dorsal/arxiv
View SchemaEfficient Quantum Key Distribution
| Authors | M. Ardehali, H. F. Chau, Hoi-Kwong Lo |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9803007 |
| URL | https://arxiv.org/abs/quant-ph/9803007 |
Abstract
We devise a simple modification that essentially doubles the efficiency of a well-known quantum key distribution scheme proposed by Bennett and Brassard (BB84). Our scheme assigns significantly different probabilities for the different polarization bases during both transmission and reception to reduce the fraction of discarded data. The actual probabilities used in the scheme are announced in public. As the number of transmitted signals increases, the efficiency of our scheme can be made to approach 100%. An eavesdropper may try to break such a scheme by eavesdropping mainly along the predominant basis. To defeat such an attack, we perform a refined analysis of accepted data: Instead of lumping all the accepted data together to estimate a single error rate, we separate the accepted data into various subsets according to the basis employed and estimate an error rate for each subset {\it individually}.
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"abstract": "We devise a simple modification that essentially doubles the efficiency of a\nwell-known quantum key distribution scheme proposed by Bennett and Brassard\n(BB84). Our scheme assigns significantly different probabilities for the\ndifferent polarization bases during both transmission and reception to reduce\nthe fraction of discarded data. The actual probabilities used in the scheme are\nannounced in public. As the number of transmitted signals increases, the\nefficiency of our scheme can be made to approach 100%. An eavesdropper may try\nto break such a scheme by eavesdropping mainly along the predominant basis. To\ndefeat such an attack, we perform a refined analysis of accepted data: Instead\nof lumping all the accepted data together to estimate a single error rate, we\nseparate the accepted data into various subsets according to the basis employed\nand estimate an error rate for each subset {\\it individually}.",
"arxiv_id": "quant-ph/9803007",
"authors": [
"M. Ardehali",
"H. F. Chau",
"Hoi-Kwong Lo"
],
"categories": [
"quant-ph"
],
"title": "Efficient Quantum Key Distribution",
"url": "https://arxiv.org/abs/quant-ph/9803007"
},
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