Study and practical implementation of a CHUA circuit synchronized between Master-Slave

The Chua circuit is a simple classical electronic circuit exhibiting chaotic behaviour and considered as a true paradigm of chaos in the real world. In this paper, we propose an innovative practical implementation of two Chua circuits in master-slave configuration using the OrCAD environment. An original procedure allowing the mutual synchronisation of these two circuits is developed and experimentally validated. The detailed study of the synchronised behaviour reveals interesting cryptographic properties, in particular a high sensitivity to initial conditions. A final demonstrator consisting of the two synchronised circuits is then produced, characterised and exploited to extract relevant information for innovative chaos-based cryptographic applications. This work opens up promising prospects for the practical use of the Chua circuit, a recognised simple chaotic system, in the development of advanced cryptographic approaches exploiting the unique properties of synchronised chaotic systems.