A new three-party-authenticated key agreement scheme based on chaotic maps without password table

摘要

Three-party-authenticated key agreement allows two users to establish a common session key through a trusted server via an insecure communication channel. Early authenticated key agreement schemes were mostly based on either pairing operations, hash operations, or modular exponentiation operations. In 2011, Wang and Zhao took a new path and built their three-party-authenticated key agreement scheme on the basis of chaotic maps. By applying Chebyshev chaotic maps, Wang and Zhao succeeded in lifting their scheme up to a higher level of efficiency and security. In this paper, we shall propose a new three-party-authenticated key agreement scheme based on chaotic maps that can do without passwords. Keeping no password table, our new scheme is completely resistant to password guessing attacks. Besides that, our scheme also offers thorough privacy protection to the users, so the user forgery attack can cause no damage. Compared with the schemes currently available including Wang and Zhao's work, our new scheme obviously provides better security.