2024-03-29T02:10:06Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/474402022-11-17T02:08:08Zhdl_2115_20053hdl_2115_145Field test of quantum key distribution in the Tokyo QKD NetworkSasaki, M.Fujiwara, M.Ishizuka, H.Klaus, W.Wakui, K.Takeoka, M.Miki, S.Yamashita, T.Wang, Z.Tanaka, A.Yoshino, K.Nambu, Y.Takahashi, S.Tajima, A.Tomita, A.Domeki, T.Hasegawa, T.Sakai, Y.Kobayashi, H.Asai, T.Shimizu, K.Tokura, T.Tsurumaru, T.Matsui, M.Honjo, T.Tamaki, K.Takesue, H.Tokura, Y.Dynes, J. F.Dixon, A. R.Sharpe, A. W.Yuan, Z. L.Shields, A. J.Uchikoga, S.Legré, M.Robyr, S.Trinkler, P.Monat, L.Page, J.-B.Ribordy, G.Poppe, A.Allacher, A.Maurhart, O.Länger, T.Peev, M.Zeilinger, A.547A secure communication network with quantum key distribution in a metropolitan area is reported. Six different QKD systems are integrated into a mesh-type network. GHz-clocked QKD links enable us to demonstrate the world-first secure TV conferencing over a distance of 45km. The network includes a commercial QKD product for long-term stable operation, and application interface to secure mobile phones. Detection of an eavesdropper, rerouting into a secure path, and key relay via trusted nodes are demonstrated in this network.Optical Society of AmericaJournal Articleapplication/pdfhttp://hdl.handle.net/2115/47440https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/47440/1/OE19-11_10387-10409.pdf1094-4087Optics Express191110387104092011-05-23enginfo:doi/10.1364/OE.19.010387©2011 Optical Society of Americapublisher