Field test of quantum key distribution in the Tokyo QKD Network
M. Sasaki, Mikio Fujiwara, Hirokazu Ishizuka, Werner Klaus, Kentaro Wakui, Masahiro Takeoka, Shigehito Miki, T. Yamashita, Zhixin Wang, Akihiro Tanaka, K. Yoshino, Yasusada Nambu, Satoshi Takahashi, A. Tajima, Akihisa Tomita, T. Domeki, Tetsuya Hasegawa, Y. Sakai, Hiroshi Kobayashi, T. Asai · Optics Express · 2011
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.