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Extracting Messages Masked by Chaotic Signals of Time-delay Systems

Changsong Zhou·C. -H. Lai
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Abstract

We show how to extract messages masked by a chaotic signal of a time-delay system with very high dimension and many positive Lyapunov exponents. Using a special embedding coordinate, the infinite dimensional phase space of the time-delay system is projected to a special three-dimensional space, which enables us to identify the time-delay of the system from the transmitted signal, and reconstruct the chaotic dynamics to unmask the hidden message successfully. The message extraction procedure is illustrated by simulations with Mackey-Glass time-delay system for two type of masking schemes and different kinds of messages.

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Changsong Zhou, C. -H. Lai. 2000-05-08. Extracting Messages Masked by Chaotic Signals of Time-delay Systems. https://arxiv.org/abs/nlin/0005015

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