Binary Information Press
Currently, most of published key agreement protocols cannot provide perfect forward secrecy and avoid key escrow by Key Generation Center (KGC). Here, with bilinear pairings the authors firstly propose an ID-based One Round Authenticated Group Key Agreement protocol (OR-AGKA), which can satisfy the required security attributes. Subsequently, they give the extension of OR-AGKA (EOR-AGKA), which is a flexible protocol because they can arbitrarily construct subgroups in the proceeding of group key agreement. Finally, they analyze the security of the proposed protocols using provable security methods. They also show that the protocol EOR-AGKA can provide lower computation cost.