一种新的基于相位编码的B92协议

量子电子学报 ›› 2019, Vol. 36 ›› Issue (6): 727-731.

一种新的基于相位编码的B92协议

高菲菲,李志慧,韩朵

陕西师范大学数学与信息科学学院，陕西西安 710119

收稿日期:2019-03-18 修回日期:2019-08-29 出版日期:2019-11-28 发布日期:2019-11-19
通讯作者: 李志慧(1966-)，女，陕西眉县人，博士，教授，博士生导师，主要从事有限域和密码学方面 E-mail:lizhihui@snnu.edu.cn
作者简介:高菲菲（1993-），女，内蒙古乌兰察布人，研究生，主要从事有限域和密码学方面的研究。E-mail：792099462@qq.com
基金资助:
国家自然科学基金资助项目;中央高校基本科研业务费专项资金资助

A new phase encoding based B92 protocol

College of Mathematics and Information Science, Shaanxi Normal University, Xi’an 710119, China

Received:2019-03-18 Revised:2019-08-29 Published:2019-11-28 Online:2019-11-19
Supported by:
Supported by National Natural Science Foundation of China (国家自然科学基金资助项目,61602291,11671244),The Fundamental Research Funds for the Central Universities (中央高校基本科研业务费专项资金资助, GK201603087)

摘要/Abstract

摘要： 量子密钥分发允许两个远程方生成理论上安全的密钥，但实际中往往存在光源和测量设备的非完美性，使得量子密钥分配系统存在不同的攻击。为了消除这些攻击，研究者提出了一种双场量子秘钥分发协议。该协议将密钥信息编码在光子的相位中使得光子易于传输和保持，不仅可以将传输距离延长，并且解决了测量装置的安全性问题。受此启发，在此协议的基础上提出了一种基于相位编码的B92协议，所提出协议消除了探测器的攻击，密钥率相比原B92协议也有所提高，在后处理过程中不需要对基步骤，通信双方使用的只有两个非正交量子态，并且在实际中易于实现。

关键词: 量子光学, TF-B92协议, TF-QKD协议, 诱骗态

Abstract: Quantum key distribution allows two remote parties to generate a theoretically secure key. However, in practice, the imperfections of the light source and measuring device often exist, which causes different attacks on the quantum key distribution system. To eliminate these attacks, the researchers proposed a twin field quantum key distribution protocol. The protocol encodes the key information in the phase of the photons so that the photons are easily transmitted and maintained, which not only extends the transmission distance, but also solves the safety problem of the measuring device. Inspired by this, a new B92 protocol based on phase encoding is proposed. Compared with the original B92 protocol, the new protocol not only eliminates the attack of the detector, but also imporves the key rate. There is no need for a base step in the post-processing process in this new protocol, and only two non-orthogonal quantum states are used by both communicating parties, and moreover, it is easy to implement in practice.

Key words: quantum optics, TF-B92 protocol, TF-QKD protocol, decoy state

高菲菲李志慧韩朵. 一种新的基于相位编码的B92协议[J]. 量子电子学报, 2019, 36(6): 727-731.

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