ENCRYPTION OF IMAGES BY APPLYING THE CHAOTIC MAPPING: A COMPREHENSIVE SURVEY

Abstract

A novel image encryption algorithm based on the combination of pixel shuffling and three chaotic maps is proposed in this paper. This algorithm is based on pixel scrambling, where the location of the data is scrambled by the randomness of the chaos. Shuffling is used to expand image diffusion and dissipate the high correlation between pixels of the image. Chaotic maps have good potential for designing dynamic permutation maps due to their sensitivity to initial conditions. The plain image is first decomposed into 8x8-size blocks in the proposed algorithm, and then the block-based image shuffling is carried out. After that, using a chaotic sequence generated by another chaotic map, the shuffled image is encrypted. The algorithm proposed was measured through a series of tests in order to evaluate performance. Experimental results show that the system is highly sensitive to key issues and shows good resistance to brute-force and statistical attacks.