An enhanced robust and efficient password-authenticated key agreement using smart cards

Although the smart card brings conveniences, it also increases the risk in the case of lost cards. When the smart card is possessed by an attacker, the attacker will possibly attempt to analyze the secret information within the smart card to deduce the authentication mechanism of the server and then forge user credentials or break the entire authentication system In this paper, we analyze the lost smart card attack from Juang et al.'s scheme [5] that proposes password authenticated key agreement. In order to bolster the security of the entire system, we mitigated some of its weaknesses.