Loophole-free plug-and-play quantum key distribution

Abstract

Robust, simple, and flexible quantum key distribution (QKD) is vital for realising practical applications of this technique. Contrary to typical phase-coded QKD schemes, the plug-and-play QKD design requires only one arm-length-insensitive interferometer without active feedback, in which the noise is automatically compensated by the two-way structure. However, there are certain possible loopholes in the typical plug-and-play designs, which require consideration and strict monitoring. This study proposes a loophole-free plug-and-play QKD scheme with two-way protocol and presents an experimental demonstration of said scheme. The security is analysed under a collective attack scenario assisted by the decoy state method. The scheme was implemented in a 50.4 km commercial fibre without active feedback. The system showed highly robust performance with an ultra-low error rate and maintained an ultra-high visibility of 0.9947+/-0.0002 through significant environmental changes over 24 hours.

References in corpus (34)

• Quantum Cryptography
• Quantum cryptography: Public key distribution and coin tossing
• The Security of Practical Quantum Key Distribution
• Decoy State Quantum Key Distribution
• Satellite-to-ground quantum key distribution
• Quantum Key Distribution with High Loss: Toward Global Secure Communication
• Theoretical efficient high capacity Quantum Key Distribution Scheme
• Beating the PNS attack in practical quantum cryptography
• Secure Direct Communication with a Quantum One-Time-Pad
• Field test of quantum key distribution in the Tokyo QKD Network
• Deterministic Secure Direct Communication Using Entanglement
• Secure direct communication using entanglement
• Distillation of secret key and entanglement from quantum states
• Secure quantum key distribution over 421 km of optical fiber
• Pulsed energy-time entangled twin-photon source for quantum communication
• Tight Finite-Key Analysis for Quantum Cryptography
• Trojan Horse attacks on Quantum Key Distribution systems
• Secure Deterministic Communication Without Entanglement
• ``Plug and play'' systems for quantum cryptography
• Experimental demonstration of phase-remapping attack in a practical quantum key distribution system
• Phase-Remapping Attack in Practical Quantum Key Distribution Systems
• Practical issues in quantum-key-distribution post-processing
• Practical security bounds against the Trojan-horse attack in quantum key distribution
• Distinguishability of States and von Neumann Entropy
• Security of two-way quantum key distribution
• Passive faraday mirror attack in practical two-way quantum key distribution system
• Unconditional security proof of a deterministic quantum key distribution with a two-way quantum channel
• Experimental quantum key distribution with finite-key security analysis for noisy channels
• Partially random phase attack to the practical two-way quantum-key-distribution system
• Security Analysis of an Untrusted Source for Quantum Key Distribution: Passive Approach
• Passive scheme with a photon-number-resolving detector for monitoring the untrusted source in a plug-and-play quantum-key-distribution system
• Practical security analysis of two-way quantum key distribution protocols based on non-orthogonal states
• Finite key size analysis of two-way quantum cryptography
• Measurement-induced quantum entanglement recovery

Cited by in corpus (4)

• The Evolution of Quantum Secure Direct Communication: On the Road to the Qinternet
• Device-independent quantum secret sharing with noise preprocessing and postselection
• Towards Global Quantum Key Distribution
• Nontraditional Deterministic Remote State Preparation Using a Non-Maximally Entangled Channel without Additional Quantum Resources