Security of quantum key distribution with detection-efficiency mismatch in the single-photon case: Tight bounds
arXiv:1810.04663 · doi:10.1103/PhysRevA.99.032308
Abstract
One of the challenges in practical quantum key distribution is dealing with efficiency mismatch between different threshold single-photon detectors. There are known bounds for the secret key rate for the BB84 protocol with detection-efficiency mismatch provided that the eavesdropper sends no more than one photon to the legitimate receiver. Here we improve these bounds and give tight bounds for the secret key rate with a constant detection-efficiency mismatch under the same single-photon assumption. We propose a method based on the analytical minimization of the relative entropy of coherence, which can be used in other problems in quantum key distribution. Also we propose an adaptation of the decoy state method to proof the security in the case of weak coherent pulses on the source side.
arXiv commentv3: decoy state analysis for detection-efficiency mismatch; more detailed explanations; v2: generalization, simplified proof of the theorem, more detailed explanations
References in corpus (29)
- Quantum Cryptography
- The Security of Practical Quantum Key Distribution
- Simple Proof of Security of the BB84 Quantum Key Distribution Protocol
- Quantifying Coherence
- Decoy State Quantum Key Distribution
- Beating the PNS attack in practical quantum cryptography
- Practical Decoy State for Quantum Key Distribution
- Distillation of secret key and entanglement from quantum states
- Practical challenges in quantum key distribution
- Tight Finite-Key Analysis for Quantum Cryptography
- Quantum Hacking: Experimental demonstration of time-shift attack against practical quantum key distribution systems
- Quantum key distribution with realistic states: photon-number statistics in the photon-number splitting attack
- Unambiguous state discrimination in quantum cryptography with weak coherent states
- Numerical approach for unstructured quantum key distribution
- Improved key rate bounds for practical decoy-state quantum key distribution systems
- A largely self-contained and complete security proof for quantum key distribution
- Reliable numerical key rates for quantum key distribution
- A fast and versatile QKD system with hardware key distillation and wavelength multiplexing
- Security loophole in free-space quantum key distribution due to spatial-mode detector-efficiency mismatch
- Symmetric blind information reconciliation for quantum key distribution
- Tomography increases key rates of quantum-key-distribution protocols
- Unification of different views of decoherence and discord
- Squashing model for detectors and applications to quantum key distribution protocols
- Post-processing procedure for industrial quantum key distribution systems
- Detector decoy quantum key distribution
- Error estimation at the information reconciliation stage of quantum key distribution
- Practical issues in decoy-state quantum key distribution based on the central limit theorem
- Symmetric blind information reconciliation and hash-function-based verification for quantum key distribution
- Entanglement verification with detection-efficiency mismatch
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