Two Attacks on Dutta’s Dynamic Group Key Agreement Protocol

Hui Zhang; Chunxiang Xu; Chengbang Li; Abdur Sangi

Wireless Communications and Applications. First International Conference, ICWCA 2011, Sanya, China, August 1-3, 2011, Revised Selected Papers

Research Article

Two Attacks on Dutta’s Dynamic Group Key Agreement Protocol

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@INPROCEEDINGS{10.1007/978-3-642-29157-9_40,
    author={Hui Zhang and Chunxiang Xu and Chengbang Li and Abdur Sangi},
    title={Two Attacks on Dutta’s Dynamic Group Key Agreement Protocol},
    proceedings={Wireless Communications and Applications. First International Conference, ICWCA 2011, Sanya, China, August 1-3, 2011, Revised Selected Papers},
    proceedings_a={ICWCA},
    year={2012},
    month={5},
    keywords={},
    doi={10.1007/978-3-642-29157-9_40}
}

Hui Zhang
Chunxiang Xu
Chengbang Li
Abdur Sangi
Year: 2012
Two Attacks on Dutta’s Dynamic Group Key Agreement Protocol
ICWCA
Springer
DOI: 10.1007/978-3-642-29157-9_40

Hui Zhang¹^,*, Chunxiang Xu¹^,*, Chengbang Li¹^,*, Abdur Sangi¹

1: University of Electronic Science and Technology of China

*Contact email: zzhui@yahoo.com.cn, chxxu@uestc.edu.cn, jeriffe@163.com

Abstract

Ratna Dutta and Rana Barua proposed a dynamic group key agreement protocol with constant round referred to as DGKA protocol. They claimed that the DGKA protocol is dynamic, efficient and provably secure under DDH assumption. In this paper, we analyze the security of the DGKA protocol and discovered its vulnerable nature towards two attacks. The first attack relates to the fact that this protocol does not satisfy the key independence property which is crucial for dynamic group key agreement protocol. The second one is an impersonation attack which demonstrates that the DGKA protocol is vulnerable to replay attacks.

Published: 2012-05-29

: http://dx.doi.org/10.1007/978-3-642-29157-9_40