Generalized PPM-based BB84 QKD protocol

Yequn Zhang, Ivan B. Djordjevic

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

5 Scopus citations


In this paper, we consider quantum key distribution (QKD) using pulse-position modulation (PPM) and propose the PPM-based BB84 QKD protocol. With the adoption of PPM, the efficiency of utilizing weak laser pulses can be improved and hence the key rate. We first analyse the potential of using PPM from the perspective of raw key rate. We then provide detailed description of the proposed protocol, the encoding rule of which has to be specifically designed in order to be secure. Lastly, we consider the intercept-resend and photon-number splitting attacks and analyse the secret key rate of the proposed QKD protocol. Our analysis shows that in high-loss channel, the proposed PPM-based BB84 protocol can achieve higher secret key rates compared to the conventional BB84 protocol.

Original languageEnglish (US)
Title of host publicationICTON 2014 - 16th International Conference on Transparent Optical Networks
PublisherIEEE Computer Society
ISBN (Print)9781479956005
StatePublished - 2014
Event16th International Conference on Transparent Optical Networks, ICTON 2014 - Graz, Austria
Duration: Jul 6 2014Jul 10 2014

Publication series

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


Other16th International Conference on Transparent Optical Networks, ICTON 2014


  • Quantum key distribution
  • pulse-position modulation
  • secret key rate
  • weak laser pulse

ASJC Scopus subject areas

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


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