A DoS and fault-tolerant authentication protocol for group communications in ad hoc networks

Yixin Jiang, Chuang Lin, Minghui Shi, Xuemin (Sherman) Shen*, Xiaowen CHU

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

6 Citations (Scopus)


In this paper, a novel authentication protocol is proposed, which satisfies both security and reliability requirements for group communications in ad hoc networks. The security features include identity anonymity and location intracability, periodic one-way session key and pseudonym identity refreshment with implicit authentication, dynamic joining and leaving an in-progress communication session, and data encryption. The reliability features include efficient Denial of Service tolerance for broadcasting refreshment messages, fault-tolerance for recovering lost refreshment messages, robustness for resisting the clock skews among member nodes and seamless key switch without disrupting ongoing data transmissions. The performance and security analysis show that the communication and computation overhead of the proposed protocol is similar to the existing one, while the security can be enhanced significantly. The simulation results demonstrate the robustness of the proposed protocol under severe Denial of Service attack and poor wireless channel quality.

Original languageEnglish
Pages (from-to)2428-2441
Number of pages14
JournalComputer Communications
Issue number11-12
Publication statusPublished - 10 Sept 2007

Scopus Subject Areas

  • Computer Networks and Communications

User-Defined Keywords

  • Ad hoc group communications
  • Authentication protocol
  • DoS-tolerant
  • Fault-tolerant
  • Forward secrecy


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