期刊
NONLINEAR DYNAMICS
卷 87, 期 1, 页码 51-66出版社
SPRINGER
DOI: 10.1007/s11071-016-3024-6
关键词
Image encryption; Lorenz system; Chen's hyper-chaos; Cycle operation; DNA sequences
资金
- National Natural Science Foundation of China [61462061, 61262084]
- China Scholarship Council [201606825042]
An image encryption scheme is proposed using high-dimensional chaotic systems and cycle operation for DNA sequences. In the scheme, the pixels of the original image are encoded randomly with the DNA coding rule controlled by a key stream produced from Chen's hyper-chaos. In addition to confusion on the DNA sequence matrix with Lorenz system, a cycle operation for DNA sequences is projected to diffuse the pixel values of the image. In order to enhance the diffusion effect, a bitwise exclusive-OR operation is carried out for the decoded matrices with a binary key stream, and then the cipher-image is obtained. Simulation results demonstrate that the proposed image encryption scheme with acceptable robustness is secure against exhaustive attack, statistical attack and differential attack.
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