Unconditional security of practical quantum key distribution

  title={Unconditional security of practical quantum key distribution},
  author={Hisayoshi Inamori and Norbert L{\"u}tkenhaus and Dominic Mayers},
We present a proof of unconditional security of a practical quantum key distribution protocol. It is an extension of a previous result obtained by Mayers [1, 2], which proves unconditional security provided that a perfect single photon source is used. In present days, perfect single photon sources are not available and, therefore, practical implementations use either dim laser pulses or post-selected states from parametric downconversion. Both practical signal types contain multi-photon… CONTINUE READING
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