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Proceedings Paper

Free-space quantum key distribution at night
Author(s): William T. Buttler; Richard J. Hughes; Paul G. Kwiat; Steve K. Lamoreaux; Gabriel G. Luther; George L. Morgan; Jane E. Nordholt; C. Glen Peterson; Charles M. Simmons
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Paper Abstract

An experimental free-space quantum key distribution (QKD) system has been tested over an outdoor optical path of approximately 1 km under nighttime conditions at Los Alamos National Laboratory. This system employs the Bennett 92 protocol; here we give a brief overview of this protocol, and describe our experimental implementation of it. An analysis of the system efficiency is presented as well as a description of our error detection protocol, which employs a 2D parity check scheme. Finally, the susceptibility of this system to eavesdropping by various techniques is determined, and the effectiveness of privacy amplification procedures is discussed. Our conclusions are that free-space QKD is both effective and secure; possible applications include the rekeying of satellites in low earth orbit.

Paper Details

Date Published: 6 July 1998
PDF: 9 pages
Proc. SPIE 3385, Photonic Quantum Computing II, (6 July 1998); doi: 10.1117/12.312638
Show Author Affiliations
William T. Buttler, Los Alamos National Lab. (United States)
Richard J. Hughes, Los Alamos National Lab. (United States)
Paul G. Kwiat, Los Alamos National Lab. (United States)
Steve K. Lamoreaux, Los Alamos National Lab. (United States)
Gabriel G. Luther, Los Alamos National Lab. (United States)
George L. Morgan, Los Alamos National Lab. (United States)
Jane E. Nordholt, Los Alamos National Lab. (United States)
C. Glen Peterson, Los Alamos National Lab. (United States)
Charles M. Simmons, Los Alamos National Lab. (United States)


Published in SPIE Proceedings Vol. 3385:
Photonic Quantum Computing II
Steven P. Hotaling; Andrew R. Pirich, Editor(s)

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