Practical aspects of quantum crypotography

Hugo Zbinden; Gregoire Ribordy; Nicolas Gisin

doi:10.1117/12.300904

1 February 1998 Practical aspects of quantum crypotography

Hugo Zbinden, Gregoire Ribordy, Nicolas Gisin

Proceedings Volume 3228, Multimedia Networks: Security, Displays, Terminals, and Gateways; (1998) https://doi.org/10.1117/12.300904
Event: Voice, Video, and Data Communications, 1997, Dallas, TX, United States

Abstract

We discuss three problems of practical quantum cryptography: continuous alignment, nose of the photon counters and eavesdropping. We present a new self-balanced interferometric setup using Faraday mirrors. This phase- coding setup needs no alignment of the interferometer nor polarization control, and therefore considerably facilitates the experiment. Moreover it features excellent fringe visibility. The importance of the detector noise is illustrated and means of reducing it are presented. Maximal distances and bit rates achievable with present day technologies are evaluated. Finally, practical eavesdropping strategies taking advantages of the optical fiber that could open a gate into the transmitter's receiver's offices are discussed.

Citation Download Citation

Hugo Zbinden, Gregoire Ribordy, and Nicolas Gisin "Practical aspects of quantum crypotography", Proc. SPIE 3228, Multimedia Networks: Security, Displays, Terminals, and Gateways, (1 February 1998); https://doi.org/10.1117/12.300904

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