Decoding Information by Following Parameter Modulation With Parameter Adaptive Control

Details Decoding Information by Following Parameter Modulation With Parameter Adaptive Control Decoding Information by Following Parameter Modulation With Parameter Adaptive Control

2000-05-08

arxiv.org/abs/nlin/0005016v1

Physical Review E, Vol 59, No. 6, pp. 6629-6636 (1999)

Nonlinear Sciences

Chaotic Dynamics

13 pages, 13 figures

Scientific paper

It has been proposed to realize secure communication using chaotic synchronization via transmission of binary message encoded by parameter modulation in the chaotic system. This paper considers the use of parameter adaptive control techniques to extract the message, based on the assumptions that we know the equation form of the chaotic system in the transmitter but do not have access to the precise values of the parameters which are kept secret as a secure set. In the case that a synchronizing system can be constructed using parameter adaptive control by the transmitted signal and the synchronization is robust to parameter mismatches, the parameter modulation can be revealed and the message decoded without resorting to exact parameter values in the secure set. A practical local Lyapunov function method for designing parameter adaptive control rules based on originally synchronized systems is presented.

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