Image Encryption Algorithm Based on S-boxes Substitution and Chaos Random Sequence

Abstract

The purpose of this paper is to improve the security and the anti-errors-proliferation character of image encryption. Based on the theory of S-box in AES, we put forward a new standard algorithm. After that, by introducing the chaos random sequence, two improved image encryption algorithms were created. The method used by the first one was that a variety of S-boxes were selected for the substitution of each byte. The method used by the second one was that the encryption included multiple rounds of S-boxes substitution. In addition, the sequences of S-boxes in two algorithms were both decided by the chaos random sequence. Afterwards, we applied the three algorithms to the specific examples in order to testify the strength and the anti-errors-proliferation character of the encryption. Consequently, we have a conclusion that the new improved image encryption algorithms could effectively improve the inefficiency and the anti-errors-proliferation character of image encryption algorithm and be easy to implement.