A provable authenticated group key agreement protocol for mobile environment

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, achi...

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Bibliographic Details
Published in:Information sciences 2015-11, Vol.321, p.224-237
Main Authors: Sun, Hung-Min, He, Bing-Zhe, Chen, Chien-Ming, Wu, Tsu-Yang, Lin, Chia-Hsien, Wang, Huaxiong
Format: Article
Language:English
Subjects:
Certificateless
Computer information security
Cost engineering
Cryptography
Group communication
Group key agreement protocol
Mathematical analysis
Mobile computing
Networks
Protocols
Semi-trusted third party
Servers
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Summary: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.
ISSN:0020-0255
1872-6291
DOI:10.1016/j.ins.2015.01.037