Wu-Cai-Wu-Zhang量子私密比较协议的密码分析与改进
Cryptanalysis and improvement of Wu-Cai-Wu-Zhang's quantum private comparison protocol
AI总结：
本研究针对Wu-Cai-Wu-Zhang提出的量子私密比较协议开展密码分析，发现其部分场景下安全性弱于原有协议，进而提出无需纠缠、无需量子存储器且信息泄露更少的改进方案，兼顾安全性与可行性。
摘要：
在近期一篇论文（《International Journal of Quantum Information》17卷(2019)1950026页）中，作者讨论了我们此前提出的一种量子私密比较协议（《International Journal of Quantum Information》15卷(2017)1750014页）的安全缺陷，还提出了一个旨在规避这些问题的新协议。本文分析了他们协议中的信息泄露情况，发现在某些情况下其安全性甚至低于我们的协议。我们进一步提出了一种改进版本，具备以下优势：(1)无需纠缠，(2)不再需要量子存储器，(3)信息泄露更少。因此该改进方案同时实现了更优的安全性与更高的可行性。
英文摘要：
In a recent paper (Int. J. Quantum Inf. 17 (2019) 1950026), the authors discussed the shortcomings in the security of a quantum private comparison protocol that we previously proposed (Int. J. Quantum Inf. 15 (2017) 1750014). They also proposed a new protocol aimed to avoid these problems. Here we analysis the information leaked in their protocol, and find that it is even less secure than our protocol in certain cases. We further propose an improved version which has the following advantages: (1) no entanglement needed, (2) quantum memory is no longer required, and (3) less information leaked. Therefore, better security and great feasibility are both achieved.
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。
