Synchronization between chaotic systems has received considerable attention and led to communication applications. There are two major methods for coupling and synchronizing identical chaotic systems, the cascading method and the one-way coupling method. With these methods, a message signal sent by a transmitter system can be reproduced at a receiver under the influence of a single chaotic signal through synchronization.; This thesis presents the study of numerical simulation and circuit simulation of chaos synchronization for a number of chaotic systems, including autonomous and non-autonomous (periodically forced) systems. Synchronization properties such as robustness and parameter sensitivity are investigated, and the application in signal masking and recovery is also studied. For some systems, the synchronization is quite robust to perturbation and also it is quite sensitive to parameters. In particular, a new nonautonomous chaotic system, based on an augmented Duffing (ADF) circuit, is developed and it appears to be very noise-resistant and very sensitive to variations of parameters. Hence, this system may be effectively used in signal and image masking and transmission. Some results in real circuit experiments and visual image processing are also presented.
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