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A quantum bit commitment scheme provably unbreakable by both parties

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4 Author(s)
Brassard, G. ; Dept. d''Inf. et de Recherche Oper., Montreal Univ., Que., Canada ; Crepeau, C. ; Jozsa, R. ; Langlois, D.

We describe a complete protocol for bit commitment based on the transmission of polarized photons. We show that under the laws of quantum physics, this protocol cannot be cheated by either party except with exponentially small probability (exponential in the running time needed to implement the honest protocol). A more thorough analysis is required to adjust all the constants used in this paper to get the best performance from our construction. Better performances may probably be achieved by using a third conjugate transmission-reception basis of circular polarization

Published in:

Foundations of Computer Science, 1993. Proceedings., 34th Annual Symposium on

Date of Conference:

3-5 Nov 1993