AES的S-盒中仿射变换的性质

Property of Affine Transformation in S-box of AES

美国新一代数据加密标准 AES的 S-盒由有限域 GF( 2 8)中的一个“倒数变换”和环 Z2 [x]/( x8+ 1 )中的“仿射变换”复合而成 ,它们的性质在本质上反映了 AES的安全性。而“倒数变换”和“仿射变换”的分布性质是 S-盒分布性质的基础。研究了仿射变换的迭代性质 ,结果表明 。

The S box of AES of the American new data encrypt standard is the composite of a reciprocal transformation in GF (2 8)and a affine transformation in Z 2/(x 8+1),whose properties essentially reflect the securities of AES.The distribution properties of reciprocal transformation and affine transformation are the foundation distribution property of S box in AES.In this paper the iterative property of the affine transformation is investisated, with the result that the affine transformation in AES has bad iterative property.