Group-based authentication and key agreement

Yu Wen Chen, Jui Tang Wang, Kuang Hui Chi, Chien-Chao Tseng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

57 Scopus citations


This paper presents an authentication and key agreement protocol to streamline communication activities for a group of mobile stations (MSs) roaming from the same home network (HN) to a serving network (SN). In such a roaming scenario, conventional schemes require the SN to interact with the HN for authenticating respective MSs, at the cost of repeated message exchanges and communication delay. Instead, in our design, when the first MS of a group visits, the SN performs full authentication with the concerned HN and thereby obtains authentication information for the MS and other members. Thus when any other MS of the same group visits, the SN can authenticate locally without subsequent involvement of the HN, so as to simplify protocol operations. We will show that our scheme does not trade performance for security and robustness to the extent that security requirements are unduly weakened. Both qualitative and quantitative discussions indicate that our proposed scheme lends itself to pragmatic settings.

Original languageEnglish
Pages (from-to)965-979
Number of pages15
JournalWireless Personal Communications
Issue number4
StatePublished - 1 Feb 2012


  • Authentication and key agreement
  • Group key
  • Roaming
  • Security
  • Wireless network

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