Eavesdropper's optimal information in variations of Bennett-Brassard 1984 quantum key distribution in the coherent attacks

Authors
Hwang, WY Ahn, D Hwang, SW
Citation
Wy. Hwang et al., Eavesdropper's optimal information in variations of Bennett-Brassard 1984 quantum key distribution in the coherent attacks, PHYS LETT A, 279(3-4), 2001, pp. 133-138
Citations number
41
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS A
ISSN journal
03759601 → ACNP
Volume
279
Issue
3-4
Year of publication
2001
Pages
133 - 138
Database
ISI
SICI code
0375-9601(20010129)279:3-4<133:EOIIVO>2.0.ZU;2-8
Abstract
We calculate eavesdropper's optimal information on raw bits in Bennett-Bras sard 1984 quantum key distribution (BB84 QKD) and six-state scheme in coher ent attacks, using a formula by Lo and Chau (Science 283 (1999) 2050) with single photon assumption. We find that eavesdropper's optimal information i n QKD without public announcement of bases (Phys. Lett. A 244 (1998) 489) i s the same as that of a corresponding QKD with it in the coherent attack. W e observe a sum-rule concerning each party's information. (C) 2001 Elsevier Science B.V. All rights reserved.