Secret-Key Distribution Based on Bounded Observability

Jun Muramatsu, Kazuyuki Yoshimura, Peter Davis, Atsushi Uchida, Takahisa Harayama

Research output: Contribution to journalArticle

9 Citations (Scopus)


This paper reviews an approach to secret-key distribution based on the bounded observability (BO) model. First, the information-theoretic framework of secret-key agreement from a correlated random source is reviewed. Next, the BO model is introduced. In the context of this model, the BO condition is presented as a necessary and sufficient condition for the possibility of secret-key distribution. This condition describes limits on the information obtained by observation of a random object, and models the practical difficulty of completely observing random physical phenomena. Finally, an implementation of secret-key distribution based on BO in an optical fiber system is described.

Original languageEnglish
Article number7264973
Pages (from-to)1762-1780
Number of pages19
JournalProceedings of the IEEE
Issue number10
Publication statusPublished - 2015 Oct


  • Bounded observability (BO)
  • correlated randomness in optical devices
  • information-theoretic security
  • secret key agreement
  • secret-key distribution

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    Muramatsu, J., Yoshimura, K., Davis, P., Uchida, A., & Harayama, T. (2015). Secret-Key Distribution Based on Bounded Observability. Proceedings of the IEEE, 103(10), 1762-1780. [7264973].