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| 截断差分-线性密码分析 |
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贺也平1,2,3, 吴文玲1,2,3, 卿斯汉1,2
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1.中国科学院软件研究所信息安全国家重点 实验室,北京,100080;2.中国科学院信息安全技术工程研究中心,北京,100080;3.中国科学院软件研究所计算机科学开放研究实验室,北京,100080
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| 摘要: |
| 对差分-线性密码分析方法进行推广,提出了截断差分-线性密码分析方法.对9-轮和11- 轮DES(data encryption standard)密码算法的分析表明,该方法具有更加方便、灵活,适用 范围更广的特点.同时，利用截断差分-线性密码分析方法得出,在类似DES结构的算法中,S -盒的摆放顺序对密码的强度有较大的影响.由此，截断差分-线性分析方法给出了优化S- 盒排序的一种参考判别准则. |
| 关键词: DES(data encryption standard),密码,S-盒, 差分分析,线性分析,截断差分. |
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| 基金项目:本文研究得到国家重点基础研究发展规划项目(Nos.G1999035802,G1999035810)资助. |
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| Truncated Differential-Linear Cryptanalysis |
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HE Ye-ping,WU Wen-ling,QING Si-han
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| Abstract: |
| A truncated differential-linear cryptanalysis method is proposed, which extends differential-linear method. DES (data encryption standard) algorithms of 9-ro und and 11-round were analyzed. The method was proved more convenient and widel y applicable. In DES like cipher algorithms, the fact that the order in which S -boxes were placed would affect the security of cipher was shown by the method. In this way, the truncated differential-linear method gives a criterion for or dering S-boxes optimally. |
| Key words: DES (data encryption standard), cipher, S-box, differential analysis, linear a nalysis, truncated differential. |
