An Enhanced ID-based Authenticated Multiple Key Agreement Protocol
Keywords:multiple key agreement, identity-based cryptography, forward security, mutual security
AbstractAuthenticated multiple key agreement protocols not only allow participants to agree the multiple session keys within one run of the protocol but also ensure the authenticity of the other party. In 2011, Dehkordi et al. proposed an identity-based authenticated multiple key agreement protocol. In this paper, we demonstrate that Dehkordi et al.’s protocol is vulnerable to impersonation attack. Furthermore, we have found that their protocol cannot provide perfect forward security or mutual security. Then we propose an identity-based multiple key agreement protocol which removes the weaknesses of the Dehkordi et al.’s protocol. Compared with the multiple key agreement protocols in the literature, the proposed protocol is more efficient and holds stronger security.