摘要：Recently, Li and Hwang prop osed a biometrics-based remo te user au thenticatio n sch em e using smartcard s. The scheme uses biom etrics an d smart card s for the efficient us er au thenticatio n. Especially , th eyclaimed that their scheme is s ecure ag ain st im perso nation attack, replay attack , password rep lay attack withs tolen smart card s, and p arallel sessio n attack. Ho wev er, th is p aper po int ou t th at the scheme propo sed byLi and Hwan g is un secu re to password g uessing attack wh en attacker co uld get on e o f u ser's previouss essio n inform atio n, and get the u ser's s mart card. Furtherm ore, th is p ap er propo ses an improvedb iometrics-based rem ote user authen tication scheme us in g smart cards to so lv e th e p ro blem in the prev iouss ch em e. Our scheme is secu re agains t the attack s, wh ich Li an d Hwang's s ch eme is claimed
关键词：Biometrics Authenticatio n; Authentication Sch em e; Smart Card s; In fo rmation Secu rity
