置换偶次域的高度非线性微分4一致幂映射
A Highly Nonlinear Differentially 4 Uniform Power Mapping That Permutes Fields of Even Degree
摘要:
具有低微分一致性的函数具有良好的抗差分攻击能力,可以作为对称密码系统的S盒。AES(高级加密标准)使用称为反函数的差分4均匀函数。在对称密码系统中使用的任何函数都应该是一个置换。此外,要求函数是高度非线性的,以便它能抵抗松井的线性攻击。在这篇文章中,我们证明了Hans Dobbertin发现的一个高度非线性置换具有4的微分一致性,因此,相对于微分和线性密码分析,它和反函数一样适合用于对称密码系统。
英文摘要:
Functions with low differential uniformity can be used as the s-boxes of symmetric cryptosystems as they have good resistance to differential attacks. The AES (Advanced Encryption Standard) uses a differentially-4 uniform function called the inverse function. Any function used in a symmetric cryptosystem should be a permutation. Also, it is required that the function is highly nonlinear so that it is resistant to Matsui's linear attack. In this article we demonstrate that a highly nonlinear permutation discovered by Hans Dobbertin has differential uniformity of four and hence, with respect to differential and linear cryptanalysis, is just as suitable for use in a symmetric cryptosystem as the inverse function.
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