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Practical long distance quantum key distribution

Jim Harrington, Los Alamos National Laboratory

(Session 11 : Sunday from 09:15-09:45)

Abstract. We implemented a quantum key distribution protocol of phase-encoded BB84 with decoy states in optical fiber, and we achieved secret bits over more than 140 km with high confidence of security against any eavesdropping attack. The protocol included finite statistics effects for decoy state analysis, reconciliation, deskewing, information estimate, and privacy amplification.