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Lunghi T, Kaniewski J, Bussières F, et al. Experimental bit commitment based on quantum communication and special relativity. Phys Rev Lett. 2013;111(18):180504doi: 10.1103/PhysRevLett.111.180504.
Lunghi, T., Kaniewski, J., Bussières, F., Houlmann, R., Tomamichel, M., Kent, A., Gisin, N., Wehner, S., & Zbinden, H. (2013). Experimental bit commitment based on quantum communication and special relativity. Physical review letters, 111(18), 180504. https://doi.org/10.1103/PhysRevLett.111.180504
Lunghi, T, et al. "Experimental bit commitment based on quantum communication and special relativity." Physical review letters vol. 111,18 (2013): 180504. doi: https://doi.org/10.1103/PhysRevLett.111.180504
Lunghi T, Kaniewski J, Bussières F, Houlmann R, Tomamichel M, Kent A, Gisin N, Wehner S, Zbinden H. Experimental bit commitment based on quantum communication and special relativity. Phys Rev Lett. 2013 Nov 01;111(18):180504. doi: 10.1103/PhysRevLett.111.180504. Epub 2013 Nov 01. PMID: 24237497.
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Phys Rev Lett. 2013 Nov 01;111(18):180504. doi: 10.1103/PhysRevLett.111.180504. Epub 2013 Nov 01.

Experimental bit commitment based on quantum communication and special relativity.

Physical review letters

T Lunghi, J Kaniewski, F Bussières, R Houlmann, M Tomamichel, A Kent, N Gisin, S Wehner, H Zbinden

Affiliations

  1. Group of Applied Physics, University of Geneva, CH-1211 Genève 4, Switzerland.

PMID: 24237497 DOI: 10.1103/PhysRevLett.111.180504

Abstract

Bit commitment is a fundamental cryptographic primitive in which Bob wishes to commit a secret bit to Alice. Perfectly secure bit commitment between two mistrustful parties is impossible through asynchronous exchange of quantum information. Perfect security is however possible when Alice and Bob split into several agents exchanging classical and quantum information at times and locations suitably chosen to satisfy specific relativistic constraints. Here we report on an implementation of a bit commitment protocol using quantum communication and special relativity. Our protocol is based on [A. Kent, Phys. Rev. Lett. 109, 130501 (2012)] and has the advantage that it is practically feasible with arbitrary large separations between the agents in order to maximize the commitment time. By positioning agents in Geneva and Singapore, we obtain a commitment time of 15 ms. A security analysis considering experimental imperfections and finite statistics is presented.

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