Field test of a practical secure communication network with decoy-state quantum cryptography

Details Field test of a practical secure communication network with decoy-state quantum cryptography Field test of a practical secure communication network with decoy-state quantum cryptography

2008-10-07

arxiv.org/abs/0810.1264v4

Opt. Express 17, 6540 (2009)

Physics

Quantum Physics

10 pages, 2 figures, 2 tables, typos corrected

Scientific paper

10.1364/OE.17.006540

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.

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