A device can include a fingerprint reader that generates fingerprint data representative of a fingerprint of a finger; circuitry that authenticates the fingerprint via an authentication process and that identifies a change of the fingerprint based at least in part on the generated fingerprint data and historical fingerprint data; and circuitry that, responsive to the identification of the change of the fingerprint, revises the authentication process based at least in part on at least a portion of the received fingerprint data.