigzag scrambling process is proposed, which solves the shortage of three planes scrambling separately. Secondly, the rules of pseudo-random combination of three plane pixel values are designed to improve the efficiency and unpredictability of encryption. In addition, the chaotic source selected in this paper is a new one-dimensional sine power parameter map (1D-SPPM). Experiments show that this scheme can resist classical attack types, and compared with some existing schemes, its efficiency and security are guaranteed.