Adaptive Sliding Mode Control for the Design of Chaos-Based Secure Communication Systems

In this paper, we study the design of chaos-based secure communication using synchronized master-slave modified Chua’s systems. We propose an adaptive sliding mode control (SMC) law to guarantee synchronization of the master and slave modified Chua’s systems. Particularly, we introduce the concept of extended systems such that a continuous control input is obtained to avoid chattering phenomenon as frequently in the conventional systems with sliding mode control. Then, it becomes possible to ensure that the message signal embedded in the transmitter can be recovered in the receiver. Finally, simulation results demonstrate the SMC-based synchronization scheme’s success in the secure communication application.