A biometric database is a collection of data that stores unique physical or behavioral characteristics of individuals, such as fingerprints, facial recognition, or iris patterns. These databases are used for identification and verification purposes, helping to enhance security in various applications, including law enforcement and access control. Biometric databases can be maintained by government agencies, private companies, or research institutions. They often require strict privacy and security measures to protect sensitive information. Examples of biometric systems include fingerprint scanners, facial recognition software, and iris recognition technology, which all rely on the data stored in these databases for accurate identification.