Efficient identity-based authenticated multiple key exchange protocol

Authenticated multiple key exchange 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 this paper, we propose an identity-based multiple key exchange protocol. The authentication part of the proposed protocol is provably secure in the random oracle model under the BDH assumptions. The proposed identity-based multiple key exchange protocol is secure in a formal security model under the random oracle model upon the CDH assumptions and the BDH assumptions. Compared with the identity-based multiple key exchange protocols in the literature, the proposed protocol is more efficient and holds stronger security.