中文摘要：

重点综述了近年来混沌键控数字保密通信系统技术的主要进展,包括理论、设计思想、目前的研究热点、可能实现的又有一定实用价值的几种保密通信方案,同时提出了一种新型的CD-DCSK（相关延迟-差分混沌键控）保密通信系统,其性能要优于传统的键控方法。对今后混沌键控保密通信技术的问题作了概括,对混沌系统中的同步与传输技术以及混沌通信实用化需解决的若干问题进行了讨论,并展望了混沌键控保密通信的发展趋势。

英文摘要：

The main progresses in chaos shift keying digital secret communication system technology in recent years are introduced,including theory,design idea,research hotspots now,several secret communication schemes that maybe is realized and is value in practice.It presents a new CD-DCSK（correlation delay-differential chaos shift keying） secret communication system of which performances are superior to traditional shift keying methods.The questions of chaos shift secret communication technology in future are summarized,discussing Synchronization and transmission technology in chaos system as well as some questions to be solved in practice,forecasting development tendency for chaos shift keying secret communication.