Security of distributed-phase-reference quantum key distribution.
Distributed-phase-reference quantum key distribution stands out for its easy implementation with present day technology. For many years, a full security proof of these schemes in a realistic setting has been elusive. We solve this long-standing problem and present a generic method to prove the security of such protocols against general attacks. To illustrate our result, we provide lower bounds on the key generation rate of a variant of the coherent-one-way quantum key distribution protocol. In contrast to standard predictions, it appears to scale quadratically with the system transmittance.
Naturwissenschaftlich-Technische Fakultät, Universität Siegen, Walter-Flex-Straße 3, D-57068 Siegen, Germany.
Tobias
T
Moroder
Marcos
M
Curty
Charles Ci Wen
CC
Lim
Le Phuc
le P
Thinh
Hugo
H
Zbinden
Nicolas
N
Gisin