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This paper describes the security weakness of two generalized nonlinear state-space observers-based approaches for both chaos synchronization and secure communication, using chaotic masking and chaotic modulation of a Lorenz system. We show that the security is compromised without any knowledge of the chaotic system parameter values and even without knowing the transmitter structure.
Circuits and Systems II: Express Briefs, IEEE Transactions on (Volume:51 , Issue: 10 )
Date of Publication: Oct. 2004