Abstract

Secure communication based on unified chaotic systems with varying parameters is discussed. A controller to achieve quickly adaptive synchronization of unified chaotic systems with varying parameters is presented. An adaptive secure communication method based on chaotic masking technology is derived. Owing to varying parameters of unified chaotic systems, the drive chaotic system can change the chaotic motion morphology actively, and the response system can adaptively track the actively changeable drive chaotic system. So communication security is enhanced. In addition, the function transformation for useful signal is applied to enhance communication security further. Simulations show that the response systems can adaptive track quickly the actively changeable drive chaotic system. And the useful signal can be recovered from the receiver effectively.

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