A recently proposed fully passive QKD removes all source modulator side channels. In this work, we combine the fully passive sources with MDI-QKD to remove simultaneously side channels from source modulators and detectors. We show a numerical simulation of the passive MDI-QKD, and we obtain an acceptable key rate while getting much better implementation security, as well as ease of implementation, compared with a recently proposed fully passive TF-QKD, paving the way towards more secure and practical QKD systems. We have proved that a fully passive protocol is compatible with MDI-QKD and we also proposed a novel idea that could potentially improve the sifting efficiency.
@article{arxiv.2309.07673,
title = {Fully Passive Measurement-Device-Independent Quantum Key Distribution},
author = {Jinjie Li and Wenyuan Wang and Hoi-Kwong Lo},
journal= {arXiv preprint arXiv:2309.07673},
year = {2023}
}