A chaotic image encryption scheme owning temp-value feedback |
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| Institution: | 1. Department of Electronic Engineering, City University of Hong Kong, Hong Kong, China;2. State Grid Electric Power Research Institute, Beijing 100192, China;3. College of Information Engineering, Xiangtan University, Xiangtan 411105, Hunan, China;1. Institute of Electronics and Mechanical Engineering, Yuri Gagarin State Technical University of Saratov, Polytechnicheskaya 77, Saratov 410054, Russia;2. Department of Nonlinear Processes, Saratov State University, Astrakhanskaya 83, Saratov 410012, Russia;1. Dpto. de Matemàtica Aplicada I, Universitat Politècnica de Catalunya, Escola Tècnica Superior d’Enginyeria Industrial de Barcelona, Diagonal 647, E-08028 Barcelona, Spain;2. Dpto. de Matemática Aplicada, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain;1. Department of Applied Mathematics, Western University London, Ontario N6A 5B7, Canada;2. Department of Mathematics, Shanghai Maritime University, Shanghai 201306, China |
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| Abstract: | 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. |
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| Keywords: | Image encryption Chen system Logistic map Permutation Diffusion |
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