dorsal/arxiv
View SchemaLower and upper bounds on the secret key rate for QKD protocols using one--way classical communication
| Authors | B. Kraus, N. Gisin, R. Renner |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0410215 |
| URL | https://arxiv.org/abs/quant-ph/0410215 |
| DOI | 10.1103/PhysRevLett.95.080501 |
| Journal | Phys. Rev. Lett. 95, 080501 (2005) |
Abstract
We investigate a general class of quantum key distribution (QKD) protocols using one-way classical communication. We show that full security can be proven by considering only collective attacks. We derive computable lower and upper bounds on the secret key rate of those QKD protocol involving only entropies of two--qubit density operators. As an illustration of our results, we determine new bounds for the BB84, the six-state, and the B92 protocol. We show that in all these cases the first classical processing that the legitimate partners should apply consists in adding noise. This is precisely why any entanglement based proof would generally fail here.
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"abstract": "We investigate a general class of quantum key distribution (QKD) protocols\nusing one-way classical communication. We show that full security can be proven\nby considering only collective attacks. We derive computable lower and upper\nbounds on the secret key rate of those QKD protocol involving only entropies of\ntwo--qubit density operators. As an illustration of our results, we determine\nnew bounds for the BB84, the six-state, and the B92 protocol. We show that in\nall these cases the first classical processing that the legitimate partners\nshould apply consists in adding noise. This is precisely why any entanglement\nbased proof would generally fail here.",
"arxiv_id": "quant-ph/0410215",
"authors": [
"B. Kraus",
"N. Gisin",
"R. Renner"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.95.080501",
"journal_ref": "Phys. Rev. Lett. 95, 080501 (2005)",
"title": "Lower and upper bounds on the secret key rate for QKD protocols using one--way classical communication",
"url": "https://arxiv.org/abs/quant-ph/0410215"
},
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