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Quantum Key Distribution with High Loss: Toward Global Secure Communication

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arxiv quant-ph/0211153 v5 pith:O6UCFB3J submitted 2002-11-24 quant-ph

classification quant-ph
keywords lossdecoy-statespulsesprotocolsignaldistributionhighmulti-photon
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We propose a decoy-state method to overcome the photon-number-splitting attack for Bennett-Brassard 1984 quantum key distribution protocol in the presence of high loss: A legitimate user intentionally and randomly replaces signal pulses by multi-photon pulses (decoy-states). Then they check the loss of the decoy-states. If the loss of the decoy-states is abnormally less than that of signal pulses, the whole protocol is aborted. Otherwise, to continue the protocol, they estimate loss of signal multi-photon pulses based on that of decoy-states. This estimation can be done with an assumption that the two losses have similar values, that we justify.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Demonstration of Quantum-Secure Communications in a Nuclear Reactor

    quant-ph 2025-05 conditional novelty 6.0 of 10

    A commercial QKD system inside a licensed research reactor encrypted reactor data at up to 320 kbps, with 82-140 km distances simulated by attenuators and a delay line.

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