Quantum cryptography protocol

Details Quantum cryptography protocol Quantum cryptography protocol

H - Electricity

04

L

H04L 9/08 (2006.01)

Patent

CA 2506516

An apparatus and method for implementing a quantum cryptography system encoding bit values on approximations of elementary quantum systems with provable and absolute security against photon number splitting attacks. The emitter encodes the bit values onto pairs of non-orthogonal states belonging to at least two sets, and such that there does not exist a single quantum operation allowing to reduce the overlap of the states in all the sets simultaneously.

L'invention concerne un appareil et un procédé permettant d'implémenter un système de cryptographie quantique codant des valeurs binaires sur des approximations de systèmes quantiques élémentaires avec une sécurité prouvable et absolue face aux attaques de division du nombre de photons. L'émetteur permet de coder les valeurs binaires sur des paires d'états non orthogonaux appartenant à au moins deux séries, et de telle manière qu'il n'existe pas une seule opération quantique permettant de diminuer le chevauchement des états dans toutes les séries de façon simultanée.

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