A system for biometrically authenticating a user includes: elements for obtaining image data that are representative of at least one user-associated biometric feature and at least one user-associated identifier, elements for extracting the at least one biometric feature in the image data, elements for extracting the at least one identifier in the image data, elements for performing a search for a reference biometric feature associated with the at least one identifier, elements for comparing the extracted biometric feature with the reference biometric feature, and elements for authenticating the user in accordance with a result of the comparison.