Foiling zero-error attacks against coherent-one-way quantum key distribution
arXiv:2108.12393 · doi:10.1103/PhysRevA.104.062417
Abstract
To protect practical quantum key distribution (QKD) against photon-number-splitting attacks, one could measure the coherence of the received signals. One prominent example that follows this approach is coherent-one-way (COW) QKD, which is commercially available. Surprisingly, however, it has been shown very recently that its secret key rate scales quadratically with the channel transmittance, and, thus, this scheme is unsuitable for long-distance transmission. This result was derived by using a zero-error attack, which prevents the distribution of a secure key without introducing any error. Here, we study various countermeasures to foil zero-error attacks against COW-QKD. They require to either monitor some additional available detection statistics, or to increase the number of quantum states emitted. We obtain asymptotic upper security bounds on the secret key rate that scale close to linear with the channel transmittance, thus suggesting the effectiveness of the countermeasures to boost the performance of this protocol.
arXiv comment27 pages, 18 figures
References in corpus (44)
- Decoy State Quantum Key Distribution
- Measurement-device-independent quantum key distribution
- Advances in Quantum Cryptography
- Satellite-to-ground quantum key distribution
- Quantum Key Distribution with High Loss: Toward Global Secure Communication
- Device-independent security of quantum cryptography against collective attacks
- Secure quantum key distribution with realistic devices
- Beating the PNS attack in practical quantum cryptography
- Fundamental Limits of Repeaterless Quantum Communications
- General Benchmarks for Quantum Repeaters
- Secure Quantum Key Distribution
- Overcoming the rate-distance barrier of quantum key distribution without using quantum repeaters
- Field test of quantum key distribution in the Tokyo QKD Network
- Quantum key distribution over 40 dB channel loss using superconducting single photon detectors
- Secure quantum key distribution over 421 km of optical fiber
- Provably Secure and Practical Quantum Key Distribution over 307 km of Optical Fibre
- Fundamental rate-loss tradeoff for optical quantum key distribution
- Experimental measurement-device-independent quantum key distribution
- Unambiguous Discrimination Between Linearly-Independent Quantum States
- Sending or not sending: twin-field quantum key distribution with large misalignment error
- Experimental Long-Distance Decoy-State Quantum Key Distribution Based On Polarization Encoding
- Experimental Quantum Key Distribution with Decoy States
- Long term performance of the SwissQuantum quantum key distribution network in a field environment
- Long distance decoy state quantum key distribution in optical fiber
- Real-world two-photon interference and proof-of-principle quantum key distribution immune to detector attacks
- Entanglement as precondition for secure quantum key distribution
- Fast and simple one-way Quantum Key Distribution
- Satellite-to-ground quantum communication using a 50-kg-class micro-satellite
- High rate, long-distance quantum key distribution over 250km of ultra low loss fibres
- Gigahertz decoy quantum key distribution with 1 Mbit/s secure key rate
- Quantum key distribution with entangled photon sources
- Optimum Unambiguous Discrimination Between Linearly Independent Symmetric States
- Proof-of-principle demonstration of measurement-device-independent quantum key distribution using polarization qubits
- 600 km repeater-like quantum communications with dual-band stabilisation
- Practical Quantum Key Distribution with Polarization-Entangled Photons
- Unconditional security of coherent-state quantum key distribution with strong phase-reference pulse
- A Semidefinite Programming Approach to Optimal Unambiguous Discrimination of Quantum States
- Fully automated entanglement-based quantum cryptography system for telecom fiber networks
- Security of distributed-phase-reference quantum key distribution
- Towards practical and fast Quantum Cryptography
- Unconditional security of the Bennett 1992 quantum key-distribution scheme with strong reference pulse
- Upper security bounds for coherent-one-way quantum key distribution
- Quantum soft filtering for the improved security analysis of the coherent one-way quantum-key-distribution protocol
- Zero-error attack against coherent-one-way quantum key distribution