An Image Encryption Scheme Based on 4D Chaotic System and Permutation-diffusion Operations
Jingxuan Ni, Yuhan Tang, Ruisong Ye · 2022
The security of information transmission is a hot issue in the information industry. Chaotic dynamical systems have been widely applied in the field of image encryption because of its excellent characteristics. A novel image encryption scheme using improved chaotic sequences yielded by one 4D chaotic dynamical system is proposed. Firstly, the discrete sequences generated are improved to make them have better chaotic natures. Secondly, the improved chaotic sequences are used to control the permutation operation of plain-image, which disrupts the pixel positions and reduces the correlation of adjacent pixels. Finally, the permuted image is diffused twice by bitwise XOR operation with the key streams derived from the improved quantized chaotic sequences to get the cipher-image. The detailed performance analysis is carried out, including histogram analysis, information entropy analysis, adjacent pixel correlation analysis, plaintext sensitivity analysis, and so on. Experimental results show that the proposed image encryption scheme has high security and can resist various classical attacks. It is suitable for many application fields, such as confidential video conference, pay TV, military image database, enterprise secret storage, online private album and so on.