摘要
研究13轮CLEFIA-128算法,在9轮不可能差分攻击的基础上,提出一种未使用白化密钥的不可能差分密码分析方法。猜测每个密钥,筛选满足轮函数中S盒输入输出差分对的数据对。利用轮密钥之间的关系减少密钥猜测量,并使用Early Abort技术降低计算复杂度。计算结果表明,该方法的数据复杂度和时间复杂度分别为2120和2125.5。
This paper presents an impossible differential cryptanalysis of 13-round CLEFIA-128 no whitening key, which use the 9-round impossible differential. In the process of cryptanalysis, it guesses each key and filler the data pairs using the output and input differences of S-box. It utilizes the keys relations to reduce the number of guessed keys, and introduces the early abort technique to reduce the time complexity. Computing result shows that the complexity of the cryptanalysis is about 2 120 data and 2 1255 encryptions
出处
《计算机工程》
CAS
CSCD
2012年第3期141-144,共4页
Computer Engineering
基金
国家自然科学基金资助项目(61070250)
北京市自然科学基金资助项目(4102055)
