Field test of quantum key distribution in the Tokyo QKD Network

Author(s): A. Zeilinger, A. J. Shields, Z. L. Yuan, A. W. Sharpe, A. R. Dixon, J. F. Dynes, Y. Tokura, H. Takesue, K. Tamaki, T. Honjo, S. Uchikoga, M. Legré, S. Robyr, M. Peev, T. Länger, O. Maurhart, A. Allacher, A. Poppe, G. Ribordy, J. B. Page, L. Monat, P. Trinkler, M. Matsui, T. Tsurumaru, A. Tanaka, Z. Wang, T. Yamashita, S. Miki, M. Takeoka, K. Wakui, W. Klaus, H. Ishizuka, M. Fujiwara, K. Yoshino, Y. Nambu, S. Takahashi, T. Tokura, K. Shimizu, T. Asai, H. Kobayashi, Y. Sakai, T. Hasegawa, T. Domeki, A. Tomita, A. Tajima, M. Sasaki

Journal: Optics Express

Volume: 19

Page(s): 10387–10409

Year: 2011

DOI Number: org/10.1364/OE.19.010387

Link: Link to publication


A 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.


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