Quantum key distribution with finite resources: Secret key rates via Renyi entropies

被引：11

作者：

Abruzzo, Silvestre ^{[1
]}

Kampermann, Hermann ^{[1
]}

Mertz, Markus ^{[1
]}

Bruss, Dagmar ^{[1
]}

机构：

[1] Univ Dusseldorf, Inst Theoret Phys 3, D-40225 Dusseldorf, Germany

来源：

PHYSICAL REVIEW A | 2011年 / 84卷 / 03期

关键词：

UNCONDITIONAL SECURITY; PROOF;

D O I：

10.1103/PhysRevA.84.032321

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A realistic quantum key distribution (QKD) protocol necessarily deals with finite resources, such as the number of signals exchanged by the two parties. We derive a bound on the secret key rate which is expressed as an optimization problem over Renyi entropies. Under the assumption of collective attacks by an eavesdropper, a computable estimate of our bound for the six-state protocol is provided. This bound leads to improved key rates in comparison to previous results.

引用

页数：10

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