A novel image block cryptosystem based on a spatiotemporal chaotic system and a chaotic neural network  被引量:1

A novel image block cryptosystem based on a spatiotemporal chaotic system and a chaotic neural network

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作  者:王兴元 鲍雪梅 

机构地区:[1]Faculty of Electronic Information and Electrical Engineering,Dalian University of Technology

出  处:《Chinese Physics B》2013年第5期232-240,共9页中国物理B(英文版)

基  金:Project supported by the National Natural Science Foundation of China (Grant Nos. 61173183, 60973152, and 60573172);the Doctoral Program Foundation of Institution of Higher Education of China (Grant No. 20070141014);the Program for Excellent Talents in Universities of Liaoning Province, China (Grant No. LR2012003);the Natural Science Foundation of Liaoning Province, China (Grant No. 20082165);the Fundamental Research Funds for the Central Universities of China (Grant No. DUT12JB06)

摘  要:In this paper, we propose a novel block cryptographic scheme based on a spatiotemporal chaotic system and a chaotic neural network (CNN). The employed CNN comprises a 4-neuron layer called a chaotic neuron layer (CNL), where the spatiotemporal chaotic system participates in generating its weight matrix and other parameters. The spatiotemporal chaotic system used in our scheme is the typical coupled map lattice (CML), which can be easily implemented in parallel by hard- ware. A 160-bit-long binary sequence is used to generate the initial conditions of the CML. The decryption process is symmetric relative to the encryption process. Theoretical analysis and experimental results prove that the block cryptosys- tem is secure and practical, and suitable for image encryption.In this paper, we propose a novel block cryptographic scheme based on a spatiotemporal chaotic system and a chaotic neural network (CNN). The employed CNN comprises a 4-neuron layer called a chaotic neuron layer (CNL), where the spatiotemporal chaotic system participates in generating its weight matrix and other parameters. The spatiotemporal chaotic system used in our scheme is the typical coupled map lattice (CML), which can be easily implemented in parallel by hard- ware. A 160-bit-long binary sequence is used to generate the initial conditions of the CML. The decryption process is symmetric relative to the encryption process. Theoretical analysis and experimental results prove that the block cryptosys- tem is secure and practical, and suitable for image encryption.

关 键 词:image encryption block cryptosystem chaotic neural network coupled map lattice 

分 类 号:TN918.1[电子电信—通信与信息系统] O415.5[电子电信—信息与通信工程]

 

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