An Enhanced ID-based Authenticated Multiple Key Agreement Protocol

Authenticated multiple key agreement protocols provide secure communication between the participants via multiple session keys within one run of the protocol in an authentic way. Recently, Dehkordi and Alimoradi proposed an identity-based authenticated multiple key agreement protocol. Subsequently, Cheng presented ephemeral key compromise attack and impersonation attack against Dehkordi and Alimoradi's protocol. In order to overcome their security flaws, Cheng proposed an improvement on Dehkordi and Alimoradi's identity-based authenticated multiple key agreement protocol. In this paper, we demonstrate that Cheng's protocol is also insecure. Then we propose an identity-based multiple key agreement protocol which removes their weaknesses of the two protocols. A detailed analysis demonstrates that the proposed protocol can satisfy the strong security requirements.