Julian Ashbourn has been at the forefront of the biometrics industry since its inception, not as a creator or seller of biometric systems but as an implementer and user of the technology. This book picks up where his previous book, Practical Biometrics: From Aspiration to Implementation, left off, providing an authoritative understanding of both the technical and human factors involved in implementation of this important technology. – William Saito, Founder & CEO, Intecur, K.K., Tokyo, Japan