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Secure quantum key distribution using continuous variables of single photons.

Abstract:

We analyze the distribution of secure keys using quantum cryptography based on the continuous variable degree of freedom of entangled photon pairs. We derive the information capacity of a scheme based on the spatial entanglement of photons from a realistic source, and show that the standard measures of security known for quadrature-based continuous variable quantum cryptography (CV-QKD) are inadequate. A specific simple eavesdropping attack is analyzed to illuminate how secret information may...

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Publication status:
Published

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics
Silberhorn, C More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Atomic and Laser Physics
Journal:
Physical review letters
Volume:
100
Issue:
11
Pages:
110504
Publication date:
2008-03-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:b6958c12-b89b-4439-a2b4-f350c3481abb
Source identifiers:
29654
Local pid:
pubs:29654
Language:
English

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