A mobile biometric system-on-token system for signing digital transactions

The System-on-Token architecture for biometric systems gives users have full control over their biometric data and lets them sign digital transactions using biometrics. The authors implemented and tested in on a commercial mobile device, the Nokia N800. The implementation runs a port of the National Institute of Standards and Technology's Biometric Image Software, and it can complete a transaction in less than two seconds, including verifying the vendor, verifying the transaction, extracting features, matching features, and signing the transaction using a legal X.509 certificate. The authors tested the system's accuracy using 1,664 images from the BiosecurID database with nine types of preprocessing. They tested its speed using 36 fingerprints with nine types of preprocessing. All the certificates were issued by the Spanish Bureau of Money and have legal validity.