A communication-efficient three-party password authenticated key exchange protocol
Information Sciences: an International Journal
Cryptanalysis of a communication-efficient three-party password authenticated key exchange protocol
Information Sciences: an International Journal
The Journal of Supercomputing
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A password-based three-party encrypted key exchange (3PEKE) is a protocol that enables any pair of two registered clients to establish session keys with the help of a trusted server such that each client shares only one password with the server. This approach greatly improves the scalability of key agreement protocol in distributed environments and provides great user convenience. This article proposes a new password-based 3PEKE scheme that completes its entire job in only a record low four steps, which we prove that it is optimal for password-based 3PEKE protocols. The security of the proposed scheme, as we will detail later, has been proved in the random oracle model.