Decoy-state quantum key distribution with more than three types of photon intensity pulses

  title={Decoy-state quantum key distribution with more than three types of photon intensity pulses},
  author={Hoi Fung Chau},
  journal={Physical Review A},
  • H. Chau
  • Published 3 December 2017
  • Physics
  • Physical Review A
Decoy state method closes source security loophole in quantum key distribution (QKD) using laser source. In this method, accurate estimates of the detection rates of vacuum and single photon events plus the error rate of single photon events are needed to give a good enough lower bound of the secret key rate. Nonetheless, the current estimation method for these detection and error rates, which uses three types of photon intensities, is accurate up to about 1% relative error. Here I report an… 
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