Chaotic Dynamics And Its Application In Information Security

A new safer and complicated hyper-chaotic system is presented in this paper. The complicated dynamic behavior is studied when the parameters are given, and the oscillator circuit of the chaotic system is designed. From the theoretical analysis and the numerical simulation of the new chaotic system, it has all the characteristics of chaotic systems. But its Lyapunov exponents are bigger and it has a brand frequency spectral.The four-dimensional hyper-chaotic system is applied to the information security technology. A method of the chaotic stream cipher sequence generation is presented. The random verification, sensitivity analysis and sensitivity analysis of the chaotic sequence are studied. It is proved that the method can produce good random sequences. Finally, the image encryption algorithm based on the hyper-chaotic system is presented, using the improved chaotic sequence directly to change the pixel location and gray-scale values. The simulation experiments show that the advantages of the algorithm are simple, fast, high security and so on.