Security against eavesdropping in quantum cryptography

Norbert Lütkenhaus, Stephen M. Barnett

Research output: Contribution to journalArticlepeer-review

104 Citations (Scopus)
10 Downloads (Pure)


A sharp estimate is given for the amount of Shannon information and expected collision probability. This estimate is valid for all eavesdropping strategies described by a generalized measurement and restricted to the Hilbert space of the one-photon state. The optimal generalized measurement is explicitly given.
Original languageEnglish
Pages (from-to)97-111
Number of pages14
JournalPhysical Review A
Issue number1
Publication statusPublished - Jul 1996


  • physics
  • quantum
  • measurement
  • collision probability
  • eavesdropping
  • security
  • photon


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