Unconditional security of the Bennett 1992 quantum key-distribution scheme with strong reference pulse
Quantum Physics
2013-05-29 v2
Abstract
We prove the unconditional security of the original Bennett 1992 protocol with strong reference pulse. We show that we may place a projection onto suitably defined qubit spaces before the receiver, which makes the analysis as simple as qubit-based protocols. Unlike the single-photon-based qubits, the qubits identified in this scheme are almost surely detected by the receiver even after a lossy channel. This leads to the key generation rate that is proportional to the channel transmission rate for proper choices of experimental parameters.
Cite
@article{arxiv.quant-ph/0607082,
title = {Unconditional security of the Bennett 1992 quantum key-distribution scheme with strong reference pulse},
author = {Kiyoshi Tamaki and Norbert Lütkenhaus and Masato Koashi and Jamie Batuwantudawe},
journal= {arXiv preprint arXiv:quant-ph/0607082},
year = {2013}
}
Comments
More detailed presentation and a bit modified security proof