Science and Development Network (SciDev.Net)
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, the authors analyze the lost smart card attack from Juang et al.'s scheme that proposes password authenticated key agreement. In order to bolster the security of the entire system, they mitigated some of its weaknesses.