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Synchronization of spatiotemporal chaotic systems and application to secure communication of digital image |
| Wang Xing-Yuan, Zhang Na, Ren Xiao-Li, Zhang Yong-Lei |
| Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China |
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Abstract Coupled map lattices (CMLs) are taken as examples to study the synchronization of spatiotemporal chaotic systems. In this paper, we use the nonlinear coupled method to implement the synchronization of two coupled map lattices. Through the appropriate separation of the linear term from the nonlinear term of the spatiotemporal chaotic system, we set the nonlinear term as the coupling function and then we can achieve the synchronization of two coupled map lattices. After that, we implement the secure communication of digital image using this synchronization method. Then, the discrete characteristics of the nonlinear coupling spatiotemporal chaos are applied to the discrete pixel of the digital image. After the synchronization of both the communication parties, the receiver can decrypt the original image. Numerical simulations show the effectiveness and the feasibility of the proposed program.
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Received: 11 August 2010
Revised: 03 October 2010
Published: 15 February 2011
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PACS:
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05.45.Jn
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(High-dimensional chaos)
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05.45.Xt
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(Synchronization; coupled oscillators)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 60573172 and 60973152), the Doctoral Program Foundation of Institution of Higher Education of China (Grant No. 20070141014), and the Natural Science Foundation of Liaoning Province, China (Grant No. 20082165). |
Cite this article:
Wang Xing-Yuan, Zhang Na, Ren Xiao-Li, Zhang Yong-Lei Synchronization of spatiotemporal chaotic systems and application to secure communication of digital image 2011 Chin. Phys. B 20 020507
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