Quantum cryptography (QC) can provide unconditional secure communication between two authorized parties based on the basic principles of quantum mechanics. However, imperfect practical conditions limit its transmission distance and communication speed. Here we implemented the differential phase shift (DPS) quantum key distribution (QKD) with up-conversion assisted hybrid photon detector (HPD) and achieved 1.3 M bits per second secure key rate over a 10-km fiber, which is tolerant against the photon number splitting (PNS) attack, general collective attacks on individual photons, and any other known sequential unambiguous state discrimination (USD) attacks.
@article{arxiv.0809.4018,
title = {Megabits secure key rate quantum key distribution},
author = {Q. Zhang and H. Takesue and T. Honjo and K. Wen and T. Hirohata and M. Suyama and Y. Takiguchi and H. Kamada and Y. Tokura and O. Tadanaga and Y. Nishida and M. Asobe and Y. Yamamoto},
journal= {arXiv preprint arXiv:0809.4018},
year = {2015}
}