Secrecy capacity against adaptive eavesdroppers in a random wireless network using friendly jammers and protected zone

J. E. Giti, A. Sakzad, B. Srinivasan, J. Kamruzzaman, R. Gaire

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)


In this paper, we consider deceptive friendly jammers in a half-duplex random wireless network against a group of adaptive eavesdroppers. The destinations, eavesdroppers and friendly jammers are distributed according to homogeneous Poisson point process (HPPP). To the best of our knowledge, we are the first to study such a system model. As we may combine hostile jamming and passive eavesdropping, the secrecy of legitimate communication might be compromised. To combat this and improve secrecy of transmission, a group of friendly jammers thus transmit a source-like signal to deceive the eavesdroppers and try to force them to be passive listeners as much as possible. We derive the secrecy capacity for this scenario. The secrecy performance is evaluated for different parameters and with a secrecy protected zone surrounding the source. Performance evaluation through illustrative numerical results demonstrates that the friendly jammers can enhance the secrecy of a random wireless network. The advantages of friendly jammers are particularly prominent if the secrecy protected zone is very small and/or the node intensity of the destinations is low. The results show that the friendly jammers can restore the secrecy in a hostile environment if sufficient friendly jammers (e.g., 0.01 km−2 for the provided system model) are hired.

Original languageEnglish
Article number102698
Number of pages11
JournalJournal of Network and Computer Applications
Publication statusPublished - 1 Sep 2020


  • Adaptive eavesdropper
  • Friendly jammer
  • HPPP network
  • Secrecy capacity

Cite this