一类基于混沌函数的分组密码的安全性评估

张文涛; 卿斯汉; 吴文玲

引用本文:	张文涛,卿斯汉,吴文玲.一类基于混沌函数的分组密码的安全性评估.软件学报,2003,14(3):512-517

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一类基于混沌函数的分组密码的安全性评估
张文涛^1,2, 卿斯汉^1,2, 吴文玲^1,2
1.中国科学院信息安全技术工程研究中心,北京,100080;2.中国科学院软件研究所,北京,100080

摘要:

评估了一类基于混沌函数的分组密码(generalized Feistel structure,简称GFS)抵抗差分密码分析和线性密码分析的能力.如果轮函数是双射且它的最大差分特征概率和线性逼近概率分别是p和q,则r轮GFS的最大差分特征和线性逼近的概率分别以p^r-1和q^r-1为其上界.

关键词: 分组密码基于混沌函数的分组密码差分密码分析线性密码分析安全性评估

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基金项目:Supported by the National Natural Science Foundation of China under Grant Nos.60103023, 60083007 (国家自然科学基金); the National Grand Fundamental Research 973 Program of China under Grant No.G1999035810 (国家重点基础研究发展规划(973))

Security Evaluation for a Class of Block Ciphers Based on Chaotic Maps

ZHANG Wen-Tao,QING Si-Han,WU Wen-Ling

Abstract:

The security evaluation of a class of block ciphers based on chaotic maps against differential and linear attacks is studied. If the round function is bijective and its maximum differential and linear characteristic probabilities are p and q respectively, the upper bounds of maximum differential and linear characteristic probabilities for r rounds are p^r-1and q^r-1 respectively.

Key words: block cipher block cipher based on chaotic maps differential cryptanalysis linear cryptanalysis security evaluation