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应用科学学报 ›› 2006, Vol. 24 ›› Issue (5): 485-490.

• 论文 • 上一篇    下一篇

变种Camellia对Square攻击的安全性

李清玲1, 李超1,2   

  1. 1. 国防科技大学数学与系统科学系, 湖南长沙 410073;
    2. 东南大学移动通信国家重点实验室, 江苏南京 210096
  • 收稿日期:2005-04-09 修回日期:2005-07-05 出版日期:2006-09-30 发布日期:2006-09-30
  • 通信作者: 李超,教授,博导,研究方向:编码密码理论与应用,E-mail:lichao_hudt@sina.com E-mail:lichao_hudt@sina.com
  • 基金资助:
    国家自然科学基金(60573028);东南大学移动通信国家重点实验室开放基金(A200503)资助项目

Safety of Variant Camellia against Square Attack

LI Qing-ling1, LI Chao1,2   

  1. 1. Department of Mathematics and System Science, National University of Defense Technology, Changsha 410073, China;
    2. National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
  • Received:2005-04-09 Revised:2005-07-05 Online:2006-09-30 Published:2006-09-30

PDF

81

被引次数

9

摘要： 讨论了Camellia1对Square攻击的安全性,并就FL/FL-1函数对Camellia与Camellia1抗Square攻击能力的影响进行了分析.结果表明Camellia1对Square攻击的安全性远大于Camellia,FL/FL-1函数中的比特循环移位运算对Camellia及Camellia1抗Square攻击的能力并无明显影响,而算法中的不规则层FL/FL-1函数显著影响了Camellia及Camellia1对Square攻击的安全性

关键词: Camellia算法, Square攻击, 分组密码

Abstract: By changing round functions of Camellia into round function with an S-P-S structure, a variant Camellia is obtained, denoted Camellia1.This paper discusses safety of Camellia against square attack and analyzes the influence of FL/FL-1 functions on the safety of Camellia and Camellia1 against square attacks.The results show that Camellia1 is safer than Camellia.The bit-rotation of FL/ FL-1 functions does not noticeably affect the safety of Camellia and Camellia1, while the layer of FL/FL-1 functions clearly affects the safety.

Key words: Square attack, Camellia algorithm, block cipher

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