Practical long-distance quantum key distribution system using decoy levels

Abstract

Quantum key distribution (QKD) has the potential for widespread real-world applications. To date no secure long-distance experiment has demonstrated the truly practical operation needed to move QKD from the laboratory to the real world due largely to limitations in synchronization and poor detector performance. Here we report results obtained using a fully automated, robust QKD system based on the Bennett Brassard 1984 protocol (BB84) with low-noise superconducting nanowire single-photon detectors (SNSPDs) and decoy levels. Secret key is produced with unconditional security over a record 144.3 km of optical fibre, an increase of more than a factor of five compared to the previous record for unconditionally secure key generation in a practical QKD system.

9 pages

References in corpus (15)

• Decoy State Quantum Key Distribution
• Quantum Key Distribution with High Loss: Toward Global Secure Communication
• Beating the PNS attack in practical quantum cryptography
• Security Aspects of Practical Quantum Cryptography
• Quantum cryptography protocols robust against photon number splitting attacks for weak laser pulses implementations
• Quantum key distribution over 40 dB channel loss using superconducting single photon detectors
• Experimental Long-Distance Decoy-State Quantum Key Distribution Based On Polarization Encoding
• Experimental Quantum Key Distribution with Decoy States
• Long distance decoy state quantum key distribution in optical fiber
• Gigahertz decoy quantum key distribution with 1 Mbit/s secure key rate
• Single photon source characterization with a superconducting single photon detector
• Breaking a quantum key distribution system through a timing side channel
• On the performance of two protocols: SARG04 and BB84
• Experimental Decoy Quantum Key Distribution Up To 130KM Fiber
• Practical quantum key distribution over 60 hours at an optical fiber distance of 20km using weak and vacuum decoy pulses for enhanced security

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• The Security of Practical Quantum Key Distribution
• Measurement-device-independent quantum key distribution
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• Superconducting nanowire single-photon detectors: physics and applications
• Experimental demonstration of long-distance continuous-variable quantum key distribution
• Provably Secure and Practical Quantum Key Distribution over 307 km of Optical Fibre
• Concise Security Bounds for Practical Decoy-State Quantum Key Distribution
• Distributing Secret Keys with Quantum Continuous Variables: Principle, Security and Implementations
• High rate, long-distance quantum key distribution over 250km of ultra low loss fibres
• Superconducting Nanowire Single-Photon Detectors for Quantum Information
• 200km Decoy-state quantum key distribution with photon polarization
• Efficient decoy-state quantum key distribution with quantified security
• Long-distance quantum key distribution secure against coherent attacks
• Continuous-variable quantum key distribution system: past, present, and future
• Satellite-Based Continuous-Variable Quantum Communications: State-of-the-Art and a Predictive Outlook
• Practical aspects of measurement-device-independent quantum key distribution
• Continuous operation of high bit rate quantum key distribution
• Controlling a superconducting nanowire single-photon detector using tailored bright illumination
• Superlinear threshold detectors in quantum cryptography
• Photonic Quantum Networks formed from NV- Centers
• Measurement-device-independent quantum cryptography
• Long distance measurement-device-independent quantum key distribution with entangled photon sources
• Experimental quantum key distribution with finite-key security analysis for noisy channels
• Quantum key distribution with quantum walks
• Einstein-Podolsky-Rosen steering in Gaussian weighted graph states
• Optimised quantum hacking of superconducting nanowire single-photon detectors
• Experimental quantum cryptography scheme based on orthogonal states
• Practical decoy-state method for twin-field quantum key distribution
• Security bounds for efficient decoy-state quantum key distribution
• Secure and efficient synchronization scheme for quantum key distribution
• Security of Decoy-State Protocols for General Photon-Number-Splitting Attacks
• Efficient Phase-Encoding Quantum Key Generation with Narrow-Band Single Photons
• A passive transmitter for quantum key distribution with coherent light
• Photocounting statistics of superconducting nanowire single-photon detectors
• Loss tolerant device-independent quantum key distribution: a proof of principle
• Studies on the readability and on the detection rate in a Mach-Zehnder interferometer-based implementation for high-rate, long-distance QKD protocols
• Privacy Enhanced QKD Networks: Zero Trust Relay Architecture based on Homomorphic Encryption