A new compound mode of confusion and diffusion for block encryption of image based on chaos |
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| Institution: | 1. Control and Modelling Group (GCOM), Department of Electrical Engineering, Federal University of São João del-Rei, São João del-Rei, MG, 36307-352, Brazil;2. Department of Electronic Engineering, Federal University of Minas Gerais, Belo Horizonte, 31270-901, MG, Brazil;3. Youth Research Institute, Saint-Petersburg Electrotechnical University, LETI, 5, Professora Popova st., Saint Petersburg 197376, Russia;1. School of Electronic & Information Engineering, Dalian University of Technology, Dalian 116024, China;2. College of Software, Henan University, Kaifeng 475004, China;3. School of Information Science & Technology, Xiamen University Tan Kah Kee College, Zhangzhou, China |
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| Abstract: | A block encryption for image using combination of confusion and diffusion is proposed in this paper. In this encryption, a new compound mode is proposed. Baker map is used to generate a pseudo-random sequence, and several one-dimension chaotic maps are dynamically selected to encrypt blocks of image, in the order of the pseudo-random sequence generated by Baker map. Different with other combined encryptions, the algorithm of this encryption does not confusion original image directly, but generate a pseudo-random, which is used as a route for diffusion, combines pixels to block randomly and arrays them. When diffusion is executing, for mutual diffusion of pixels, the confusion is working by the pseudo-random order of route, the combination is deep-seated. |
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