To improve the randomness of chaotic systems, two chaotic systems with anti-structures have been proposed that are combined into a new automatic switching chaotic system by virtue of a switching function. The basic dynamic behaviors and rich chaotic characteristics of the switched chaotic system are analyzed upon studying the stability of the equilibrium point, chaotic attractor phase diagram, Lyapunov exponent spectrum, bifurcation diagram, Poincaré cross section and power spectrum of the system. With the help of the calculation of the spectral entropy complexity (SE) and C0 complexity, the complexity of switched chaotic system is proved to be substantially higher than that of the sub-chaotic system. Based on Multisim software, the analog circuit simulation experiment of the system is designed. The simulation results show that the switched system is feasible. The synchronization of the two systems is realized by the coupling synchronization method, and it is applied to the chaotic masking secure communication. The experimental results show that this method is feasible and effective.
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