In today's highly paranoid world, reliable personal authentication across a broad range of use cases is a significant technical problem. Uni-biometric systems describe the current state of the art in biometric identification methods, which rely on a single biometric attribute for verification. Spoof attacks, intra-user variability and susceptibility, noisy data, and unacceptable mistake rates are only some of the challenges that remain in person authentication using a single biometric trait despite significant progress over the past few years