|
related topics |
{key, protocol, security} |
{photon, photons, single} |
{state, phys, rev} |
{spin, pulse, spins} |
{alice, bob, state} |
{state, states, coherent} |
|
Quantum Key Distribution with High Loss: Toward Global Secure
Communication
W. -Y. Hwang
abstract: 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.
- oai_identifier:
- oai:arXiv.org:quant-ph/0211153
- categories:
- quant-ph
- comments:
- derivation made more detailed, 4 pages, RevTex
- doi:
- 10.1103/PhysRevLett.91.057901
- arxiv_id:
- quant-ph/0211153
- journal_ref:
- Physical Review Letters 91, 057901 (2003)
- created:
- 2002-11-24
- updated:
- 2003-05-19
Full article ▸
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