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Paper 2010/573
On permutation polynomials EA-equivalent to the inverse function over $GF(2^n)$
Yongqiang Li and Mingsheng Wang
Abstract
It is proved that there does not exist a linearized polynomial $L(x)\in\mathbb{F}_{2^n}[x]$ such that $x^{-1}+L(x)$ is a permutation on $\mathbb{F}_{2^n}$ when $n\geq5$, which is proposed as a conjecture in \cite{li}. As a consequence, a permutation is EA-equivalent to the inverse function over $\mathbb{F}_{2^n}$ if and only if it is affine equivalent to it when $n\geq 5$.
Metadata
- Available format(s)
- Category
- Secret-key cryptography
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- Inverse functionEA-equivalencePermutation polynomialS-boxKloosterman sums
- Contact author(s)
- liyongqiang @ is iscas ac cn
- History
- 2010-11-10: received
- Short URL
- https://ia.cr/2010/573
- License
-
CC BY