Encryption algorithms using chaos and CAT methodology

As the reason of image encryption algorithm of high iteration and low-key encryption-dimensional discrete chaotic space, this paper proposed a CAT methodology combining Chaos to discrete images. The using of map cyclical changes in the image is encrypted by different-sized images of different encryption cycle. After experiments the results show that this encryption algorithm using Chaos and CAT can effectively encrypt images. This algorithm can also obtain the best parameters to achieve the best image encryption effect.