Encryption of Color image to enhance security using Permutation and Diffusion Techniques

Abstract

The image encryption technique based on Chaotic Map andHenon map is proposed in this paper. The main idea is that the original color image undergoes permutation and diffusion process. With the help of chaotic sequence from the chaotic map, each pixel in the original image randomly shuffled and that will reduce the correlation among the adjacent pixels. In the diffusion operation, permuted image is XORed with chaotic sequence and henon sequence from the henon map. The capability of the proposed approach to competentlyproduce cipher images with very low correlation coefficients of adjacent pixels is demonstrated through experimental results for several color images. This is also shown that the proposed approach is very sensitive to any slight changes in the secret key values.