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Smooth Adaptive Sliding Mode Observers in Uncertain Chaotic Communication

Raoufi, R. and Zinober, A.S.I. (2007) Smooth Adaptive Sliding Mode Observers in Uncertain Chaotic Communication. International Journal of Systems Science, 38 (11). pp. 931-942. ISSN 0020-7721

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Abstract

We study the performance of adaptive sliding mode observers (ASMO) in chaotic synchronization and communication in the presence of uncertainties. The proposed robust adaptive observer-based synchronization is used for cryptography based on non-linear chaotic masking modulation (NCM). Uncertainties are intentionally injected into the chaotic dynamical system to achieve higher security and we use robust sliding mode observer design methods for the uncertain non-linear dynamics. In addition, a relaxed matching condition and a boundary layer smooth gain are introduced to realize the robust observer design more feasibly. A brief study in introducing an alternative augmented ASMO-based chaotic communication configuration will be discussed. Finally, a Lorenz system is employed as an illustrative example to demonstrate the effectiveness and feasibility of the proposed cryptosystem.

Item Type: Article
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield)
Depositing User: Mrs Megan Hobbs
Date Deposited: 22 Mar 2010 15:48
Last Modified: 07 Jun 2010 11:09
Published Version: http://dx.doi.org/10.1080/00207720701679973
Status: Published
Publisher: Taylor & Francis
Identification Number: 10.1080/00207720701679973
URI: http://eprints.whiterose.ac.uk/id/eprint/10640

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