A provable authenticated group key agreement protocol for mobile environment

Hung Min Sun*, Bing Zhe He, Chien Ming Chen, Tsu Yang Wu, Chia Hsien Lin, Huaxiong Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)


Secure group communication over an untrusted open network is a continuing problem, especially in mobile environments. With the development of 3G networks and mobile computing technology, the number of group-oriented applications is increasing rapidly. Although these applications are convenient, achieving secure group communication to protect user privacy is a major concern. This study presents an authenticated group key agreement protocol for mobile environments. By using certificateless public key cryptography, the protocol reduces the cost of managing the certificates and avoids the key escrow problem. Instead of a fully-trusted server, the protocol uses a semi-trusted server, which helps users communicate but does not learn about the group key. The analytical results indicate that the proposed protocol provides good security in mobile environments.

Original languageEnglish
Article number11390
Pages (from-to)224-237
Number of pages14
JournalInformation Sciences
Publication statusPublished - 10 Nov 2015
Externally publishedYes


  • Certificateless
  • Group key agreement protocol
  • Mobile computing
  • Semi-trusted third party


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