设备无关量子密钥分配的理论和实验研究

项目名称： 设备无关量子密钥分配的理论和实验研究

项目编号： No.61201239

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 陈巍

作者单位： 中国科学技术大学

项目金额： 25万元

中文摘要： 设备无关量子密钥分配（DIQKD）可以使实际量子密码设备的安全性不依赖于物理实现的可靠性，是量子密码领域近年来最具影响力的突破性概念之一。半设备无关（Semi-DIQKD）和测量端设备无关（MDIQKD）协议是两类具有代表性的设备无关QKD协议，有望解决基于纠缠的原始DIQKD协议效率较低、对探测效率和信道衰减要求苛刻的问题，具有较大的潜在实用价值。本项目拟对这两类协议的应用基础问题进行研究。1）在Semi-DIQKD研究方面，首先研究基于量子关联进行协议安全性证明和密钥生成率估计的方法，在此基础上着力研究基于维度限定构造新型协议的方法；2）在MDIQKD方面，首先研究基于纠缠提纯的MDIQKD协议安全性证明和密钥生成率公式，进一步研究可实现远距离密钥分发的MDIQKD实现方案并加以验证。通过以上研究，有望解决DIQKD实用化进程中的一些关键问题，其成果将最终促进量子密码行业的发展。

中文关键词： 量子密钥分发；设备无关；测量设备无关；半设备无关；参考系无关

英文摘要： Device-independent quantum key distribution (DIQKD) can provide strongest form of security achievements by quantum means, since its security proof only relies on quantum mechanics and the fact that there is no information leakage from the honest parties. To apply the DIQKD in real-life scenarios, there are several critical problem must be resolved. First of all, the security proof under coherent attack. Second, the efficiency of DIQKD protocols based on entanglement are too low to be usable. The last one, the critical requirement to single photon detection efficiency and the loss of quantum channel lead to a detection loophole. We plan to focus on two DI QKD protocols, which are semi-DIQKD and MDIQKD, and research the three aspects of them. Firstly, we plan to research the security proof method of Semi-DIQKD and MDIQKD, including the security key rate calculating criteria. Secondly, we will design a new type of Semi-DIQKD protocol based on dimension-witness inequality, and provide its secure key rate. At last, we plan to design an experiment scheme of MDIQKD protocol which can fulfill key distribution in a long distance fiber quantum channel.

英文关键词： quantum key distribution；device independent；measurement device independent；semi device independent；reference frame independent