Abstract:

A secure communication scheme based on the asymmetric structure of chaotic signal generators of the transmitter and the receiver is proposed. On the basis of the error-feedback synchronization theory, chaotic signal generators with different special auxiliary networks are respectively designed for both the transmitter and the recei-ver.Only by knowing the parameters of the original chaotic system ,the constitutions of the special auxiliary net-work and the transmitted signal,the receiver can reconstruct the chaotic system,design coresponding auxiliary network,abstract chaotic signals for the encryption and obtain the demodulation message.The simulated results show that the special auxiliary networks in the receiver and the transmitter enhance the security of the secure communica-tion system,thus resulting in excellent noise robustness of the system.

Key words: secure communication, chaos, signal generator, eror feedback