Patent ID: 7769999
Filing Date: 2010-08-03
Classification: G06F,G07C,H04L

Abstract:
1. A method for remote password based authentication using smart cards for accessing a communications network, the method comprising: generating, by an authentication server, a first encrypted user message g sending, by the authentication server, the first encrypted user message and predetermined system parameters, g, p to be stored in a smart card used by the user, that enable the smart card to send a login request message when the user uses a remote terminal to login to the communications network by entering the user ID and the user password PW, wherein the login request message contains a first value, C1 and a second value, C2, the C1 being generated according to C receiving, by the authentication server, the login request message containing the first value and the second value; and verifying, by the authentication server, a predetermined relationship between the second value and a third value, wherein the third value is generated using the third hash function having at least one input based on a function of the first value and the first hash function which uses the security key as an input.