Security Enhancement on Li-Lee’s Remote User Authentication Scheme Using Smart Card

Rafael Martinez Pelaez, Francisco Rico Novella, Pablo Velarde Alvarado


Recently, Li and Lee proposed a new remote user authentication scheme using smart card. However, their scheme requires a verification table and the user’s identity is not protected. Moreover, users cannot change their password off-line. In order to overcome the security flaws, we propose a new scheme which provides more security without affecting the merits of the original scheme.


cryptanalysis; mutual authentication; network security; session key; smart card

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