Article (Author postprint) (172 Kb) - 
Free accessOther version: http://link.aps.org/doi/10.1103/PhysRevA.83.022301
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unige:15858 
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Practical private database queries based on a quantum-key-distribution protocol |
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| Published in | Physical Review. A. 2011, vol. 83, no. 2, p. 022301-1/6 | |
| Abstract | Private queries allow a user, Alice, to learn an element of a database held by a provider, Bob, without revealing which element she is interested in, while limiting her information about the other elements. We propose to implement private queries based on a quantum-key-distribution protocol, with changes only in the classical postprocessing of the key. This approach makes our scheme both easy to implement and loss tolerant. While unconditionally secure private queries are known to be impossible, we argue that an interesting degree of security can be achieved by relying on fundamental physical principles instead of unverifiable security assumptions in order to protect both the user and the database. We think that the scope exists for such practical private queries to become another remarkable application of quantum information in the footsteps of quantum key distribution. | |
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Article (Author postprint) (172 Kb) - Free access Other version: http://link.aps.org/doi/10.1103/PhysRevA.83.022301 |
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| Citation (ISO format) | JAKOBI, Markus et al. Practical private database queries based on a quantum-key-distribution protocol. In: Physical Review. A, 2011, vol. 83, n° 2, p. 022301-1/6. https://archive-ouverte.unige.ch/unige:15858 |
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