期刊
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
卷 19, 期 10, 页码 3653-3659出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cnsns.2014.03.016
关键词
Image encryption; Chen system; Logistic map; Permutation; Diffusion
类别
资金
- technology project of State Grid of China [XX17201200048]
Many round-based chaotic image encryption algorithms employ the permutation-diffusion structure. This structure has been found insecure when the iteration round is equal to one and the secret permutation of some existing schemes can be recovered even a higher round is adopted. In this paper, we present a single round permutation-diffusion chaotic cipher for gray image, in which some temp-value feedback mechanisms are introduced to resist the known attacks. Specifically, we firstly embed the plaintext feedback technique in the permutation process to develop different permutation sequences for different plain-images and then employ plaintext/ciphertext feedback for diffusion to generate equivalent secret key dynamically. Experimental results show that the new scheme owns large key space and can resist the differential attack. It is also efficient. (C) 2014 Elsevier B.V. All rights reserved.
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