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

Abstract

Abstract: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.

Modeling, Simulation, and Performance Analysis of Decoy State Enabled Quantum Key Distribution Systems

“…As one of the most well documented decoy state protocol implementations and a major milestone in the world's largest QKD network, Chen and coworkers' work lends itself well to detailed analysis [55]. The protocol's configuration is provided in Table 6.…”

“…During normal operations, the optimized configuration results, shown in green, demonstrate at least one decoy state Figure 6. Simulation results show the optimized decoy state protocol for detecting PNS attacks based on the fielded QKD system [55]. The inlay details the expected dark count rate complete with outliers to illustrate the modeled noise over the QKD communication channel.…”

A Real-Time Design Based on FPGA for Expeditious Error Reconciliation in QKD System

“…The qubit transmission rate is 20MHz. According to our experiment environment, the average photon number is set to 0.6:0.2:0 [17], [18] which represents signal state, decoy state and vacuum state respectively, and the corresponding frequency ratio is 6:1:1. The QKD system used in the test is depicted in Fig.6.…”

Towards a Key Consuming Detection in QKD-VoIP Systems

“…In 2005, IDQuantique and MagiQ companies have launched second generation products of commercial QKD systems [3,4]. The European project SECOQC demonstrated the world's first commercial QKD network for about 30 days in 2008 [5].The QKD network with security audio application was established by USTC in 2009 [6]. Nowadays, researchers have focused on improving the performance of QKD systems and integrating QKD technologies into practical security communication systems.…”