摘要
通过分析高级加密标准AES的三轮加密内部特征,推导出一个新的3轮差分路径,该路径存在的可能性为2-22,在该性质的基础上利用不可能差分分析方法,分析了8轮AES_128.该分析方法需要287对明文、约299个存储单元和约296加解密运算.通过该分析可以看出AES算法的行列变换的混淆程度不够,这为我们提升和改进AES安全性提供理论依据.
Through profound study of the 3-round encryption characteristics of advanced encryption standard （ AES }, a new 3-round differential path with an existing probability to of 2.22 has been derived. Based on this path, a novel method was proposed for impossi- ble differential cryptanalysis of 8-round AES-128. The analysis method requires 287 pairs of chosen plaintexts, about 299 words of memory and 296 encryption/decryption computations. According to the analysis process, it is found that the confusing level of the MixCohirrms transformation in AES algorithm is insufficient, which provides a theoretical basis to improve the AES security.
出处
《小型微型计算机系统》
CSCD
北大核心
2013年第9期2111-2115,共5页
Journal of Chinese Computer Systems
基金
湖北省自然科学基金项目(2012FFC034)资助
湖北省教育厅优秀中青年人才项目(D20132903)资助
关键词
AES_128
不可能差分分析
差分特征
AES-128
impossible differential cryptanalysis
differential character
