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

Won Young Hwang, David Ahn, Sung Woo Hwang

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13 Scopus citations

Abstract

We calculate eavesdropper's optimal information on raw bits in Bennett-Brassard 1984 quantum key distribution (BB84 QKD) and six-state scheme in coherent attacks, using a formula by Lo and Chau (Science 283 (1999) 2050) with single photon assumption. We find that eavesdropper's optimal information in QKD without public announcement of bases (Phys. Lett. A 244 (1998) 489) is the same as that of a corresponding QKD with it in the coherent attack. We observe a sum-rule concerning each party's information.

Original languageEnglish
Pages (from-to)133-138
Number of pages6
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume279
Issue number3-4
DOIs
StatePublished - 29 Jan 2001

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