An image encryption scheme combining chaos with cycle operation for DNA sequences |
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Authors: | Ting Hu Ye Liu Li-Hua Gong Chun-Juan Ouyang |
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Affiliation: | 1.Department of Electronic Information Engineering,Nanchang University,Nanchang,China;2.Key Laboratory of Watershed Ecology and Geographical Environment Monitoring of NASG,Jinggangshan University,Ji’an,China |
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Abstract: | 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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