Title :
Quantum key distribution without a single-photon source using a strong reference
Author :
Guerreau, O.L. ; Malassenet, F.J. ; McLaughlin, S.W. ; Merolla, J.-M.
Author_Institution :
Dept. Opt., GTL-CNRS Telecom, Metz, France
Abstract :
We present a single-sideband scheme that uses an enhanced BB84 protocol with a strong reference. A matrix method allows us to prove that this reference makes the system secure against the photon number splitting attack when using an imperfect laser source. The performance of a stable experimental setup with a fainted laser source is tested using an optimum average energy μ=1 photon per pulse to maximize the final key rate.
Keywords :
quantum cryptography; quantum optics; BB84 protocol; matrix method; photon number splitting; quantum key distribution; Cryptography; Information security; Laser stability; Optical fibers; Optical pulses; Protocols; Pulse measurements; Quantum mechanics; Telecommunications; Testing; Quantum communication; quantum cryptography;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.851050
