This comprehensive and innovative handbook covers aspects of biometrics from the perspective of recognizing individuals at a distance, in motion, and under a surveillance scenario. Features: Starts with a thorough introductory chapter; Provides topics from a range of different perspectives offered by an international collection of leading researchers in the field; Contains selected expanded contributions from the 5th IAPR International Summer School for Advanced Studies on Biometrics for Secure Authentication; Investigates issues of iris recognition, gait recognition, and touchless fingerprint recognition, as well as various aspects of face recognition; Discusses multibiometric systems, and machine learning techniques; Examines biometrics ethics and policy; Presents international standards in biometrics, including those under preparation. This state-of-the-art volume is designed to help form and inform professionals, young researchers, and graduate students in advanced biometric technologies.