分组密码Midori128的多维零相关线性分析  

Multidimensional Zero-Correlation Linear Cryptanalysis on Midori128

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作  者:程璐 魏悦川[2] 牛向洲 CHENG Lu;WEI Yuechuan;NIU Xiangzhou(Postgraduate Brigade;Department of Electronic Technology, Engineering University of PAP, Xi'an 710086, China)

机构地区:[1]武警工程大学研究生管理大队,西安710086 [2]武警工程大学电子技术系,西安710086

出  处:《武警工程大学学报》2017年第6期51-55,共5页Journal of Engineering University of the Chinese People's Armed Police Force

摘  要:为了评估轻量级分组密码算法Midori128的安全性,对Midori128算法进行了多维零相关线性分析。首先利用“中间相错”的方法构造了Midori128的6轮零相关线性逼近,然后基于所构造的6轮零相关线性逼近,对10轮Midori128进行了密钥恢复攻击。该攻击过程的数据复杂度约为2地。∞个明密文对,计算复杂度为2^120.68次10轮加密运算。结果表明,缩减至10轮的Midori128算法对于零相关线性分析方法是不免疫的。In order to evaluate the security of the light-weight block cipher Midori128,we carry on a multidimensional zero correlation linear cryptanalysis on the Midori128 algorithm has carried on. By using the "miss-in-the-middle" technique, we construct 6-round zero-correlation linear approximations. Based on the 6-round distinguisher, key-recovery attack on 10- round Midori128 is performed. The data complexity is 2^123.02 plaintexts and the time complexity is 2^120.68 10-round encryptions. The testing result shows that the Midori128 reduced to 10-round is not immune to multidimensional zero-correlation linear analysis.

关 键 词:分组密码 零相关线性分析 Midori密码 线性逼近 

分 类 号:TN918[电子电信—通信与信息系统]

 

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