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 language | English |
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Pages (from-to) | 133-138 |
Number of pages | 6 |
Journal | Physics Letters, Section A: General, Atomic and Solid State Physics |
Volume | 279 |
Issue number | 3-4 |
DOIs | |
State | Published - 29 Jan 2001 |