一种超混沌混合保密通信方案

本文将超混沌系统单变量单向耦合同步方法与两信道保密通信方案相结合，给出了一种双信道超混沌混合保密通信方案。发送端利用超混沌振荡器的一个或多个状态产生混沌密钥和遮掩信号，对信息信号先加密再遮掩，获得加密信号后使用一个信道传输；利用另一信道传输实现超混沌系统同步的单变量同步信号。接收端基于单变量单向耦合同步方法获得解密同步信号，实现信息信号高信噪比恢复。仿真结果表明了方案的有效性。

A hybrid secure communication method based on the synchronization of hyperchaos systems

Using the synchronization of hyperchaotic oscillators with only one variable unidirectionally coupled and the two-channel transmission method, a hybrid secure communication scheme with two channels based on the hyperchaos synchronization is proposed. In this scheme, one or several variables of the hyperchaotic oscillator at the transmitter are used to generate digital key and masking signal, the information signals are first encrypted by the key and then masked by the masking signal. The masked signals are transmitted in one channel ,the other channel is used to transmit the single variable which is coupled to the receiver to drive two hyperchaotic oscillators to synchronize.The information signals can be recoverd precisely with higher SNR at the receiver.Computer simulation is performed to verify the results.