Key distribution in a multiple access network using quantum...

H - Electricity – 04 – L

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H04L 9/08 (2006.01) H04L 9/28 (2006.01)

Patent

CA 2169552

In a method of quantum cryptography, a transmit- ter (T) communicates on a quantum channel with sev- eral receivers (R1-R3). The receivers are located on dif- ferent branches of a common communications network. The method established a different respective secret key for each receiver. A timing pulse may be transmitted from the transmitter to the receivers to synchronise the receivers prior to a transmission on a quantum channel. The quantum channel may be multiplexed and trans- mitted concurrently with classical multi-photon trans- missions on the network.

Dans un procédé de cryptographie quantique, un émetteur (T) communique sur un canal quantique avec plusieurs récepteurs (R1-R3). Les récepteurs sont situés sur différents branchements d'un réseau de communications commun. Le procédé établit un code secret, respectif, différent, pour chaque récepteur. Une impulsion de synchronisation peut être transmise de l'émetteur vers les récepteurs afin de synchroniser les récepteurs avant une transmission sur un canal quantique. Le canal quantique peut être multiplexé et transmis en même temps que des transmissions classiques multiphotons sur le réseau.

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