基于Bell态分发的探测设备无关量子秘密共享  

Detector-device-independent quantum secret sharing based on Bell-state distribution

作　　者：刘天琦 李涛[1] LIU TianQi;LI Tao(MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing,School of Science,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学物理学院,半导体微纳结构与量子信息感知工业和信息化部重点实验室,南京210094

出　　处：《中国科学：物理学、力学、天文学》2024年第4期94-102,共9页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(编号:11904171);中央高校基本科研业务费专项(编号:30922010807)资助项目。

摘　　要：存在缺陷的探测装置可能会导致窃听者获取关键信息或注入恶意信息等安全问题.针对该问题,本文基于单光子Bell态测量和双光子Bell态分发,提出了一种探测设备无关的三方量子秘密共享协议.代理方通过引入光子的空间自由度编码,并进行单光子极化和空间模式两个自由度的Bell态测量,从而建立通信三方的联系,实现三方的秘密共享.该量子秘密共享协议可以用线性光学元件实现,保证了其实用性.此外,验证了该协议的安全性,并展示了其对两种常见攻击方式的抵抗能力.Imperfect single-photon detectors can lead to security flaws such as key information leakage and malicious information injection.We propose a three-party detector-device-independent quantum secret sharing protocol based on the singlephoton Bell-state measurement and two-photon Bell-state distribution.Two agents develop connections among three communication parties by implementing spatial encoding of photons and performing single-photon Bell-state measurements in both polarization and spatial mode degrees of freedom,resulting in secret sharing among the three parties.This protocol can be implemented with linear optical elements and is simple for practical applications.Furthermore,we prove the security of the protocol and demonstrate its resistance to two common eavesdropping attacks.

关 键 词：量子密码 超编码光子 量子秘密共享 单光子Bell态测量 

分 类 号：TN918[电子电信—通信与信息系统] O413[电子电信—信息与通信工程]