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Phys. Rev. A 74, 052325 (2006) [5 pages]

Unconditional security at a low cost

Abstract

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Xiongfeng Ma
Center for Quantum Information and Quantum Control, Department of Physics, University of Toronto, Toronto, Ontario, Canada M5S 1A7

Received 3 August 2006; published 16 November 2006

Bysimulating four quantum key distribution (QKD) experiments and analyzing onedecoy-state QKD experiment, we compare two data postprocessing schemes basedon security against individual attack by Lütkenhaus, and unconditional securityanalysis by Gottesman-Lo-Lütkenhaus-Preskill. Our results show that these two schemesyield close performances. In QKD, since unconditional security is highlysought after, we conclude that one is better off consideringunconditional security, rather than restricting to individual attacks.

©2006 The American Physical Society

URL:	http://link.aps.org/doi/10.1103/PhysRevA.74.052325
DOI:	10.1103/PhysRevA.74.052325
PACS:	03.67.Dd; 03.67.-a; 03.67.Hk 03.67.Dd Quantum cryptography 03.67.-a Quantum information 03.67.Hk Quantum communication YEAR: 2006
KEYWORDS:	quantum cryptography

REFERENCES (33)

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