dorsal/arxiv
View SchemaPractical quantum key distribution over a 48-km optical fiber network
| Authors | Richard J. Hughes, George L. Morgan, C. Glen Peterson |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9904038 |
| URL | https://arxiv.org/abs/quant-ph/9904038 |
| DOI | 10.1080/09500340008244058 |
Abstract
The secure distribution of the secret random bit sequences known as "key" material, is an essential precursor to their use for the encryption and decryption of confidential communications. Quantum cryptography is a new technique for secure key distribution with single-photon transmissions: Heisenberg's uncertainty principle ensures that an adversary can neither successfully tap the key transmissions, nor evade detection (eavesdropping raises the key error rate above a threshold value). We have developed experimental quantum cryptography systems based on the transmission of non-orthogonal photon states to generate shared key material over multi-kilometer optical fiber paths and over line-of-sight links. In both cases, key material is built up using the transmission of a single-photon per bit of an initial secret random sequence. A quantum-mechanically random subset of this sequence is identified, becoming the key material after a data reconciliation stage with the sender. Here we report the most recent results of our optical fiber experiment in which we have performed quantum key distribution over a 48-km optical fiber network at Los Alamos using photon interference states with the B92 and BB84 quantum key distribution protocols.
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"abstract": "The secure distribution of the secret random bit sequences known as \"key\"\nmaterial, is an essential precursor to their use for the encryption and\ndecryption of confidential communications. Quantum cryptography is a new\ntechnique for secure key distribution with single-photon transmissions:\nHeisenberg\u0027s uncertainty principle ensures that an adversary can neither\nsuccessfully tap the key transmissions, nor evade detection (eavesdropping\nraises the key error rate above a threshold value). We have developed\nexperimental quantum cryptography systems based on the transmission of\nnon-orthogonal photon states to generate shared key material over\nmulti-kilometer optical fiber paths and over line-of-sight links. In both\ncases, key material is built up using the transmission of a single-photon per\nbit of an initial secret random sequence. A quantum-mechanically random subset\nof this sequence is identified, becoming the key material after a data\nreconciliation stage with the sender. Here we report the most recent results of\nour optical fiber experiment in which we have performed quantum key\ndistribution over a 48-km optical fiber network at Los Alamos using photon\ninterference states with the B92 and BB84 quantum key distribution protocols.",
"arxiv_id": "quant-ph/9904038",
"authors": [
"Richard J. Hughes",
"George L. Morgan",
"C. Glen Peterson"
],
"categories": [
"quant-ph"
],
"doi": "10.1080/09500340008244058",
"title": "Practical quantum key distribution over a 48-km optical fiber network",
"url": "https://arxiv.org/abs/quant-ph/9904038"
},
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