Dr. Anil K. Jain is University Distinguished Professor and Douglas E. Zongker endowed professor at Michigan State University. Dr. Arun Ross is Martin J. Vanderploeg Endowed Professor at Michigan State University. Dr. Karthik Nandakumar is an Associate Professor of Computer Vision at Mohamed Bin Zayed University of Artificial Intelligence (MBZUAI). Thomas Swearingen is a Graduate Research Assistant at Michigan State University pursuing his Ph.D. in biometrics. The authors' many publications include the Springer titles Selfie Biometrics: Advances and Challenges, Encyclopedia of Biometrics, Handbook of Face Recognition, Handbook of Fingerprint Recognition, Handbook of Biometrics, Handbook of Multibiometrics, and Biometric Systems: Technology, Design and Performance.