Asynchronous quantum key distribution on a relay network

Stephen M. Barnett, Simon J. D. Phoenix

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We show how quantum key distribution on a multi-user, multi-path, network can be used to establish a key between any two end-users in an asynchronous fashion using the technique of bit-transport. By a suitable adaptation of our previous secret-sharing scheme we show that an attacker has to compromise all of the intermediate relays on the network in order to obtain the key. Thus, two end-users can establish a secret key provided they trust at least one of the network relays.

Original languageEnglish
Pages (from-to)1349-1354
Number of pages6
JournalJournal of Modern Optics
Issue number15
Early online date31 Aug 2012
Publication statusPublished - 2012


  • quantum key distribution
  • secret sharing
  • optical networks

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