Biometric registration is the process of capturing and storing an individual's unique physical or behavioral characteristics, such as fingerprints, facial features, iris patterns, or voiceprints, for the purpose of identity verification. This data is collected using specialized sensors and securely stored in a database. During future authentication attempts, the system compares the presented biometric data with the registered template to confirm the user's identity. Biometric registration enhances security by making it more difficult for unauthorized users to gain access, as biometric traits are generally unique to each person and hard to replicate or steal. It is commonly used in access control, mobile devices, and secure facilities.