Biometric authentication techniques

• Main Authors: Littwin, Gideon, Kucerova, Lucie, Hauck, Jerrold V, Tang, Feng, Hotelling, Steven P, Krstic, Ivan, Prakash, Deepti S, Hirsh, Eitan, Mensch, Thomas P, Sharma, Anup K, Kolin, Andrei, Kostka, Petr, Vasu, Pavan Kumar Ansosalu, Ballard, Lucia E, Waldon, Matthew C, Hendel, Ziv, Littwin, Etai, Youngs, Lynn R, Pokrass, Jonathan, Malone, Michael R, Kaitz, Tal, Zeleznik, Christopher G, Gernoth, Thorsten, Laifenfeld, Moshe
• Format: Patent
• Language: English
• Published: 23.02.2021
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; HANDLING RECORD CARRIERS; PHYSICS; PRESENTATION OF DATA; RECOGNITION OF DATA; RECORD CARRIERS; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION; WIRELESS COMMUNICATIONS NETWORKS

Techniques are disclosed relating to biometric authentication, e.g., facial recognition. In some embodiments, a device is configured to verify that image data from a camera unit exhibits a pseudo-random sequence of image capture modes and/or a probing pattern of illumination points (e.g., from lasers in a depth capture mode) before authenticating a user based on recognizing a face in the image data. In some embodiments, a secure circuit may control verification of the sequence and/or the probing pattern. In some embodiments, the secure circuit may verify frame numbers, signatures, and/or nonce values for captured image information. In some embodiments, a device may implement one or more lockout procedures in response to biometric authentication failures. The disclosed techniques may reduce or eliminate the effectiveness of spoofing and/or replay attacks, in some embodiments.