A security enhanced timestamp-based password authentication scheme using smart cards
The intent of this letter is to propose an efficient time-stamp based password authentication scheme using smart cards. We show various types of forgery attacks against Shen et al.'s timestamp-based password authentication scheme and improve their scheme to ensure robust security for the remote authentication process, keeping all the advantages of their scheme. Our scheme successfully defends the attacks that could be launched against other related previous schemes.
authentication smart card forgery attack cryptanalysis