Security of two-way quantum key distribution

被引：64

作者：

Beaudry, Normand J. ^{[1
]}

Lucamarini, Marco ^{[2
]}

Mancini, Stefano ^{[3
]}

Renner, Renato ^{[1
]}

机构：

[1] ETH, Inst Theoret Phys, CH-8093 Zurich, Switzerland

[2] Toshiba Res Europe Ltd, Cambridge Res Lab, Cambridge CB4 0GZ, England

[3] Univ Camerino, Sch Sci & Technol, I-62032 Camerino, Italy

来源：

PHYSICAL REVIEW A | 2013年 / 88卷 / 06期

基金：

欧洲研究理事会;

关键词：

IMPLEMENTATION; COMMUNICATION; PROTOCOL;

D O I：

10.1103/PhysRevA.88.062302

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Quantum key distribution protocols typically make use of a one-way quantum channel to distribute a shared secret string to two distant users. However, protocols exploiting a two-way quantum channel have been proposed as an alternative route to the same goal, with the potential advantage of outperforming one-way protocols. Here we provide a strategy to prove security for two-way quantum key distribution protocols against the most general quantum attack possible by an eavesdropper. We utilize an entropic uncertainty relation, and only a few assumptions need to be made about the devices used in the protocol. We also show that a two-way protocol can outperform comparable one-way protocols.

引用

页数：9

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