METHOD FOR AUTHENTICATING A USER OF A MOBILE DEVICE

• Main Authors: BUTOV, Dimitri, SCHILLEN, Peter, GUTHIER, Benjamin, SCHINDLER, Patrick, SCHICK, Friedrich, PREDIGER, Mark
• Format: Patent
• Language: English; French; German
• Published: 24.04.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

A method for authenticating a user of a mobile device (110) is proposed. The method comprising the following steps: a) (114) imaging at least one first image (116) of a face by using at least one camera (112) of the mobile device (110); b) (118) providing the first image (116) to a regular execution environment (120) of a processor (122) of the mobile device (110) and providing the first image (116) to a trusted execution environment (124) of the processor (122); c) (126) analyzing the first image (116) using at least one trained model in the regular execution environment (120) thereby determining a multi-dimensional vector comprising image information; d) (128) a face verification step comprising, di) (130) providing the multi-dimensional vector to the trusted execution environment (124), dii) determining a second image from the multi-dimensional vector in the trusted execution environment (124) by using at least one decoder (132), and diii) comparing the first image (116) and the second image, wherein in case the first image and the second image are identical the multi-dimensional vector is verified; div) in case the multi-dimensional vector is verified, the verified multi-dimensional vector is compared to a stored multi-dimensional vector of the user's face in the trusted execution environment (124), wherein in case the multi-dimensional vector and the stored multi-dimensional vector of the user's face are identical the user is authenticated.