We present a result of side-channel-secure (SCS) quantum key distribution (QKD) under fully realistic conditions. Our result is not only measurement-device independent but also effective with imperfect (and unstable) source devices including imperfect vacuum and imperfect coherent-state source. Applying the virtual mapping idea, we present a general security proof under whatever out-side-lab attack, including whatever side-channel coherent attack. As a byproduct, we also present an improved method for SCS protocols which can raise the key rate by 1-2 orders of magnitude. Using these results, we obtain a non-asymptotic key rate which is instantly useful with full realistic conditions.
@article{arxiv.2305.08148,
title = {Side-channel-secure quantum key distribution},
author = {Cong Jiang and Xiao-Long Hu and Zong-Wen Yu and Xiang-Bin Wang},
journal= {arXiv preprint arXiv:2305.08148},
year = {2023}
}