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arXiv 2004.09245math.NTcs.CR
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偶维Kasami函数的幂APN函数CC Z-等价

A power APN function CCZ-equivalent to Kasami function in even dimension

Augustine Musukwa, Massimiliano Sala

摘要:

令$n$为偶数,使得$n\equiv 0 \pmod{4}$。我们证明了在$\mathbb{F}_{2^n}$上的幂函数$x^d$,带有$d=2^{\frac{n+2}{2}}+2^{\frac{n-2}{2}}-1$,是度$n/2$的APN函数,它与度$n/2$和度$(n+4)/2$的Kasami函数CCZ等价.

英文摘要:

Let $n$ be an even number such that $n\equiv 0 \pmod{4}$. We show that a power function $x^d$, with $d=2^{\frac{n+2}{2}}+2^{\frac{n-2}{2}}-1$, on $\mathbb{F}_{2^n}$ is an APN function of degree $n/2$ which is CCZ-equivalent to Kasami functions of degrees $n/2$ and $(n+4)/2$.

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