Gigahertz decoy quantum key distribution with 1 Mbit/s secure key rate
  We report the first gigahertz clocked decoy-protocol quantum key distribution (QKD). Record key rates have been achieved thanks to the use of self-differencing InGaAs avalanche photodiodes designed specifically for high speed single photon detection. The system is characterized with a secure key rate of 1.02 Mbit/s for a fiber distance of 20 km and 10.1 kbit/s for 100 km. As the present advance relies upon compact non-cryogenic detectors, it opens the door towards practical and low cost QKD systems to secure broadband communication in future. 
A. R. Dixon, Z. L. Yuan, J. F. Dynes, A. W. Sharpe and A. J. Shields