Implementation of two-party protocols in the noisy-storage model

Details Implementation of two-party protocols in the noisy-storage model Implementation of two-party protocols in the noisy-storage model

2009-11-12

arxiv.org/abs/0911.2302v2

Phys. Rev. A 81, 052336 (2010)

Physics

Quantum Physics

41 pages, 33 figures, this is a companion paper to arXiv:0906.1030 considering practical aspects, v2: published version, title

Scientific paper

10.1103/PhysRevA.81.052336

The noisy-storage model allows the implementation of secure two-party protocols under the sole assumption that no large-scale reliable quantum storage is available to the cheating party. No quantum storage is thereby required for the honest parties. Examples of such protocols include bit commitment, oblivious transfer and secure identification. Here, we provide a guideline for the practical implementation of such protocols. In particular, we analyze security in a practical setting where the honest parties themselves are unable to perform perfect operations and need to deal with practical problems such as errors during transmission and detector inefficiencies. We provide explicit security parameters for two different experimental setups using weak coherent, and parametric down conversion sources. In addition, we analyze a modification of the protocols based on decoy states.

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