Fully-Passive Quantum Key Distribution
arXiv:2207.05916 · doi:10.1103/PhysRevLett.130.220801
Abstract
Passive implementations of quantum key distribution (QKD) sources are highly desirable as they eliminate side-channels that active modulators might introduce. Up till now, passive decoy-state and passive encoding BB84 schemes have both been proposed. Nonetheless, passive decoy-state generation and passive encoding have never been simultaneously implemented with linear optical elements before, which greatly limits the practicality of such passive QKD schemes. In this work, we overcome this limitation and propose a fully-passive QKD source with linear optics that eliminates active modulators for both decoy-state choice and encoding. This allows for highly practical QKD systems that avoid side-channels from the source modulators. The passive source we propose (combined with the decoy-state analysis) can create any arbitrary state on a qubit system and is protocol-independent. That is, it can be used for various protocols such as BB84, reference-frame-independent QKD, or the six-state protocol. It can also in principle be combined with e.g. measurement-device-independent QKD, to build a system without side-channels in either detectors or modulators.
References in corpus (18)
- Device-independent security of quantum cryptography against collective attacks
- Hacking commercial quantum cryptography systems by tailored bright illumination
- Distillation of secret key and entanglement from quantum states
- Measurement device independent quantum key distribution over 404 km optical fibre
- Device-independent quantum key distribution secure against collective attacks
- Experimental device-independent quantum key distribution between distant users
- Protocol choice and parameter optimization in decoy-state measurement-device-independent quantum key distribution
- Photonic verification of device-independent quantum key distribution against collective attacks
- Robust random number generation using steady-state emission of gain-switched laser diodes
- Gigahertz measurement-device-independent quantum key distribution using directly modulated lasers
- Proof-of-principle experiment of reference-frame-independent quantum key distribution with phase coding
- Passive state preparation in the Gaussian-modulated coherent states quantum key distribution
- Interference of short optical pulses from independent gain-switched laser diodes for quantum secure communications
- Improved Finite-Key Security Analysis of Quantum Key Distribution Against Trojan-Horse Attacks
- Passive sources for the Bennett-Brassard 1984 quantum key distribution protocol with practical signals
- A fully passive transmitter for decoy-state quantum key distribution
- Measurement device-independent quantum key distribution with passive, time-dependent source side-channels
- Loss-tolerant quantum key distribution with a twist
Cited by in corpus (12)
- A fully passive transmitter for decoy-state quantum key distribution
- Towards Global Quantum Key Distribution
- Security of the decoy-state BB84 protocol with imperfect state preparation
- Security framework for quantum key distribution with imperfect sources
- Quantum communications feasibility tests over a UK-Ireland 224-km undersea link
- Phase-Matching Quantum Key Distribution without Intensity Modulation
- Differential-phase-shift QKD with practical Mach-Zehnder interferometer
- Optical-pumping attack on a quantum key distribution laser source
- Security of the BB84 protocol with passive biased basis choice by the receiver
- Finite-key security analysis of the decoy-state BB84 QKD with passive measurement
- Phase-correlation-free quantum key distribution source operating at gigahertz rates
- Source-independent quantum key distribution without pre-sending entanglement