减轮SPECK算法的不可能差分分析

徐洪; 苏鹏晖; 戚文峰

doi:10.11999/JEIT170049

减轮SPECK算法的不可能差分分析

doi: 10.11999/JEIT170049

基金项目:

国家自然科学基金(61100200, 61309017, 61472251, 61502524, 61521003)

计量
- 文章访问数: 1799
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- PDF下载量: 376
- 被引次数: 0
出版历程
- 收稿日期: 2017-01-16
- 修回日期: 2017-05-15
- 刊出日期: 2017-10-19

Impossible Differential Cryptanalysis of Reduced-round SPECK

Funds:

The National Natural Science Foundation of China (61100200, 61309017, 61472251, 61502524, 61521003)

摘要

摘要: SPECK系列算法是2013年由美国国家安全局提出的轻量分组密码算法。算法整体为变形的Feistel结构，轮函数为模整数加法、循环移位和异或的组合，即所谓的ARX模块。在不可能差分研究方面，目前仅有LEE等人给出了SPECK 64算法的一些6轮不可能差分特征。该文进一步找到了SPECK 32/64算法和SPECK 48/96算法的一些6轮不可能差分特征，并在其前面添加1轮后面添加3轮，给出了对两个算法的10轮不可能差分分析。
- 轻量分组密码算法 /
- SPECK算法 /
- 不可能差分分析 /
- 不可能差分特征
Abstract: SPECK is a family of lightweight block ciphers proposed in 2013 by researches from National Security Agency (NSA) of USA. The algorithm adopts a modified Feistel construction that applies a combination of addition, rotation and XORing (the so-called ARX structure). Up to now, nothing is done on the impossible differential cryptanalysis of the SPECK family except that some 6-round impossible differential characteristics are found by LEE et al. In this article, some 6-round impossible differential characteristics of SPECK 32/64 and SPECK 48/96 are found and a 10-round impossible differential cryptanalysis on these two ciphers is presented by adding one round forward and three rounds backward.
- Lightweight block ciphers /
- SPECK cipher /
- Impossible differential cryptanalysis /
- Impossible differential characteristic

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参考文献(16)

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