An efficient pixel-level chaotic image encryption algorithm

作者：Ye, Guodong^*; Pan, Chen; Huang, Xiaoling; Mei, Qixiang

来源：Nonlinear Dynamics, 2018, 94(1): 745-756.

DOI：10.1007/s11071-018-4391-y

• PRD
• Pixel-level
• Chaotic map
• Encryption algorithm
• Security

In this paper, a new and efficient pixel-level image encryption algorithm is presented. In contrast to the traditional permutation-diffusion architecture, the proposed method enhances the connection between position shuffling for pixels and value changing for grayness. As a result, the separate attack becomes more difficult when attacking our structure of permutation-rewriting-diffusion (PRD). Before the diffusion operation, a rewriting function is applied to the permuted image in a simple way, which can be seen as a remedy for permutation's inability to change the frequency of pixels. Moreover, the keystream is designed dependent upon the plain-image. Therefore, the proposed method can disturb the chosen plain-image and known plain-image attacks. Experimental results together with security analysis also show good efficiency of the PRD mechanism. Compared to some bit-level-based image encryption algorithms, our method shows increased faster speed and satisfies the performance requirements of real-time communication.

• 出版日期2018-10
• 单位浙江大学; 广东海洋大学