A Novel Image Encryption Scheme Based on Dynamical Multiple Chaos and Baker Map

Chaotic encryption has a series of good characteristics such as sensitivity to initial value, pseudo-random properties and so on. However, the traditional low-dimensional chaotic sequence is truncated because of the limitation of finite precision in computer. Precision degradation has seriously affected the security of encryption. An image encryption scheme based on high-dimensional dynamical multiple chaotic maps is proposed in this paper. In order to produce fast encryption and more avalanche effect, a novel Baker map is utilized to permute the positions of the image pixels in the spatial domain. The experimental results show that it is more efficient than traditional encryption schemes. Compared with simple low-dimensional chaotic system, the proposed scheme does not readily lead to precision degradation and it has passed NIST sp800-22 standards, it provides a secure way for image encryption.