Patent ID: 7058613
Filing Date: 2006-06-06
Classification: G06F,G06Q,G07F

Abstract:
1. An apparatus for checking user identification, comprising: an arithmetic-formula storing unit configured to store user-defined arithmetic formulas associated with respective users, the arithmetic formulas defining calculation of variables that are assigned to respective digit positions arranged on a display screen; a display unit configured to display random digits at the respective digit positions arranged on the display screen when a user logs in; and a matching unit configured to retrieve from said arithmetic-formula storing unit one of the arithmetic formulas corresponding to a user identifier in response to the user input of the user identifier and an identification-purpose number, to calculate a value of said one of the arithmetic formulas by assigning the random digits to said one of the arithmetic formulas, to compare the value with the identification-purpose number, and to authenticate the user in response to a match therebetween.