Modern communication strives towards provably secure systems which can be widely deployed. Quantum key distribution provides a methodology to verify the integrity and security of a key exchange based on physical laws. However, physical systems often fall short of theoretical models, meaning they can be compromised through uncharacterized side-channels. The complexity of detection means that the measurement system is a vulnerable target for an adversary. Here, we present secure key exchange up to 200 km while removing all side-channels from the measurement system. We use mass-manufacturable, monolithically integrated transmitters that represent an accessible, quantum-ready communication platform. This work demonstrates a network topology that allows secure equipment sharing which is accessible with a cost-effective transmitter, significantly reducing the barrier for widespread uptake of quantum-secured communication.
@article{arxiv.1908.08745,
title = {Chip-based measurement-device-independent quantum key distribution},
author = {Henry Semenenko and Philip Sibson and Andy Hart and Mark G. Thompson and John G. Rarity and Chris Erven},
journal= {arXiv preprint arXiv:1908.08745},
year = {2020}
}