On the use of the unified chaotic system in the field of secure communication

The synchronization of a unified chaotic system, used to encrypt different types of information signals, is investigated in this paper. In the outset, it is proven that such a system possesses three different types of chaos characterizations depending on a system´s parameter, which guarantees a high degree of communication security. Then, the asymptotic convergence of the errors between the states of the master system and those of the slave one is deduced by means of Lyapunov theory. Finally, computer simulations are done to verify the feasibility as well as the efficiency of the proposed theoretical approaches.