Design of a new multistage chaos synchronized system for secure communications and study on noise perturbation

Based on the Lyapunov stabilization theorem, a new method of global chaos synchronization among three different structures chaotic systems is proposed under the framework of drive–response systems. Then this method is applied to secure communication through chaotic masking. Using three coupled identical systems, proposes a novel method of chaos encryption, after encrypting in the first two coupled systems, encrypt again in the later two coupled systems. In consideration of interfering Gauss white noise, the results of encoding and decoding are simulated and analyzed. The characteristics of noise are analyzed and then a de-noising method using wavelet transform is presented. With Matlab, the effects of signal de-noising could be demonstrated.