Abstract:
A chaotic synchronized secure communication scheme based on Lorenz equations using active-passive decomposition, with time-varying behavior, is designed in this paper. The methods to amplify the synchronized error and to decrease the cross correlation are proposed to generate the encryption variables which are very sensitive to parameters. Lorenz equations with time-varying parameters are established by applying parameter perturbation technique so that the scheme is safe to synchronization-based parameter estimation. The computer simulation results show that it has good synchronization properties while its sensitivity to parameters is raised greatly. It is secure since it has the capacity to resist chaotic unmasking, noise filter, and synchronization-based parameter estimation.