Decoy-state method for subcarrier-multiplexed frequency-coded quantum key distribution

被引：2

作者：

Bhattacharya, Sudeshna ^{[1
]}

Krishnamurthy, Pradeep Kumar ^{[1
,2
]}

机构：

[1] Indian Inst Technol, Ctr Laser Technol, Kanpur 208016, Uttar Pradesh, India

[2] Indian Inst Technol, Dept Elect Engn, Kanpur 208016, Uttar Pradesh, India

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2013年 / 30卷 / 04期

关键词：

TRANSMISSION-SYSTEM; CRYPTOGRAPHY; MODULATION;

D O I：

10.1364/JOSAB.30.000782

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose a decoy-state method to increase key generation rate of frequency-coded (FC) implementation of B92 quantum key distribution (QKD) protocol. Direct application of decoy-state method to FC-QKD results in a security loophole. We overcome this loophole by optimizing the ratio of decoy-to-signal carrier photon number to unity. Simulation results for a single-channel FC-QKD show 16 kbits of raw key length at a transmission distance of 70 km. We then extend the decoy-state method to subcarrier-multiplexed FC-QKD. We show that key generation rate and secure link length improves by a factor of 5 and 40 km, respectively, compared to single-carrier with decoy-state method. (C) 2013 Optical Society of America

引用

页码：782 / 787

页数：6

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