Paper 2010/473

Two Attacks on Dutta’s Dynamic Group Key Agreement Protocol

Hui Zhang, Chunxiang Xu, and Abdur Rashid Sangi


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.

Available format(s)
-- withdrawn --
Publication info
Published elsewhere. The paper has been removed by the editors.
attackgroup key agreementdynamicimpersonation
Contact author(s)
zzhui @ yahoo com cn
2010-12-08: withdrawn
2010-09-08: received
See all versions
Short URL
Creative Commons Attribution
Note: In order to protect the privacy of readers, does not use cookies or embedded third party content.