交叉耦合帐篷映像格子模型的改进及性能分析  

The Improved Cross Coupled Tent Map Lattices and its Characteristics Analysis

作　　者：赵晨[1,2] 刘建东[1] 王业铨[1,2] 

机构地区：[1]北京石油化工学院信息工程学院,北京102617 [2]北京化工大学信息科学与技术学院,北京100029

出　　处：《北京石油化工学院学报》2013年第4期56-61,共6页Journal of Beijing Institute of Petrochemical Technology

摘　　要：在分析交叉耦合帐篷映像格子模型的反应扩散机制及密码学特性存在缺陷的基础上,提出了一种改进的方案。方案改进后,减少了系统的控制变量,在结构上通过时空双向交叉耦合,提高了系统扩散和混淆的速率,格点状态能够快速具有各态历经性,可以快速生成具有均匀分布特性的多维伪随机序列。在参数安全性上,系统的最大Lyapunov指数稳定地趋向大的正值,序列的差值特性具有较理想的概率分布。改进的交叉耦合帐篷映像格子模型在构造序列密码方面极具应用价值。By analyzing the reaction mechanism and defects in cryptography application of cross coupled tent map lattices（CCML）, the paper proposes an improved cross coupled map lattices （1CCML）. The improved model reduces the control variables and uses the structure of cross couplings through time and space. ICCML system increases the rate of diffusion and confusion and generates pseudo-random sequence with uniform distribution. Meanwhile the lattice state reaches ergodic state quickly. As for the security of parameters, the largest Lyapunov exponent tends to be large positive values stably, while the difference degree has an ideal distribution. All of the properties suggest that ICCML has great application values in stream ciphers.

关 键 词：交叉耦合帐篷映像格子 序列密码 时空混沌 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]