Abstract
The chaos synchronization system used for secrecy communication is considered. The compound system which consists of subsystems is chaos-synchronized. And, subsystems with the same chaotic dynamics are asynchronous at first. Furthermore, the noise which exists between subsystems invades into the control input of the chaos synchronization additionally. In consideration of the noise, the sliding mode control is applied to the chaos synchronization control. Then, the manipulated variable for the chaos synchronization can be made a little by using chaotic characteristic of the subsystems.
