1. A biometric authentication system configured to enable an authentication process, the process having predefined parameters associated therewith, the process providing for authentication of a user based on a comparison of a presented biometric with one or more previously stored biometric(s), the authentication system including a matching system providing as an output an output score based on a comparison of the presented and stored biometrics, the authentication system being configured to authenticate the user on determining that a parameter based on the output score meets a threshold score, and wherein the system includes interrogation means configured to interrogate the process so as to extract and use the predefined parameters to select an appropriate threshold score from a plurality of available threshold scores, each of the plurality of available threshold scores being previously generated for specific parameters.