Patent ID: 11361058

Abstract:
A method used in a mobile equipment for authenticating or identifying a user based on his face includes acquiring a sequence of biometric face sample corresponding to successive image frames of the user in a Trusted Execution Environment of the mobile equipment, and, in the Trusted Execution Environment, modifying or replacing some of the biometric face samples in the sequence, so as to generate a modified sequence with test biometric face samples. The method includes transmitting the modified sequence to a Rich Execution Environment of the mobile equipment, and classifying at least one portion of the biometric face samples using a classifier in the Rich Execution Environment, so as to generate for each classified biometric face sample a set of intermediary outputs and a classification result. The method also includes, for each classified biometric face sample, sending at least some of the intermediary outputs or classification result, and/or a digest of the intermediary outputs, to the Trusted Execution Environment. The method further includes, for at least one test biometric face sample, verifying the at least some of the intermediary outputs and/or result and/or digest in the Trusted Execution Environment.