Concurrent Two-Party Key Exchange with Forward Unlinkability in Internet of Drones

Jae Yeol Jeong, Hyung Woo Kang, Ik Rae Jeong

Research output: Contribution to journalArticlepeer-review


By the drone capturing attacks, the adversaries can extract the long-Term secret keys stored in the drones. Therefore, it is necessary to consider forward secrecy and forward unlinkability to minimize the damage by the drone capturing attacks. Forward secrecy protects the secrecy of the past sessions between users and drones, and forward unlinkability guarantees the strong anonymity of users and drones participated in the past sessions, even when the long-Term secret keys are revealed to the attackers via the drone capturing attacks. In 2022 Jeong et el. suggested a three-party key agreement scheme for internet of drones which provides forward secrecy and forward unlikability. However, their scheme has some shortcomings. Especially, in their scheme a drone (or a user) cannot run concurrently multiple key exchange sessions with multiple users (or drones). And their scheme provides only weak forward secrecy, not standard forward secrecy. In this paper, we propose a key exchange protocol resolving all the shortcomings of the Jeong et al.'s scheme. That is, our key exchange protocol provides the standard forward secrecy and forward unlinkability. And a drone can run concurrently multiple sessions with users without communication with the server. We also suggest a formal model for the forward unlinkability, and prove the forward unlinkability of our scheme in the formal model.

Original languageEnglish
Pages (from-to)77250-77256
Number of pages7
JournalIEEE Access
Publication statusPublished - 2024

Bibliographical note

Publisher Copyright:
© 2013 IEEE.


  • Internet of drones
  • anonymity
  • forward secrecy
  • forward unlinkability
  • key agreement

ASJC Scopus subject areas

  • General Engineering
  • General Computer Science
  • General Materials Science


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