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In 2008, Yoon et al. presented three kinds of security attacks (YLY attacks for short) of a user authentication and key agreement scheme using smart cards in different scenarios. The YLY attacks are: perfect forward secrecy, the guessing attack, and the Denning-Sacco attack. The main goal of this paper is to propose a robust remote user authentication scheme using smart card that could not only withstand the traditional attacks, such as, the man-in-the-middle attack, the replay attack, the forgery attacks, the stolen smart card attack, and the denial of service attack, but also overcomes YLY attacks.