Field test of a practical secure communication network with decoy-state quantum cryptography.
We present a secure network communication system that operated with decoy-state quantum cryptography in a real-world application scenario. The full key exchange and application protocols were performed in real time among three nodes, in which two adjacent nodes were connected by approximate 20 km of commercial telecom optical fiber. The generated quantum keys were immediately employed and demonstrated for communication applications, including unbreakable real-time voice telephone between any two of the three communication nodes, or a broadcast from one node to the other two nodes by using one-time pad encryption.
Chen
Teng-Yun
TY
Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
Liang
Hao
H
Liu
Yang
Y
Cai
Wen-Qi
WQ
Ju
Lei
L
Liu
Wei-Yue
WY
Wang
Jian
J
Yin
Hao
H
Chen
Kai
K
Chen
Zeng-Bing
ZB
Peng
Cheng-Zhi
CZ
Pan
Jian-Wei
JW
D003195:Computer Communication Networks / Q000295:instrumentation*; D016494:Computer Security / Q000295:instrumentation*; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D055100:Optical Fibers; D011789:Quantum Theory; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*