Security of Multiple-Key Agreement Protocols and Propose an Enhanced Protocol.

Hui‐Feng Huang, Chin‐Chen Chang

Xie Qing, Tan X, Hu B +4 more

Zuowen Tan

Authenticated 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. DOI: http://dx.doi.org/10.5755/j01.itc.42.1.1381

Fei DENG, Jun He

Mohammad Sabzinejad Farash, Majid Bayat, Mahmoud Ahmadian‐Attari

M. Prasad, A. Vinaya, Babu G. Satyanarayana

An enhanced authentication key exchange protocol was proposed to exchange multiple session keys between two participants at a time. This paper shows that this enhanced protocol is insecure under the known session key attack, known long-term private key attack, signature forgery attack, and replay attack. This paper also proposes an enhanced and secure key agreement protocol for exchanging multiple session keys in one run of the protocol. The protocol is secure against the attacks mentioned above. Besides, a formal proof is given to guarantee the security of the proposed protocol under other potential attacks.