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Dynamic group key exchange revisited

Conference Paper


Abstract


  • In a dynamic group key exchange protocol, besides the basic group setup protocol, there are also a join protocol and a leave protocol, which allow the membership of an existing group to be changed more efficiently than rerunning the group setup protocol. The join and leave protocols should ensure that the session key is updated upon every membership change so that the subsequent sessions are protected from leaving members (backward security) and the previous sessions are protected from joining members (forward security). In this paper, we present a new security model for dynamic group key exchange. Comparing to existing models, we do a special treatment to the state information that a user may use in a sequence of setup/join/leave sessions. Our treatment gives a clear and more concise definition of session freshness for group key exchange in the dynamic setting. We also construct a new dynamic group key exchange protocol that achieves strong security and high efficiency in the standard model. © 2010 Springer-Verlag Berlin Heidelberg.

Publication Date


  • 2010

Citation


  • Yang, G., & Tan, C. H. (2010). Dynamic group key exchange revisited. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) Vol. 6467 LNCS (pp. 261-277). doi:10.1007/978-3-642-17619-7_19

Scopus Eid


  • 2-s2.0-78651092120

Start Page


  • 261

End Page


  • 277

Volume


  • 6467 LNCS

Abstract


  • In a dynamic group key exchange protocol, besides the basic group setup protocol, there are also a join protocol and a leave protocol, which allow the membership of an existing group to be changed more efficiently than rerunning the group setup protocol. The join and leave protocols should ensure that the session key is updated upon every membership change so that the subsequent sessions are protected from leaving members (backward security) and the previous sessions are protected from joining members (forward security). In this paper, we present a new security model for dynamic group key exchange. Comparing to existing models, we do a special treatment to the state information that a user may use in a sequence of setup/join/leave sessions. Our treatment gives a clear and more concise definition of session freshness for group key exchange in the dynamic setting. We also construct a new dynamic group key exchange protocol that achieves strong security and high efficiency in the standard model. © 2010 Springer-Verlag Berlin Heidelberg.

Publication Date


  • 2010

Citation


  • Yang, G., & Tan, C. H. (2010). Dynamic group key exchange revisited. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) Vol. 6467 LNCS (pp. 261-277). doi:10.1007/978-3-642-17619-7_19

Scopus Eid


  • 2-s2.0-78651092120

Start Page


  • 261

End Page


  • 277

Volume


  • 6467 LNCS