Phys. Rev. A 74, 032302 (2006) [9 pages]Efficient-phase-encoding protocols for continuous-variable quantum key distribution using coherent states and postselectionReceived 16 June 2006; published 1 September 2006 We propose efficient-phase-encoding protocols for continuous-variable quantum key distribution using coherent states and postselection. By these phase encodings, the probability of basis mismatch is reduced and total efficiency is increased. We also propose mixed-state protocols by omitting a part of classical communication steps in the efficient-phase-encoding protocols. The omission implies a reduction of information to an eavesdropper and possibly enhances the security of the protocols. We investigate the security of the protocols against individual beam splitting attack. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.74.032302
DOI:
10.1103/PhysRevA.74.032302
PACS:
03.67.Dd, 42.50.Lc
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