Study Of Chaos Dynamic Properties With Application To Secure Communication

Chaos is suitable for secure communication because of its intrinsic stochastic property. In this paper, in order to prepare the technical basis for designing chaotic secure communication systems with better security, chaos dynamics and chaotic secure communication are surveyed, and the dynamic properties of the typical chaotic systems are analyzed systematically by way of Matlab simulation. First, a detailed analysis of the characteristic of Logistic-Map on theory indicated that Logistic-Map is suitable for secure communication applications, and a chaotic parameter demodulation scheme is designed. The results of the analysis and simulation show that the chaotic communication system possesses good reliability and can be implemented easily . Then, after it studies mainly the amalgamation among chaos dynamics, cryptology and communication technology, a chaotic encryption method is proposed based on computer network communication protocol . The computer experiments for secure communication of digital voice messages, digital image and text are implemented and the results are satisfactory. Finally, the author designs a real-time chaotic secure communication system based on chaotic coding and chaotic synchronization technology. Taking Chua's circuit and a hyperchaos system as examples, the computer simulations disclose the system can overcome the shortage of chaotic masking and improve the security efficiently. Real-time chaotic secure communication system synthesize the new research achievement of nonlinear theory, cryptology and communication technology, and it will be applied widely in the field of information security.