Biometric authentication enhances security by utilizing unique biological traits of individuals, such as fingerprints, facial recognition, and iris scans, to verify identity. This method provides a more reliable and secure alternative to traditional password-based authentication, which can be easily compromised. By measuring distinct physiological characteristics, biometric systems create a digital representation of these traits, allowing access only to authorized users. This technology is increasingly used in mobile devices, security systems, and financial services. As it becomes more sophisticated, biometric authentication promises to bolster security measures across various sectors.