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Proceedings Paper

Demonstration of an active quantum key distribution network
Author(s): Xiao Tang; Lijun Ma; Alan Mink; Anastase Nakassis; Hai Xu; Barry Hershman; Joshua Bienfang; David Su; Ronald F. Boisvert; Charles Clark; Carl Williams
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Paper Abstract

We previously demonstrated a high speed, point to point, quantum key distribution (QKD) system with polarization coding over a fiber link, in which the resulting cryptographic keys were used for one-time pad encryption of real time video signals. In this work, we extend the technology to a three-node active QKD network - one Alice and two Bobs. A QKD network allows multiple users to generate and share secure quantum keys. In comparison with a passive QKD network, nodes in an active network can actively select a destination as a communication partner and therefore, its sifted-key rate can remain at a speed almost as high as that in the point-to-point QKD. We demonstrate our three-node QKD network in the context of a QKD secured real-time video surveillance system. In principle, the technologies for the three-node network are extendable to multi-node networks easily. In this paper, we report our experiments, including the techniques for timing alignment and polarization recovery during switching, and discuss the network architecture and its expandability to multi-node networks.

Paper Details

Date Published: 29 August 2006
PDF: 6 pages
Proc. SPIE 6305, Quantum Communications and Quantum Imaging IV, 630506 (29 August 2006); doi: 10.1117/12.679589
Show Author Affiliations
Xiao Tang, National Institute of Standards and Technology (United States)
Lijun Ma, National Institute of Standards and Technology (United States)
Alan Mink, National Institute of Standards and Technology (United States)
Anastase Nakassis, National Institute of Standards and Technology (United States)
Hai Xu, National Institute of Standards and Technology (United States)
Barry Hershman, National Institute of Standards and Technology (United States)
Joshua Bienfang, National Institute of Standards and Technology (United States)
David Su, National Institute of Standards and Technology (United States)
Ronald F. Boisvert, National Institute of Standards and Technology (United States)
Charles Clark, National Institute of Standards and Technology (United States)
Carl Williams, National Institute of Standards and Technology (United States)


Published in SPIE Proceedings Vol. 6305:
Quantum Communications and Quantum Imaging IV
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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