Novel communication scheme based on chaotic R�ssler circuits

We present a novel synchronization scheme for secure communication with two chaotic unidirectionally coupled R�ssler circuits. The circuits are synchronized via one of the variables, while a signal is transmitted through another variable. We show that this scheme allows more stable communications. The system dynamics is studied numerically and experimentally in a wide range of a control parameter. The possibility of secure communications with an audio signal is demonstrated. � 2005 IOP Publishing Ltd