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.
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页数：10
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