International Association for Cryptologic Research

International Association
for Cryptologic Research


Paper: Tripartite Authenticated Key Agreement Protocols from Pairings

Sattam S. Al-Riyami
Kenneth G. Paterson
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Abstract: Joux's protocol is a one round, tripartite key agreement protocol that is more bandwidth-efficient than any previous three-party key agreement protocol. But it is insecure, suffering from a simple man-in-the-middle attack. This paper shows how to make Joux's protocol secure, presenting several tripartite, authenticated key agreement protocols that still require only one round of communication. A pass-optimal authenticated and key confirmed tripartite protocol that generalises the station-to-station protocol is also presented. The security properties of the new protocols are studied using provable security methods and heuristic approaches. Applications for the protocols are also discussed.
  title={Tripartite Authenticated Key Agreement Protocols from Pairings},
  booktitle={IACR Eprint archive},
  keywords={Secure protocols; key agreement; authentication; pairings},
  note={ 12158 received 20 Mar 2002, last revised 16 Apr 2003},
  author={Sattam S. Al-Riyami and Kenneth G. Paterson},