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

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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 E-mail:xhliu@mail.xidian.edu.cn

Abstract

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

CLC Number:

TN918

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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Multi-user quantum key distribution model and the correlative protocol

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