Abstract:
The IEEE 802 standards ease the deployment of networking
infrastructures and enable employers to access corporate networks
while traveling. These standards provide two modes of communication
called infrastructure and ad-hoc modes. A security solution for the
IEEE 802.11's infrastructure mode took several years to reach maturity
and firmware are still been upgraded, yet a solution for the ad-hoc
mode needs to be specified. The present paper is a first attempt in
this direction. It leverages the latest developments in the area of
password-based authentication and (group) Diffie-Hellman key exchange
to develop a provably-secure key-exchange protocol for IEEE
802.11's ad-hoc mode. The protocol allows users to securely join and
leave the wireless group at time, accommodates either a single-shared
password or pairwise-shared passwords among the group members, or at
least with a central server; achieves security against dictionary
attacks in the ideal-hash model (i.e. random-oracles). This is, to the
best of our knowledge, the first such protocol to appear in the
cryptographic literature.
Keywords:
Dictionary Attacks, Dynamic Group Key Exchange, Diffie-Hellman,
Security Model.
Reference:
International Journal of Wireless and Mobile Computing (IJWMC), 2007.
Full paper: PostScript, PDF.
Related papers:
E. Bresson, O. Chevassut,
and D. Pointcheval, "Group
Diffie-Hellman Key Exchange secure Against Dictionary Attacks",
Proceedings of Asiacrypt'02, Queenstown, New Zealand,
Dec 1-5, 2002, pp 497--514.
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