一种可提高安全通信距离的诱骗态量子密钥分发方案

doi:10.3969/j.issn.1001-2400.2010.01.003

J4 ›› 2010, Vol. 37 ›› Issue (1): 13-17.doi: 10.3969/j.issn.1001-2400.2010.01.003

一种可提高安全通信距离的诱骗态量子密钥分发方案

刘丹;裴昌幸;权东晓;韩宝彬;赵楠

(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)

收稿日期:2008-11-07 出版日期:2010-02-20 发布日期:2010-03-29
通讯作者: 刘丹
作者简介:刘丹(1981-)，女，西安电子科技大学博士研究生，E-mail: secret_ren@sohu.com．
基金资助:
国家自然科学基金资助项目(60572147，60672119);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基金资助项目(ISN02080002,ISN090307)

New decoy state quantum key distribution for increasing the security communication distance

LIU Dan;PEI Chang-xing;QUAN Dong-xiao;HAN Bao-bin;ZHAO Nan

(State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an 710071， China)

Received:2008-11-07 Online:2010-02-20 Published:2010-03-29
Contact: LIU Dan

摘要/Abstract

摘要：

为提高量子通信安全通信距离，提出一种将修正的相干光(MCS)用于诱骗态量子密钥分发的方案．通过削除弱相干光源中的两光子脉冲，降低多光子脉冲的影响，从而提高安全通信距离．理论分析得到了采用MCS后的单光子计数率和误码率的数学表达式．仿真结果表明，在相同的密钥产生率下，此方案将量子通信的安全通信距离提高约10％，接近完美诱骗态方案的安全通信距离．

关键词: 量子通信, 量子密钥分发, 修正的相干光, 诱骗态

Abstract:

To increase the security distance of quantum communication, a new scheme of decoy state quantum key distribution with a modified coherent state is proposed. The probability of multi-photon pulse in weak coherent source can be decreased by canceling two photon pulses to improve the security distance. Based on the math model of the decoy state QKD, the formula for the yield and error rate of the single photon pulse with the Modified Coherent State is deduced, and substituted in GLLP to calculate the generation rate of quantum keys. Results show that the decoy state with the Modified Coherent State can increase the secure communication distance about 10％, which is very close to that of the perfect decoy state QKD.

Key words: quantum communication, quantum key distribution, modified coherent state, decoy state

刘丹;裴昌幸;权东晓;韩宝彬;赵楠. 一种可提高安全通信距离的诱骗态量子密钥分发方案[J]. J4, 2010, 37(1): 13-17.

LIU Dan;PEI Chang-xing;QUAN Dong-xiao;HAN Bao-bin;ZHAO Nan. New decoy state quantum key distribution for increasing the security communication distance[J]. J4, 2010, 37(1): 13-17.

参考文献

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一种可提高安全通信距离的诱骗态量子密钥分发方案

New decoy state quantum key distribution for increasing the security communication distance

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