Experimental demonstration of bidirectional chaotic communication by means of isochronal synchronizationA. Wagemakers, J. M. Buldú and M. A. F. Sanjuán
Nonlinear Dynamics and Chaos Group, Departamento de Física, Universidad Rey Juan Carlos Tulipán s/n, 28933 Móstoles, Madrid, Spain
received 17 September 2007; accepted in final form 17 December 2007; published February 2008
published online 21 January 2008
We give the first experimental demonstration of simultaneous bidirectional communication through chaotic carriers thanks to the phenomenon of isochronal synchronization. Two Mackey-Glass electronic circuits with chaotic behaviour exchange their signals through a coupling line with delay. When the internal feedback of the circuits and the coupling are accurately matched, isochronal synchronization arises. Under this dynamical regime, we introduce a binary message at both outputs and recover it at the opposite circuit. Finally, we discuss the security of this kind of communication system by analyzing the message recovered by a potential eavesdropper.
05.45.Xt - Synchronization; coupled oscillators.
42.55.Px - Semiconductor lasers; laser diodes.
42.65.Sf - Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics.
© EPLA 2008