Developments towards practical free-space quantum cryptography

Tapster, P.R., Gorman, P.M., Benton, D.M., Taylor, D.M. and Lowans, B.S. (2005). Developments towards practical free-space quantum cryptography. IN: Quantum information and computation III. Donkor, Eric J.; Pirich, Andrew R. and Brandt, Howard E. (eds) SPIE proceedings . SPIE.

Abstract

We describe a free space quantum cryptography system which is designed to allow continuous unattended key exchanges for periods of several days, and over ranges of a few kilometres. The system uses a four-laser faint-pulse transmission system running at a pulse rate of 10MHz to generate the required four alternative polarization states. The receiver module similarly automatically selects a measurement basis and performs polarization measurements with four avalanche photodiodes. The controlling software can implement the full key exchange including sifting, error correction, and privacy amplification required to generate a secure key.

Publication DOI: https://doi.org/10.1117/12.605539
Divisions: Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: P. R. Tapster ; P. M. Gorman ; D. M. Benton ; D. M. Taylor and B. S. Lowans, "Developments towards practical free-space quantum cryptography", Proc. SPIE 5815, Quantum Information and Computation III, 176 (June 02, 2005). Copyright 2005 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. doi: http://dx.doi.org/10.1117/12.605539
Event Title: Quantum Information and Computation III
Event Type: Other
Event Dates: 2005-03-28
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2005-01-01
Authors: Tapster, P.R.
Gorman, P.M.
Benton, D.M. ( 0000-0003-0663-1404)
Taylor, D.M.
Lowans, B.S.

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