Effect of light injection on the security of practical quantum key distribution
arXiv:2303.14683 · doi:10.1103/PhysRevApplied.20.044013
Abstract
Quantum key distribution (QKD) based on the fundamental laws of quantum physics can allow the distribution of secure keys between distant users. However, the imperfections in realistic devices may lead to potential security risks, which must be accurately characterized and considered in practical security analysis. High-speed optical modulators, being as one of the core components of practical QKD systems, can be used to prepare the required quantum states. Here, we find that optical modulators based on LiNbO3, including phase modulators and intensity modulators, are vulnerable to photorefractive effect caused by external light injection. By changing the power of external light, eavesdroppers can control the intensities of the prepared states, posing a potential threat to the security of QKD. We have experimentally demonstrated the influence of light injection on LiNbO3-based optical modulators and analyzed the security risks caused by the potential green light injection attack, along with the corresponding countermeasures.
References in corpus (32)
- Decoy State Quantum Key Distribution
- Measurement-device-independent quantum key distribution
- Secure quantum key distribution with realistic devices
- Beating the PNS attack in practical quantum cryptography
- Overcoming the rate-distance barrier of quantum key distribution without using quantum repeaters
- Free-Space distribution of entanglement and single photons over 144 km
- Practical Decoy State for Quantum Key Distribution
- Secure quantum key distribution over 421 km of optical fiber
- Trojan Horse attacks on Quantum Key Distribution systems
- Experimental measurement-device-independent quantum key distribution
- Experimental Long-Distance Decoy-State Quantum Key Distribution Based On Polarization Encoding
- Experimental Twin-Field Quantum Key Distribution Over 1000 km Fiber Distance
- Long distance decoy state quantum key distribution in optical fiber
- Experimental demonstration of phase-remapping attack in a practical quantum key distribution system
- Practical free-space quantum key distribution over 1 km
- Experimental quantum key distribution beyond the repeaterless secret key capacity
- Device calibration impacts security of quantum key distribution
- Risk analysis of Trojan-horse attacks on practical quantum key distribution systems
- Gaussian-modulated coherent-state measurement-device-independent quantum key distribution
- Laser seeding attack in quantum key distribution
- Patterning-effect-free intensity modulator for secure decoy-state quantum key distribution
- Continuous operation of a one-way quantum key distribution system over installed telecom fibre
- Laser damage attack against optical attenuators in quantum key distribution
- All-fiber self-compensating polarization encoder for Quantum Key Distribution
- Effect of source tampering in the security of quantum cryptography
- Proof-of-Concept of Real-World Quantum Key Distribution with Quantum Frames
- Protecting fiber-optic quantum key distribution sources against light-injection attacks
- Hacking Quantum Key Distribution via Injection Locking
- Induced-photorefractive attack against Quantum Key Distribution
- Hacking single-photon avalanche detector in quantum key distribution via pulse illumination
- Phase-coding quantum-key-distribution system based on Sagnac-Mach-Zehnder interferometers
- Quantum key distribution component loopholes in 1500-2100 nm range perspective for Trojan-horse attacks