A New Multistage Chaos Synchronized System for Secure Communications

Based on Lyapunov stabilization theorem, considering the diffusionless chaotic system, a method is proposed for global chaos synchronization of three identical systems. Meanwhile, the method of three different structures chaotic systems global synchronization is shown. Then this method is applied to secure communication through chaotic masking, use three coupled identical systems, propose a novel method of chaos encryption, after encrypting in the first two coupled systems, do it again in the later two coupled systems. Simulation results show that the method can realize monotonous synchronization. Further more, the information signal can be recovered undistorted when applying this method to secure communication.