Common Contracts
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Contributory Group Key Agreement Protocols, Revisited for Mobile Ad-Hoc Groups∗December 21st, 2005
Security of various group-oriented applications for mo- bile ad-hoc groups requires a group secret shared between all participants. Contributory group key agreement (CGKA) protocols, originally designed for peer groups in local- and wide-area wired networks, can also be used in ad-hoc sce- narios because of the similar security requirements and trust relationship between participants that excludes any trusted central authority (e.g., a group manager) from the computation of the group key. We revise original protocols from the perspective of the mobile ad-hoc communication, classify mobile ad-hoc groups based on the performance of involved mobile devices, specify trust relationship between participants, propose further optimizations to original pro- tocols to achieve better communication, computation and memory complexities.
