dorsal/arxiv
View SchemaQuantum cryptography on noisy channels: quantum versus classical key-agreement protocols
| Authors | N. Gisin, S. Wolf |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9902048 |
| URL | https://arxiv.org/abs/quant-ph/9902048 |
| DOI | 10.1103/PhysRevLett.83.4200 |
| Journal | Phys.Rev.Lett.83:4200-4203,1999 |
Abstract
When the 4-state or the 6-state protocol of quantum cryptography is carried out on a noisy (i.e. realistic) quantum channel, then the raw key has to be processed to reduce the information of an adversary Eve down to an arbitrarily low value, providing Alice and Bob with a secret key. In principle, quantum algorithms as well as classical algorithms can be used for this processing. A natural question is: up to which error rate on the raw key is a secret-key agreement at all possible? Under the assumption of incoherent eavesdropping, we find that the quantum and classical limits are precisely the same: as long as Alice and Bob share some entanglement both quantum and classical protocols provide secret keys.
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"abstract": "When the 4-state or the 6-state protocol of quantum cryptography is carried\nout on a noisy (i.e. realistic) quantum channel, then the raw key has to be\nprocessed to reduce the information of an adversary Eve down to an arbitrarily\nlow value, providing Alice and Bob with a secret key. In principle, quantum\nalgorithms as well as classical algorithms can be used for this processing. A\nnatural question is: up to which error rate on the raw key is a secret-key\nagreement at all possible? Under the assumption of incoherent eavesdropping, we\nfind that the quantum and classical limits are precisely the same: as long as\nAlice and Bob share some entanglement both quantum and classical protocols\nprovide secret keys.",
"arxiv_id": "quant-ph/9902048",
"authors": [
"N. Gisin",
"S. Wolf"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.83.4200",
"journal_ref": "Phys.Rev.Lett.83:4200-4203,1999",
"title": "Quantum cryptography on noisy channels: quantum versus classical key-agreement protocols",
"url": "https://arxiv.org/abs/quant-ph/9902048"
},
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