A real-time QKD system based on FPGA

Abstract

A real-time Quantum Key Distribution System is developed in this paper. In the system, based on the feature of Field Programmable Gate Array (FPGA), secure key extraction control and algorithm have been optimally designed to perform sifting, error correction and privacy amplification altogether in real-time. In the QKD experiment information synchronization mechanism and high-speed classic data channel are designed to ensure the steady operation of the system. Decoy state and synchronous laser light source are used in the system, while the length of optical fiber between Alice and Bob is 20 km. With photons repetition frequency of 20 MHz, the final key rate could reach 17 kbps. Smooth and robust operation is verified with 6-hour continuous test and associated with encrypted voice communication test.

7 pages, 14 figures

References in corpus (2)

• Field test of a practical secure communication network with decoy-state quantum cryptography
• A real-time design based on FPGA for Expeditious Error Reconciliation in QKD system

Cited by in corpus (9)

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• Versatile and concurrent FPGA-based architecture for practical quantum communication systems
• Countermeasure against blinding attacks on low-noise detectors with background noise cancellation scheme
• Topological optimization of hybrid quantum key distribution networks
• An Overview of the State of the Art for Practical Quantum Key Distribution
• Power-consumption Backdoor in Quantum Key Distribution
• High-speed Implementation of FFT-based Privacy Amplification on FPGA in Quantum Key Distribution
• Large-scale and High-speed Privacy Amplification for FPGA-based Quantum Key Distribution
• Efficient Bit Sifting Scheme of Post-processing in Quantum Key Distribution