一类新型混沌反馈密码序列的理论设计  

The Theoretical Design for a Class of New Chaotic Feedback Stream Ciphers

作　　者：桑涛[1] 王汝笠[1] 严义埙[1] 

机构地区：[1]中国科学院上海技术物理研究所光电子研究中心

出　　处：《电子学报》1999年第7期47-50,共4页Acta Electronica Sinica

摘　　要：本文提出一种新型混沌映射，“逐段二次方根”映射，用于反馈密码序列的设计，该映射可产生具有均匀分布函数和δｌｉｋｅ自相关函数的模拟混沌序列，它们经过一类特殊变换的量化后可生成具有安全统计性质的０１序列．与周红等人提出的映射相比，该新映射提供了更强的安全性，这是因为它在保留了原有的优良统计性质的基础上解决了“逐段线性”的缺陷并扩大了密钥空间．This paper proposes a class of new mappings called piecewisesquareroot mappings to design feedback stream ciphers.Such mappings can generate chaotic analogue signals that have uniform distribution function,like autocorrelation function,and can be further quantized into 01 sequence with secure statistical properties by a class of special transofrmation.Compared with Zhou & Lings piecewiselinear mappings,piecewisesquareroot mappings provide enhanced security in that they can maintain the original perfect statistical properties,as well as overcome the defect of piecewiselinearity and expand the key space.

关 键 词：密码 混沌 序列密码 M序列 线性复杂度 

分 类 号：TN918.2[电子电信—通信与信息系统]