Biometric systems convert data derived from behavioral or physiological characteristics into templates, which are used for subsequent matching. This is a multi-stage process whose stages are described below. 

Enrollment: The process whereby a user's initial biometric sample or samples are collected, assessed, processed, and stored for ongoing use in a biometric system. Enrollment takes place in both 1:1 and 1:N systems. If users are experiencing problems with a biometric system, they may need to re-enroll to gather higher quality data.