International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
Biometrics is a science which uses persons distinguishable characteristics like fingerprints, iris, retina, hand geometries or behavioral characteristics like keystroke dynamics, gait etc for authentication. The biometric template is a digital representation of an individual's distinct characteristics extracted from biometric sample. The templates are the crucial elements of the biometric system. Once the templates are compromised, then the authenticity of the biometric systems is at risk, as the original biometric can be interchanged by the imposter's template or the template could be used to do replay attack or the original template can be spoiled so that the authenticated user of the system does not possess access.