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Breaking two secure communication systems based on chaotic masking

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4 Author(s)
Alvarez, G. ; Instituto de Fisica, Consejo Superior de Investigaciones Cientificas, Madrid, Spain ; Montoya, F. ; Romera, M. ; Pastor, G.

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.

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Circuits and Systems II: Express Briefs, IEEE Transactions on  (Volume:51 ,  Issue: 10 )