3. A method in accordance with claim 1 , further comprising calculating an equal error rate when the minimum genuine matching score is equal to or less than the maximum imposter matching score.
1. A method of authentication comprising: conducting verification matching transactions between an authentication biometric template and enrollment biometric templates, and between the authentication biometric template and imposter biometric templates with a biometric authentication system, the imposter biometric templates being associated with known imposters; updating a genuine matching score distribution with at least one genuine matching score generated during said conducting step; updating an imposter matching score distribution with at least one imposter matching score generated during said conducting step; calculating a minimum genuine matching score and a maximum imposter matching score; determining whether the maximum imposter matching score is less than the minimum genuine matching score; and confirming an identity of an individual when the maximum imposter matching score is less than the minimum genuine matching score.