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arXiv 2102.02511cs.ITcs.IRmath.ITquant-ph
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基于弱自对偶星积码的高速率量子私有信息检索

High-Rate Quantum Private Information Retrieval with Weakly Self-Dual Star Product Codes

Matteo Allaix, Lukas Holzbaur, Tefjol Pllaha, Camilla Hollanti

摘要:

在经典的私有信息检索(PIR)设置中,用户想要从数据库或分布式存储系统(DSS)中检索文件,而不向保存数据的服务器泄露文件身份。在量子PIR(QPIR)设置中,用户通过从服务器接收量子信息来私下检索经典文件。Song等人已经在复制服务器的情况下处理了QPIR问题,包括有和没有共谋。最近Allaix等人考虑了$[n,k]$最大距离可分离(MDS)编码服务器上的QPIR,但是在较小的$t$不会提高检索速率的意义上,共谋基本上被限制到$t=n-k$服务器。在本文中,QPIR设置进行了扩展,以允许检索与高速率为任何数量的串通服务器$t$与$1 \leq t \leq n-k$。类似于以前的情况下,实现的速率优于那些已知的或在经典的同行,以及那些以前提出的编码和共谋QPIR计划。这是通过考虑稳定器形式主义和弱自对偶广义里德-所罗门(GRS)星积码。

英文摘要:

In the classical private information retrieval (PIR) setup, a user wants to retrieve a file from a database or a distributed storage system (DSS) without revealing the file identity to the servers holding the data. In the quantum PIR (QPIR) setting, a user privately retrieves a classical file by receiving quantum information from the servers. The QPIR problem has been treated by Song et al. in the case of replicated servers, both with and without collusion. QPIR over $[n,k]$ maximum distance separable (MDS) coded servers was recently considered by Allaix et al., but the collusion was essentially restricted to $t=n-k$ servers in the sense that a smaller $t$ would not improve the retrieval rate. In this paper, the QPIR setting is extended to allow for retrieval with high rate for any number of colluding servers $t$ with $1 \leq t \leq n-k$. Similarly to the previous cases, the rates achieved are better than those known or conjectured in the classical counterparts, as well as those of the previously proposed coded and colluding QPIR schemes. This is enabled by considering the stabilizer formalism and weakly self-dual generalized Reed--Solomon (GRS) star product codes.

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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