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arXiv 2008.00663cs.ITmath.IT
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椭圆多项式的近MDS码

Near MDS codes from oval polynomials

Qiuyan Wang, Ziling Heng

摘要:

具有$[n, k, n-k+1]$形式的参数的线性码被称为MDS(最大距离可分离)码。具有$[n, k, n-k]$形式的参数的线性码被称为几乎是MDS(即,几乎最大距离可分离)或简称为AMDS。如果一个码和它的对偶码都是几乎最大距离可分的,则称这个码是接近最大距离可分的(简称接近MDS或NMDS)。近MDS码对应于有限几何中有趣的对象,在组合数学和密码学中有很好的应用。利用奇$m$的特殊椭圆多项式构造了$\gf(2^m)$上的7个$[2^m+1, 3, 2^m-2]$ near MDS码无限族和$\gf(2^m)$上的7个$[2^m+2, 3, 2^m-1]$ near MDS码无限族.此外,利用椭圆多项式构造了$\gf(2^m)$上9个接近MDS码的最优$[2^m+3, 3, 2^m]$无限族.

英文摘要:

A linear code with parameters of the form $[n, k, n-k+1]$ is referred to as an MDS (maximum distance separable) code. A linear code with parameters of the form $[n, k, n-k]$ is said to be almost MDS (i.e., almost maximum distance separable) or AMDS for short. A code is said to be near maximum distance separable (in short, near MDS or NMDS) if both the code and its dual are almost maximum distance separable. Near MDS codes correspond to interesting objects in finite geometry and have nice applications in combinatorics and cryptography. In this paper, seven infinite families of $[2^m+1, 3, 2^m-2]$ near MDS codes over $\gf(2^m)$ and seven infinite families of $[2^m+2, 3, 2^m-1]$ near MDS codes over $\gf(2^m)$ are constructed with special oval polynomials for odd $m$. In addition, nine infinite families of optimal $[2^m+3, 3, 2^m]$ near MDS codes over $\gf(2^m)$ are constructed with oval polynomials in general.

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