Biometric Technology Issues

Abstract

It is pertinent to revisit the fundamentals of biometric technology, in order to ensure a proper understanding of what is actually happening within a biometric matching transaction. The biometric template is discussed, with various approaches considered as well as the granularity of observable features. The biometric capture device is then considered, from both an operational and practical maintenance perspective, before moving on to the biometric matching algorithm. The distinction between scientific theory and practical operation is made, stressing that, in the latter case, there exist several variables which do not occur under laboratory conditions and yet will impact upon realised performance. The biometric matching threshold is considered and a new model, the Proximity Matching Method, is introduced accordingly. This approach holds the promise for a much improved performance. The question of functions and routines as exposed by the device manufacturer receives some attention, as does the subject of data management and data flow throughout the system. Finally, we consider technology standards and their applicability to biometrics, before restating the importance of equivalence.