摘要
从混沌同步对参数失配敏感性的特点出发 ,探讨了基于自然混沌系统同步分解的混沌保密通信系统的保密性能 ,指出基于低维混沌系统的通信系统不具有高保密性 ,容易受自适应同步控制的攻击 .针对这一缺陷 ,对一类基于离散时间混沌噪声发生器的混沌加密方法进行了研究 ,其加密器与解密器之间对参数匹配误差敏感性的特点能防止自适应同步控制的攻击 ,且实现简单 ,加密性能易于控制 。
The measure of security of chaotic secure communication schemes based on the active-passive decomposition of natural chaotic systems was discussed in the contents of its characteristics of sensitivity to parameter mismatches. The result shows that the chaotic secure communication schemes based on the decomposition of low dimensional chaotic systems are not secure enough to resist the attack of adaptive synchronization. A class of chaotic secure communication schemes based on the chaotic noise generator, which can eliminate such defects, was studied. The scheme is found to have characteristics that can make adaptive synchronization attack invalid. The proposed scheme is easy to implement by circuits, and its level of security can be easily adjusted. These properties make it superior to the schemes based on the active-passive decomposition of low dimensional chaotic systems.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2001年第1期133-138,共6页
Journal of Shanghai Jiaotong University
关键词
保密通信
自适应混沌同步控制
混沌噪声发生器
混沌加密系统
保密性能
参数敏感性
Adaptive control systems
Chaos theory
Communication systems
Discrete time control systems
Mathematical techniques
Noise generators
Security of data
Sensitivity analysis
Synchronization