title: An experimental implementation of oblivious transfer in the noisy storage model.
abstract: Cryptography's importance in our everyday lives continues to grow in our increasingly digital world. Oblivious transfer has long been a fundamental and important cryptographic primitive, as it is known that general two-party cryptographic tasks can be built from this basic building block. Here we show the experimental implementation of a 1-2 random oblivious transfer protocol by performing measurements on polarization-entangled photon pairs in a modified entangled quantum key distribution system, followed by all of the necessary classical postprocessing including one-way error correction. We successfully exchange a 1,366 bit random oblivious transfer string in ~3 min and include a full security analysis under the noisy storage model, accounting for all experimental error rates and finite size effects. This demonstrates the feasibility of using today's quantum technologies to implement secure two-party protocols.
authors.affiliation: 1] Institute for Quantum Computing and Department of Physics & Astronomy, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1 [2] Centre for Quantum Photonics, H. H. Wills Physics Laboratory & Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol BS8 1UB, UK.
authors.forename: C
authors.initials: C
authors.lastname: Erven
authors.affiliation: Center for Quantum Technologies, National University of Singapore, 2 Science Drive 3, Singapore 117543.
authors.forename: N
authors.initials: N
authors.lastname: Ng
authors.affiliation: Institute for Quantum Computing and Department of Physics & Astronomy, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1.
authors.forename: N
authors.initials: N
authors.lastname: Gigov
authors.affiliation: 1] Institute for Quantum Computing and Department of Physics & Astronomy, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1 [2] Perimeter Institute, 31 Caroline Street North, Waterloo, Ontario, Canada N2L 2Y5.
authors.forename: R
authors.initials: R
authors.lastname: Laflamme
authors.affiliation: 1] Center for Quantum Technologies, National University of Singapore, 2 Science Drive 3, Singapore 117543 [2] School of Computing, National University of Singapore, 13 Computing Drive, Singapore 117417.
authors.forename: S
authors.initials: S
authors.lastname: Wehner
authors.affiliation: 1] Institute for Quantum Computing and Department of Physics & Astronomy, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1 [2] Institut für Experimentalphysik, Universität Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria.
authors.forename: G
authors.initials: G
authors.lastname: Weihs