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Optik

A simultaneous generation of QKD and QDC via optical memory array for distributed network security

P. Pongwongtragull, Somsak Mitatha, Preecha P. Yupapin

Published Mar 30, 2010• 3 citations
Publisher
DOI
10.1016/j.ijleo.2009.09.001

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Quantum key distribution (QKD) networks constitute promising solutions for secure communication. Beyond conventional point-to-point QKD, we developed 1xN QKD network systems with a sub-ns resolution optical path length compensation scheme. With a practical plug-and-play QKD architecture and compact timing control modules based on a field programmable gate array (FPGA), we achieved long term stable operation of a 1x64 QKD network system. Using this architecture, 64 users can simultaneously share secret keys with one server, without using complex software algorithms and expensive hardware. We demonstrated the working of a 1x4 QKD network system using the fiber network of a metropolitan area.