US 11,934,524 B2
Secure fingerprint image system
Patrick Riehl, Lynnfield, MA (US); and Tze Lei Poo, Cambridge, MA (US)
Assigned to Analog Devices, Inc., Norwood, MA (US)
Filed by Analog Devices, Inc., Norwood, MA (US)
Filed on Jun. 19, 2020, as Appl. No. 16/906,639.
Claims priority of provisional application 62/864,879, filed on Jun. 21, 2019.
Prior Publication US 2020/0401699 A1, Dec. 24, 2020
Int. Cl. G06F 21/62 (2013.01); G06F 21/57 (2013.01); G06F 21/83 (2013.01); G06F 21/10 (2013.01)
CPC G06F 21/57 (2013.01) [G06F 21/6209 (2013.01); G06F 21/6245 (2013.01); G06F 21/83 (2013.01); G06F 21/1064 (2023.08); G06F 21/107 (2023.08); G06F 2221/031 (2013.01); G06F 2221/2149 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A device that is to implement fingerprint authentication, comprising:
an image sensor to capture an image of a fingerprint of a user for the fingerprint authentication; and
a readout integrated circuit (ROIC) coupled to the image sensor, the ROIC to utilize an encryption key to perform encryption of the image, wherein the encryption key is unique to the device, the ROIC is to transmit the encryption key via an interface to a trusted execution environment, and the ROIC is to cause an irreversible procedure to be performed in response to transmission of the encryption key via the interface, and
wherein the irreversible procedure prevents the ROIC from subsequent transmission of the encryption key via the interface.