Covert communications-based information reconciliation for quantum key distribution protocols

John Gariano, Ivan B. Djordjevic

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The rate at which a secure key can be generated in a quantum key distribution (QKD) protocol is limited by the channel loss and the quantum bit-error rate (QBER). Increases to the QBER can stem from detector noise, channel noise, or the presence of an eavesdropper, Eve. Eve is capable of obtaining information of the unsecure key by performing an attack on the quantum channel or by listening to all discussion performed via a noiseless public channel. Conventionally a QKD protocol will perform the information reconciliation over the authenticated public channel, revealing the parity bits used to correct for any quantum bit errors. In this invited paper, the possibility of limiting the information revealed to Eve during the information reconciliation is considered. Using a covert communication channel for the transmission of the parity bits, secure key rates are possible at much higher QBERs. This is demonstrated through the simulation of a polarization based QKD system implementing the BB84 protocol, showing significant improvement of the SKRs over the conventional QKD protocols.

Original languageEnglish (US)
Title of host publication21st International Conference on Transparent Optical Networks, ICTON 2019
PublisherIEEE Computer Society
ISBN (Electronic)9781728127798
DOIs
StatePublished - Jul 2019
Event21st International Conference on Transparent Optical Networks, ICTON 2019 - Angers, France
Duration: Jul 9 2019Jul 13 2019

Publication series

NameInternational Conference on Transparent Optical Networks
Volume2019-July
ISSN (Electronic)2162-7339

Conference

Conference21st International Conference on Transparent Optical Networks, ICTON 2019
CountryFrance
CityAngers
Period7/9/197/13/19

Keywords

  • Covert communication
  • Polarization entanglement
  • QKD

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Gariano, J., & Djordjevic, I. B. (2019). Covert communications-based information reconciliation for quantum key distribution protocols. In 21st International Conference on Transparent Optical Networks, ICTON 2019 [8839991] (International Conference on Transparent Optical Networks; Vol. 2019-July). IEEE Computer Society. https://doi.org/10.1109/ICTON.2019.8839991