多用户量子密钥分配方案及协议设计

doi:10.3969/j.issn.1001-2400.2012.05.002

J4 ›› 2012, Vol. 39 ›› Issue (5): 6-11.doi: 10.3969/j.issn.1001-2400.2012.05.002

多用户量子密钥分配方案及协议设计

刘晓慧^1,2;裴昌幸¹;聂敏²

(1. 西安电子科技大学综合业务网理论及关键技术国家重点实验室，陕西西安 710071；
2. 西安邮电大学通信与信息工程学院，陕西西安 710061)

收稿日期:2011-12-26 出版日期:2012-10-20 发布日期:2012-12-13
通讯作者: 刘晓慧
作者简介:刘晓慧(1976-)，女，西安电子科技大学博士研究生，E-mail: xhliu@mail.xidian.edu.cn．
基金资助:
国家自然科学基金资助项目(61072067，61172071);高等学校学科创新引智计划资助项目(B08038);国家重点实验室专项资金资助项目(ISN1001004);陕西省自然科学基础研究计划资助项目(2010JM8021);陕西省教育厅专项科研计划资助项目(2010JK834，2011JK1017)

Multi-user quantum key distribution model and the correlative protocol

LIU Xiaohui^1,2;PEI Changxing¹;NIE Min²

(1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an 710071， China;
2. School of Communication and Information Engineering, Xi'an Univ. of Post and Telecommunication, Xi'an 710071, China)

Received:2011-12-26 Online:2012-10-20 Published:2012-12-13
Contact: LIU Xiaohui

摘要/Abstract

摘要：

在纠缠态和纠缠交换的基础上，提出一种多用户量子密钥分发方案及协议．该方案只需n个量子信道就可实现n用户系统两两之间的密钥分发．量子交换中心通过纠缠交换建立量子信道，量子信道一旦建立，系统中任意两个用户即可进行量子密钥分发．还探讨了系统容量问题，结合话务量的概念，给出了量子Bell基测量单元数m与用户数n的关系式．量子交换中心完成纠缠交换后不再介入密钥分发，从而保证了通信的安全性．

关键词: 多用户量子密钥分配, 量子交换中心, 纠缠交换, Bell基测量

Abstract:

We propose a Multi-user Quantum Key Distribution (MQKD) protocol, which only needs n quantum channels for a communication system of n users to realize the protocol with entangled states and entanglement swapping. By the quantum mediator, any two among n users of the system can communicate with each other, even though there is no direct quantum channel between them. Based on the traffic theory, we present a relationship formula of the number of user n and the number of Bell state measurement units m. Because entanglement swapping entangles the quantum states of the two users, the quantum mediator has no way to fraudulently intervene in or eavesdrop on the communication.

Key words: multi-user quantum key distribution, quantum swapping center, entanglement swapping, Bell state measurement

中图分类号:

TN918

刘晓慧;裴昌幸;聂敏. 多用户量子密钥分配方案及协议设计[J]. J4, 2012, 39(5): 6-11.

LIU Xiaohui;PEI Changxing;NIE Min. Multi-user quantum key distribution model and the correlative protocol[J]. J4, 2012, 39(5): 6-11.

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多用户量子密钥分配方案及协议设计

Multi-user quantum key distribution model and the correlative protocol

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