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    题名: An Asymmetric Image Cryptosystem Based on the Adaptive Synchronization of an Uncertain Unified Chaotic System and a Cellular Neural Network
    作者: Cheng, Chao-Jung;Cheng, Chi-Bin
    贡献者: 淡江大學資訊管理學系
    关键词: Asymmetric image cryptosystem;Adaptive synchronization;Chaotic systems;Unified chaotic system;Cellular neural networks
    日期: 2013-10
    上传时间: 2013-02-21 09:06:28 (UTC+8)
    出版者: Amsterdam: Elsevier BV
    摘要: Chaotic dynamics provide a fast and simple means to create an excellent image cryptosystem, because it is extremely sensitive to initial conditions and system parameters, pseudorandomness, and non-periodicity. However, most chaos-based image encryption schemes are symmetric cryptographic techniques, which have been proven to be more vulnerable, compared to an asymmetric cryptosystem. This paper develops an asymmetric image cryptosystem, based on the adaptive synchronization of two different chaotic systems, namely a unified chaotic system and a cellular neural network. An adaptive controller with parameter update laws is formulated, using the Lyapunov stability theory, to asymptotically synchronize the two chaotic systems. The synchronization controller is embedded in the image cryptosystem and generates a pair of asymmetric keys, for image encryption and decryption. Using numerical simulations, three sets of experiments are conducted to evaluate the feasibility and reliability of the proposed chaos-based image cryptosystem.
    關聯: Communications in Nonlinear Science and Numerical Simulation 18(10), pp.2825–2837
    DOI: 10.1016/j.cnsns.2013.02.011
    显示于类别:[資訊管理學系暨研究所] 期刊論文


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