Biometric devices function as advanced security measures by utilizing unique physiological characteristics, such as fingerprints, facial recognition, or iris scans, to authenticate identities. These devices enhance security systems by providing a more reliable and less easily replicated form of authentication compared to traditional methods like passwords or PINs. Biometric authentication not only increases security but also offers convenience, as users typically find it easier to use their biometric traits. Their application spans various sectors, including personal electronics, banking, and access control in secure facilities.