一个混沌保密通信方案的改进  

Improvement of a Chaos -based Secure Communication Scheme

作　　者：吴敏[1] 丘水生[1] 

机构地区：[1]华南理工大学电信学院,广州510640

出　　处：《通信技术》2003年第1期103-105,共3页Communications Technology

基　　金：教育部博士学科点基金(00056107);广东省自然科学基金(990585)项目资助

摘　　要：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。This paper is an improvement on a scheme in the literature.The modulation is realized by adding the information signal to the chaotic mapping sequence.In the receiver,the chaotic carrier is re-trieved from the received signal by u sing a mod operation,and then the inf ormation signal is recovered.The method of chaotic masking is used in o rder to hide the characters of the inf ormation signal and randomize the cryptograph.The computer experiments show that the chaotic encrypt ing system is fine in security and can resist the decipher analysis.

关 键 词：混沌映射 混沌掩盖 加密 解密 

分 类 号：TN918[电子电信—通信与信息系统]