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International Journal of Advanced Robotic Systems A Remote User Authentication Scheme with Anonymity for Mobile Devices Regular Paper

With  the  rapid  growth  of  information technologies, mobile devices have been utilized in a variety of  services  such  as  e‐commerce. When  a  remote  server provides such e‐commerce services to a user, it must verify the legitimacy of the user over an insecure communication channel.  Therefore,  remote  user  authentication  has  been widely  deployed  to  verify  the  legitimacy  of  remote  user login requests using mobile devices like smart cards. In this paper  we  propose  a  smart  card‐based  authentication scheme  that  provides  both  user  anonymity  and  mutual authentication  between  a  remote  server  and  a  user.  The proposed  authentication  scheme  is  a  simple  and  efficient system  applicable  to  the  limited  resource  and  low computing performance of the smart card. The  proposed  scheme  provides  not  only  resilience  to potential  attacks  in  the  smart  card‐based  authentication scheme, but also secure authentication functions. A smart card  performs  a  simple  one‐way  hash  function,  the operations  of  exclusive‐or  and  concatenation  in  the authentication  phase  of  the  proposed  scheme.  The proposed  scheme  also provides user  anonymity using  a dynamic  identity  and  key  agreement,  and  secure password change.