We propose a scheme for quantum key distribution (QKD) in a passive optical network (PON) based on differential phase shift (DPS) coding. A centralized station including all expensive components serves many users, making it suitable for a true multi-user network in a local environment with moderate distances on the order of a few kilometers. The emphasis lies on an asymmetric design for cost effective implementation of network end points.
@article{arxiv.1412.6311,
title = {A Differential Phase Shift Scheme for Quantum Key Distribution in Passive Optical Networks},
author = {Michael Hentschel and Andreas Poppe and Bernhard Schrenk and Momtchil Peev and Edwin Querasser and Roland Lieger},
journal= {arXiv preprint arXiv:1412.6311},
year = {2014}
}