Image encryption algorithm based on improved baker map and spatiotemporal chaos
Wang Yon · Journal of Chongqing University of Posts and Telecommunications · 2015
The limitation of Baker map when it is involved in image encryption is analyzed. To remedy this limitation,the improvements used to partition and permute the image based on bit value are suggested. Moreover,combining with spatiotemporal chaos,a novel image encryption method is proposed. The rules of image partition and changing values of plaintext are determined by the status values of spatiotemporal chaotic system. In the proposed image encryption algorithm,the cipher-texts are feedback to determine the iterate time of spatiotemporal chaos and change the mode of generating sequence of spatiotemporal chaos. The effect of feedback is expanded by iterating the spatiotemporal chaotic system,which enhance the confusion and diffusion of the proposed algorithm. Finally,simulation experiments and comparative analysis show that the proposed algorithm has good performance in security and high potential to be applied to image security.