【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AES₁28.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.更多还原

【Abstract】 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 2-22has been derived.Based on this path,a novel method was proposed for impossible differential cryptanalysis of 8-round AES-128.The analysis method requires 287pairs of chosen plaintexts,about 299words of memory and 296encryption / decryption computations.According to the analysis process,it is found that the confusing level of the MixColumns transformation in AES algorithm is insufficient,which provides a theoretical basis to improve the AES security.更多还原