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arXiv 2102.02831cs.ITmath.IT
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(交织)广义Goppa码的译码

Decoding of (Interleaved) Generalized Goppa Codes

Hedongliang Liu, Sabine Pircher, Alexander Zeh, Antonia Wachter-Zeh

摘要:

广义Goppa码由多项式的码定位符集$\mathcal{L}$和Goppa多项式$G(x)$定义。当$\mathcal{L}$中所有码定位多项式的次数均为1时,广义Goppa码是经典Goppa码.本文研究了二元广义Goppa码。首先,这些代码的奇偶校验矩阵与代码定位器的任何程度的推导。仔细选择的代码定位器导致广义Goppa码的最小汉明距离的下限,这提高了以前已知的界限。本文提出了一种二次译码算法,它能使译码误差达到最小距离的一半。介绍了交织广义Goppa码,提出了一种联合译码算法,该算法能以较高的概率译码超过最小距离一半的错误。最后,一些代码参数,以及它们如何适用于经典的McEliece后量子密码系统。

英文摘要:

Generalized Goppa codes are defined by a code locator set $\mathcal{L}$ of polynomials and a Goppa polynomial $G(x)$. When the degree of all code locator polynomials in $\mathcal{L}$ is one, generalized Goppa codes are classical Goppa codes. In this work, binary generalized Goppa codes are investigated. First, a parity-check matrix for these codes with code locators of any degree is derived. A careful selection of the code locators leads to a lower bound on the minimum Hamming distance of generalized Goppa codes which improves upon previously known bounds. A quadratic-time decoding algorithm is presented which can decode errors up to half of the minimum distance. Interleaved generalized Goppa codes are introduced and a joint decoding algorithm is presented which can decode errors beyond half the minimum distance with high probability. Finally, some code parameters and how they apply to the Classic McEliece post-quantum cryptosystem are shown.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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