一种混沌语音保密通信系统  

A Chaotic Speech Secure Communication System

作　　者：浦晨岚[1] 林锦国[1] 李为相[1] 

机构地区：[1]南京工业大学自动化学院系统工程研究所,江苏南京210009

出　　处：《计算机仿真》2007年第2期84-87,148,共5页Computer Simulation

基　　金：省教育厅自然科学研究项目(02KJB630001)

摘　　要：随着现代计算机技术和网络技术的发展,IP电话已越来越广泛应用于人们的日常生活中,由此带来的语音信息的保密传输的要求也越来越迫切,传统的加密算法已经倍感压力。混沌是指在确定的非线性系统中出现的一种非常复杂的随机现象。近年来混沌同步及其在保密通信中的应用受到了广泛的关注,已成为混沌应用领域中的热点。针对无刷式直流电机(BLDCM)这一混沌模型,用状态观测器方法实现了发送端和接收端的混沌同步,同时构建了两种基于该混沌模型的混沌同步保密通信系统,在这两种系统中成功实现了语音信号的安全通信,通过语音信号传输过程的动态模拟实验验证了这两种语音保密通信系统的有效性。The development of computer technology and network technique has brought Internet Phony to extensive use in people＇ s daily life. The consequent demand on speech signals＇ secure transmission has become more and more urgent. Chaos is a kind of complicated and random phenomenon that is determined wholly by deterministic nonlinear system. Recently, chaotic synchronization and its application to secure communications attract wide interest and have become hotspot in the field of chaos application. In the article, based on brushless DC motor（BLDCM） chaotic model, the state observer is used to achieve the synchronization between sending end and receiving end. Besides, the two chaotic secure communication systems based on the chaotic model are established, in the systems, speech signals have successfully achieved secure communication. By the dynamic simulated experiments of speech signals＇ transmission, the speech secure communication systems＇ validity is proved.

关 键 词：语音保密通信 混沌同步 状态观测器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]