in the past , user authorization based on biometric information was conducted by correlating a single instance of biometric information against a template . by using this method , a percentage of the population is difficult to authenticate . further , due to skin damage and injuries , sometimes biometric information is not suited to identification . a sore throat affecting voice information and scraped finger tips affecting fingerprint information are two examples of common problems with authorization in dependence upon biometric information . a method of authenticating a user in dependence upon biometric input information is disclosed . the method allows a user to select biometric information sources and a number of repetitions for each source in order to customize the process of biometric user authentication .