An Asymmetric Image Cryptosystem Based on the Adaptive Synchronization of an Uncertain Unified Chaotic System and a Cellular Neural Network

doi:10.1016/j.cnsns.2013.02.011

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題名:	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
貢獻者:	淡江大學資訊管理學系
關鍵詞:	Asymmetric image cryptosystem;Adaptive synchronization;Chaotic systems;Unified chaotic system;Cellular neural networks
日期:	2013-10
上傳時間:	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
顯示於類別:	[資訊管理學系暨研究所] 期刊論文

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