This book constitutes the refereed proceedings of the International Conference on Biometrics, ICB 2007, held in Seoul, Korea, August 27-29, 2007. The 34 revised full papers presented were carefully reviewed and selected from 303 submissions. Biometric criteria covered by the papers are assigned to face, fingerprint, iris, speech and signature, biometric fusion and performance evaluation, gait, keystrokes, and others. In addition the results of the Face Authentication Competition (FAC 2006) are also announced in this volume.