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Phys Rev Lett. 2004 Feb 6;92(5):057901. Epub 2004 Feb 6.

Quantum cryptography protocols robust against photon number splitting attacks for weak laser pulse implementations.

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  • 1Group of Applied Physics, University of Geneva, 20, rue de l'Ecole-de-Médecine, CH-1211 Geneva 4, Switzerland.


We introduce a new class of quantum key distribution protocols, tailored to be robust against photon number splitting (PNS) attacks. We study one of these protocols, which differs from the original protocol by Bennett and Brassard (BB84) only in the classical sifting procedure. This protocol is provably better than BB84 against PNS attacks at zero error.

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