摘要
3D密码是在CANS2008上提出的一个新的分组密码算法,与以往的分组密码算法不同,它采用了3维结构。密码设计者给出了3D密码的一个5轮不可能差分并对6轮3D密码进行了不可能差分攻击。该文通过3D密码的结构特性找到了新的6轮不可能差分。基于新的不可能差分和3D密码的等价结构,可以对7轮和8轮3D密码进行有效的不可能差分攻击。此外,结合其密钥扩展规则,可以将攻击轮数提高至9轮。该文的攻击结果优于密码设计者的结果。
3D cipher is a new block cipher proposed in CANS2008.It is different from all known block cipher as it uses the three dimension structure.The designers give out a 5-round impossible differential and make an impossible differential attack on 6-round 3D cipher.In this paper,some new 6-round impossible differentials are found according to its structure properties.Based on these new impossible differentials and the equivalent structure of 3D cipher,effective impossible differential attacks can be made on 7 and 8-round 3D cipher.Moreover,according to some properties of the key schedule,these attacks can be extended to 9-round 3D cipher.These attack results are better than the designer's.
出处
《电子与信息学报》
EI
CSCD
北大核心
2010年第10期2516-2520,共5页
Journal of Electronics & Information Technology
基金
国家自然科学基金(60803156)
信息安全国家重点实验室开放基金(01-07)资助课题
关键词
分组密码
3D密码
不可能差分攻击
Block cipher
3D cipher
Impossible differential attack