A Novel Image Secret Sharing Scheme without Third-Party Scrambling Method

Values such as cellular sum in initial configurations and neighbor radius can potentially affect confusion and diffusion in cellular automata. Specifically, both confusion and diffusion characteristics in cellular automata usually are not sufficient to break up the high correlation between the secret image pixels when these two parameters are too small. Thus, using only One-Dimensional Reversible Memory Cellular Automata (ODRM-CA) to generate shadow images will lead to the leakage of original secret image's information by some shadow images. In order to solve this problem, in this paper, we propose an image secret sharing (ISS) scheme with no third-party scrambling method. This is realized by increasing the values of cellular sum and neighbor radius to implement the scrambling process for the secret image, thus both processes of image scrambling and image secret sharing can be achieved by ODRM-CA. Experimental results show that this scheme can generate strong random shadow images to avoid leaking information of the original secret image.