Abstract
The chaos synchronization system used for secrecy communication is considered. The compound system which consists of subsystems is chaos-synchronized. In order to increase the secrecy of models, state of synchronization section is constituted by fuzzy model. Subsystems with the same chaotic dynamics are asynchronous at first. In consideration of the non-linear feedback control is applied to the chaos synchronization control. This control input can be made small by use of the unstable periodic regions. It is important that the mathematical model of the chaos system is not known. However the model known well is used. Using the state of the chaos synchronization section, bifurcation parameter is changed and chaos modulations are performed. The chaos state of the encryption section is used for encryption of information signals. The chaos dynamics of the encryption section is generated using chaos neuron dynamics.
