A fast and versatile QKD system with hardware key distillation and wavelength multiplexing

Abstract

We present a 625 MHz clocked coherent one-way quantum key distribution (QKD) system which continuously distributes secret keys over an optical fibre link. To support high secret key rates, we implemented a fast hardware key distillation engine which allows for key distillation rates up to 4 Mbps in real time. The system employs wavelength multiplexing in order to run over only a single optical fibre and is compactly integrated in 19-inch 2U racks. We optimized the system considering a security analysis that respects finite-key-size effects, authentication costs, and system errors. Using fast gated InGaAs single photon detectors, we reliably distribute secret keys with rates up to 140 kbps and over 25 km of optical fibre, for a security parameter of 4E-9.

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Cited by in corpus (53)

• Advances in Quantum Cryptography
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• Provably Secure and Practical Quantum Key Distribution over 307 km of Optical Fibre
• 10~Mb/s quantum key distribution
• Trojan-horse attacks threaten the security of practical quantum cryptography
• Long distance co-propagation of quantum key distribution and terabit classical optical data channels
• Key Reconciliation with Low-Density Parity-Check Codes for Long-Distance Quantum Cryptography
• Continuous-variable measurement-device-independent quantum key distribution: Composable security against coherent attacks
• Free-running InGaAs single photon detector with 1 dark count per second at 10% efficiency
• Fast and simple qubit-based synchronization for quantum key distribution
• Creation of backdoors in quantum communications via laser damage
• A scalable network for simultaneous pairwise quantum key distribution via entanglement-based time-bin coding
• Key recycling in authentication
• Symmetric blind information reconciliation for quantum key distribution
• Parameter estimation with almost no public communication for continuous-variable quantum key distribution
• Quantum random number generation for 1.25 GHz quantum key distribution systems
• Robust and stable delay interferometers with application to $d$-dimensional time-frequency quantum key distribution
• Lightweight authentication for quantum key distribution
• Fundamental Finite Key Limits for One-Way Information Reconciliation in Quantum Key Distribution
• Post-processing procedure for industrial quantum key distribution systems
• Robustness of quantum key distribution with discrete and continuous variables to channel noise
• Versatile and concurrent FPGA-based architecture for practical quantum communication systems
• Detector-Device-Independent Quantum Key Distribution
• Simple security proof of coherent-one-way quantum key distribution
• Preparing a commercial quantum key distribution system for certification against implementation loopholes
• Security of quantum key distribution with detection-efficiency mismatch in the single-photon case: Tight bounds
• Best-practice criteria for practical security of self-differencing avalanche photodiode detectors in quantum key distribution
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• Quantum Communication using Code Division Multiple Access Network
• High-dimensional coherent one-way quantum key distribution
• Practical issues in decoy-state quantum key distribution based on the central limit theorem
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• Detector-device-independent QKD: security analysis and fast implementation
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• Controlled entanglement source for quantum cryptography
• Deploying hybrid quantum-secured infrastructure for applications: When quantum and post-quantum can work together
• Wavelength- and time-division multiplexing via pump current variation of a pulsed semiconductor laser -- a method of synchronization for quantum key distribution
• Feasibility study towards comparison of the g^(2)(0) measurement in the visible range
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• What The Trace Distance Security Criterion in Quantum Key Distribution Does And Does Not Guarantee
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• Photonic quantum information with time-bins: Principles and applications
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