dorsal/arxiv
View SchemaUnambiguous state discrimination in quantum cryptography with weak coherent states
| Authors | Miloslav Dusek, Mika Jahma, Norbert Lütkenhaus |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9910106 |
| URL | https://arxiv.org/abs/quant-ph/9910106 |
| DOI | 10.1103/PhysRevA.62.022306 |
| Journal | Physical Review A, Vol. 62, 022306 (2000). |
Abstract
The use of linearly independent signal states in realistic implementations of quantum key distribution (QKD) enables an eavesdropper to perform unambiguous state discrimination. We explore quantitatively the limits for secure QKD imposed by this fact taking into account that the receiver can monitor to some extend the photon number statistics of the signals even with todays standard detection schemes. We compare our attack to the beamsplitting attack and show that security against beamsplitting attack does not necessarily imply security against the attack considered here.
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"abstract": "The use of linearly independent signal states in realistic implementations of\nquantum key distribution (QKD) enables an eavesdropper to perform unambiguous\nstate discrimination. We explore quantitatively the limits for secure QKD\nimposed by this fact taking into account that the receiver can monitor to some\nextend the photon number statistics of the signals even with todays standard\ndetection schemes. We compare our attack to the beamsplitting attack and show\nthat security against beamsplitting attack does not necessarily imply security\nagainst the attack considered here.",
"arxiv_id": "quant-ph/9910106",
"authors": [
"Miloslav Dusek",
"Mika Jahma",
"Norbert L\u00fctkenhaus"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.62.022306",
"journal_ref": "Physical Review A, Vol. 62, 022306 (2000).",
"title": "Unambiguous state discrimination in quantum cryptography with weak coherent states",
"url": "https://arxiv.org/abs/quant-ph/9910106"
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