基于贝尔态的轻量级有第三方不诚实的半量子密钥分发协议。

Lightweight mediated semi-quantum key distribution protocol with a dishonest third party based on Bell states.

机构信息

Department of Computer Science and Information Engineering, National Taitung University, No. 369, Sec. 2, University Rd., Taitung, 95092, Taiwan.

Center for General Education, China Medical University, No. 100, Sec. 1, Jingmao Rd., Beitun Dist., Taichung, 406040, Taiwan.

出版信息

Sci Rep. 2021 Dec 1;11(1):23222. doi: 10.1038/s41598-021-02614-3.

DOI:10.1038/s41598-021-02614-3

PMID:34853361

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8636616/

Abstract

The mediated semi-quantum key distribution (MSQKD) protocol is an important research issue that lets two classical participants share secret keys securely between each other with the help of a third party (TP). However, in the existing MSQKD protocols, there are two improvable issues, namely (1) the classical participants must be equipped with expensive detectors to avoid Trojan horse attacks and (2) the trustworthiness level of TP must be honest. To the best of our knowledge, none of the existing MSQKD protocols can resolve both these issues. Therefore, this study takes Bell states as the quantum resource to propose a MSQKD protocol, in which the classical participants do not need a Trojan horse detector and the TP is dishonest. Furthermore, the proposed protocol is shown to be secure against well-known attacks and the classical participants only need two quantum capabilities. Therefore, in comparison to the existing MSQKD protocols, the proposed protocol is better practical.

摘要

中介半量子密钥分发（MSQKD）协议是一个重要的研究课题，它允许两个经典参与者在第三方（TP）的帮助下安全地共享秘密密钥。然而，在现有的 MSQKD 协议中，存在两个可以改进的问题，即（1）经典参与者必须配备昂贵的探测器，以避免木马攻击，（2）TP 的可信度水平必须是诚实的。据我们所知，现有的 MSQKD 协议都无法解决这两个问题。因此，本研究以贝尔态为量子资源，提出了一种 MSQKD 协议，其中经典参与者不需要木马探测器，TP 不诚实。此外，所提出的协议被证明可以抵御已知的攻击，经典参与者只需要两种量子能力。因此，与现有的 MSQKD 协议相比，所提出的协议具有更好的实用性。