作者: Young-Hwa An
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摘要: Password-based authentication schemes have been widely adopted to protect resources from unauthorized access. In 2010, Khan et al. proposed an efficient and secure dynamic ID-based scheme overcome the weaknesses of Wang al.'s scheme. this paper, we show that is vulnerable password guessing attack, forgery does not provide user anonymity. Also, propose improved security drawbacks anonymity session key agreement, even if secret values stored in smart card revealed. As a result, relatively more than related terms security.