Quantum noise protected data encryption in a WDM network

@article{Liang2005QuantumNP,
  title={Quantum noise protected data encryption in a WDM network},
  author={Chuang Liang and G. S. Kanter and Eric Corndorf and Prem Kumar},
  journal={IEEE Photonics Technology Letters},
  year={2005},
  volume={17},
  pages={1573-1575}
}
We demonstrate fully streaming optical data encryption over a 250-km-long fiber-optic wavelength-division-multiplexing (WDM) line at OC-12 data rate. Our scheme, based on the fundamental and irreducible quantum noise of laser light, allows for optical amplification and is shown to be compatible with today's high-speed WDM telecommunications infrastructure. 
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