Biometric coprocessor is an extension to a biometric identification device that allows other physical biometric attributes of individuals to be used for biometric identification. When a biometric identification device is purchased, customers can also additionally purchase biometric coprocessor and can install its corresponding driver in order to make it function.
An example of a biometric coprocessor can be a retina identification system integrated additionally with a biometric fingerprint reader. As discussed above, a biometric retina scanner can be integrated in a biometric fingerprint reader, and its corresponding driver can be installed for double biometric identification of an individual. Adding a biometric coprocessor can be a challenging task for the new users.