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Proceedings Paper

Practical aspects of quantum crypotography
Author(s): Hugo Zbinden; Gregoire Ribordy; Nicolas Gisin
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Paper 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.

Paper Details

Date Published: 1 February 1998
PDF: 8 pages
Proc. SPIE 3228, Multimedia Networks: Security, Displays, Terminals, and Gateways, (1 February 1998); doi: 10.1117/12.300904
Show Author Affiliations
Hugo Zbinden, Univ. of Geneva (Switzerland)
Gregoire Ribordy, Univ. of Geneva (Switzerland)
Nicolas Gisin, Univ. of Geneva (Switzerland)


Published in SPIE Proceedings Vol. 3228:
Multimedia Networks: Security, Displays, Terminals, and Gateways
Louis S. Lome; V. Michael Bove; Barbara Derryberry; Clifford R. Holliday; Louis S. Lome; Vishal Markandey; Andrew G. Tescher; Bhaskaran Vasudev, Editor(s)

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