The use of computers to recognize humans from physical and behavioral traits dates back to the digital computer evolution of the 1960s. But even after decades of research and hundreds of major deployments, the field of biometrics remains fresh and exciting as new technologies are developed andoldtechnologiesareimprovedandfieldedinnewapplications.Wor- wide over the past few years, there has been a marked increase in both g- ernment and private sector interest in large-scale biometric deployments for accelerating human machine processes, efficiently delivering human services, fighting identity...