We establish a security proof of frequency-time coding quantum key distribution (FT-QKD) protocol by showing its connection to the squeezed state quantum key distribution protocol, which has been proven to be unconditionally secure. We also extend the prepare-and-measure FT-QKD protocol to an entanglement based FT-QKD protocol which is more appealing in practice. Furthermore, we propose a correlated frequency measurement scheme of entangled photon pair by using time resolving single photon detector. Simulation results show that the FT-QKD protocol can be implemented with today's technology.
@article{arxiv.1101.5995,
title = {Quantum key distribution based on frequency-time coding: security and feasibility},
author = {Bing Qi},
journal= {arXiv preprint arXiv:1101.5995},
year = {2015}
}