A method, system and computer program product for improving error discrimination in biometric authentication systems. The error discrimination is set to a predetermined security policy. A plurality of biometric samples are provided and authenticated by a computer system in conjunction with a security token. An alternate embodiment allows inputting of the plurality of biometric samples in a predetermined sequence. The predetermined input sequence is maintained as an authentication secret which may be used to further reduce the authentication transaction error rate. A user may input one or more biometric samples, where a portion of the biometric samples are inputted in a predetermined sequence, selecting from among a plurality of available processing units, a set of processing units which will generate intermediate results from the processing of the biometric samples, processing at least a portion of the biometric samples by the selected set of processing units to provide intermediate results, verifying the predetermined sequence, and arbitrating the intermediate results to generate a final result which at least meets a predetermined security policy. Various embodiments provide for a security token to perform at least a portion of the processing or the arbitration function.