dorsal/arxiv
View SchemaTowards practical and fast Quantum Cryptography
| Authors | Nicolas Gisin, Gregoire Ribordy, Hugo Zbinden, Damien Stucki, Nicolas Brunner, Valerio Scarani |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0411022 |
| URL | https://arxiv.org/abs/quant-ph/0411022 |
Abstract
We present a new protocol for practical quantum cryptography, tailored for an implementation with weak coherent pulses. The key is obtained by a very simple time-of-arrival measurement on the data line; an interferometer is built on an additional monitoring line, allowing to monitor the presence of a spy (who would break coherence by her intervention). Against zero-error attacks (the analog of photon-number-splitting attacks), this protocol performs as well as standard protocols with strong reference pulses: the key rate decreases only as the transmission $t$ of the quantum channel. We present also two attacks that introduce errors on the monitoring line: the intercept-resend, and a coherent attack on two subsequent pulses. Finally, we sketch several possible variations of this protocol.
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"abstract": "We present a new protocol for practical quantum cryptography, tailored for an\nimplementation with weak coherent pulses. The key is obtained by a very simple\ntime-of-arrival measurement on the data line; an interferometer is built on an\nadditional monitoring line, allowing to monitor the presence of a spy (who\nwould break coherence by her intervention). Against zero-error attacks (the\nanalog of photon-number-splitting attacks), this protocol performs as well as\nstandard protocols with strong reference pulses: the key rate decreases only as\nthe transmission $t$ of the quantum channel. We present also two attacks that\nintroduce errors on the monitoring line: the intercept-resend, and a coherent\nattack on two subsequent pulses. Finally, we sketch several possible variations\nof this protocol.",
"arxiv_id": "quant-ph/0411022",
"authors": [
"Nicolas Gisin",
"Gregoire Ribordy",
"Hugo Zbinden",
"Damien Stucki",
"Nicolas Brunner",
"Valerio Scarani"
],
"categories": [
"quant-ph"
],
"title": "Towards practical and fast Quantum Cryptography",
"url": "https://arxiv.org/abs/quant-ph/0411022"
},
"schema_id": "dorsal/arxiv",
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"execution_id": "90c44edb-694f-4433-b7b5-dff8add474c2",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
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