Biometric authentication is a security process that uses unique physical characteristics of individuals to verify their identity. Common biometric traits include fingerprints, facial recognition, and iris patterns. This method is often used in devices like smartphones and security systems to ensure that only authorized users can access sensitive information or areas. The technology behind biometric authentication relies on specialized sensors and algorithms that analyze and compare the biometric data. Unlike traditional passwords, which can be forgotten or stolen, biometric traits are inherently linked to the individual, making this method a more secure option for protecting personal and sensitive information.