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对文献[1]中的一个方案作了改进。用混沌映射信号作保密通信系统的调制载波,对待加密传输的信息信号进行调制,不需要用其它混沌同步方法,利用模运算在接收端直接完成混沌载波的恢复,从而恢复信息信号;为了更好地隐匿信息信号特征,借鉴混沌掩盖对信息信号幅度进行限制,使密文完全随机化。仿真结果表明:该加密系统加密效果好,且能抵御密码分析。
One of the schemes in [1] has been improved. The chaotic mapping signal is used as the modulation carrier of the secure communication system to modulate the information signal to be encrypted and transmitted without using other chaotic synchronization methods and the modulo operation is used to directly recover the chaotic carrier at the receiving end to recover the information signal. Hiding the characteristics of information signals and using the chaos masking to limit the amplitude of information signals and completely randomizing the ciphertext. Simulation results show that the encryption system has good encryption effect and can resist the password analysis.