计算机科学 ›› 2014, Vol. 41 ›› Issue (8): 197-201.doi: 10.11896/j.issn.1002-137X.2014.08.043
胡志华,覃中平,张青
HU Zhi-hua,QIN Zhong-ping and ZHANG Qing
摘要： 通过分析高级加密标准(AES)的4轮内部加密特征,推导出一个新的4轮差分路径,该路径存在的可能性为2－30,在该性质的基础上利用不可能差分分析方法,分析了9轮AES_256。该分析方法需要295对明文、约2163个存储单元和约2193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,这为提升和改进AES安全性提供了理论依据。
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