Proving the Security of Mediated Semi-Quantum Key Distribution Using Entropic Uncertainty Relation

IF 4.4 Q1 OPTICS
Zhen-Ye Du, You-Long Yang, Tong Ning, Kai-Tian Gao
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Abstract

In recent years, mediated semi-quantum key distribution (MSQKD) has become a hot topic in quantum cryptography. In this study, the original MSQKD protocol is revisited and a new scheme for proving security based on information theory is developed. At first, a new bound on the key rate of the protocol is derived using an entropic uncertainty relation, thus proving the unconditional security of the protocol. In addition, in the asymptotic scenario, a higher noise tolerance that improves the previous results is found. The legitimate communicating parties have to abort the protocol when they observe the error rate is larger than the noise tolerance. Furthermore, the security of a single-state MSQKD protocol and a single-state semi-quantum key distribution (SQKD) protocol is proven using a similar scheme.

Abstract Image

利用熵不确定性关系证明中介半量子密钥分发的安全性
近年来,中介半量子密钥分发(MSQKD)已成为量子密码学的热门话题。本研究重新审视了原始的 MSQKD 协议,并基于信息论开发了一种证明安全性的新方案。首先,利用熵不确定性关系推导出了协议密钥率的新约束,从而证明了协议的无条件安全性。此外,在渐进情况下,还发现了更高的噪声容忍度,从而改进了之前的结果。当合法通信方观察到错误率大于噪声容限时,他们必须中止协议。此外,还利用类似方案证明了单态 MSQKD 协议和单态半量子密钥分发(SQKD)协议的安全性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
7.90
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