Supported by the Wuhu Government and China Telecommunications Corporation, Wuhu Branch, and National Basic Research Program of China (Grant No. 2006CB921900);National Natural Science Foundation of China (Grant Nos. 60537020, 60621064);Innovation Funds of Chinese Academy of Sciences
A hierarchical metropolitan quantum cryptography network upon the inner-city commercial telecom fiber cables is reported in this paper. The seven-user network contains a four-node backbone net with one node acting as ...