Secure Verifier-Based Three-Party Key Exchange in the Random Oracle Model
Hung‐Yu Chien · Journal of information science and engineering · 2011
A Three Party password Authenticated Key Exchange protocol (3PAKE) facilitates two clients to establish authenticated session ke ys via the help of a tr usted server. This approach enhances the scalability of key agreement issue and facilitates users' convenience in distributed environments. In this paper, we show the secur ity weaknesses of previous works, and then propose our new scheme, using password verifiers. The scheme is efficient, and the key indistinguishability is proved re lative to the com putational Diffie-Hellman problem. It is the first provably secure verifier-based 3PAKE protocol.