摘要
在建立的离散混沌系统广义同步定理的基础上构造了一个广义混沌同步的离散系统,并结合Henon混沌映射设计了一个数字图像加密方案,能够对灰度图像成功加密并且实现了无失真解密.对该加密方案的密钥空间、密钥参数敏感性分析表明,该加密方案具有较高的安全性.数值仿真实验证明:该加密方案对混沌系统的参数及初始条件扰动极为敏感,任何大于10-15的扰动将使解密失效;该加密方案具有1076的密钥空间,能够有效地应用于网络通讯.
A constructive theorem of generalized synchronization for discrete chaos systems is established. Based on the theorem, a generalized chaotic synchronization discrete system was constructed. Combining this system with the Henon chaotic mapping designs a digital image encryption scheme, which can successfully encrypt and decrypt gray-scale images without any lost. The scheme is sensitive to perturbations of the parameters and initial conditions of the chaos system. Any perturbations which are larger than 10 - 15 will make corresponding decryptions become impossible. The key space of the scheme is as large as 10^76. The analysis of key space and key parameter sensitivity shows that the scheme has sound security. Numerical simulations reveal that the scheme is effective in network communication.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2007年第1期96-101,共6页
Journal of University of Science and Technology Beijing
基金
国家自然科学基金资助项目(No.70271068
60674095)
北京电子科技学院信息安全与保密重点实验室开放基金资助项目(No.KYKF200605)
关键词
图像加密
广义同步
HENON映射
网络通讯
image encryption
generalized synchronization
Henon mapping
network secure communication
