计算机科学 ›› 2015, Vol. 42 ›› Issue (11): 208-211.doi: 10.11896/j.issn.1002-137X.2015.11.043
邱丰品,卫宏儒
QIU Feng-pin and WEI Hong-ru
摘要： 为研究分组密码CLEFIA-128抵抗不可能差分攻击的能力,基于一条9轮不可能差分路径,分析了13轮不带白化密钥的CLEFIA-128算法。利用轮函数中S盒差分分布表恢复部分密钥,利用轮密钥之间的关系减少密钥猜测量,并使用部分密钥分别猜测(Early Abort)技术有效地降低了复杂度。计算结果表明,该方法的数据复杂度和时间复杂度分别为O(2103.2)和O(2124.1)。
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