Authenticated Key Agreement Protocol for Exchanging n2 Keys without Using One-way Hash Function

Abstract

An authenticated multiple-key agreement protocol without using a one-way function is proposed. The authors utilize an additional Diffie-Hellman mechanism to eliminate a known weakness. Benefited by the mechanism, the proposed protocol is capable of withstanding the known-key attack, even if all n2 session keys are adopted. Conventionally, only n2 - 1 keys should be adopted for the reason of the known-key attack. This scheme thus has a higher efficiency of exchanging session keys.