A security system uses a camera to verify that a user trying to unlock a device with an authentication code is an authorized user and linked to that authentication code. The system receives an authentication code from the user trying to unlock the device. The system also captures an image of the user while the user enters the authentication code. The system compares the captured image of the user with one or more stored images of authorized users linked to the entered authentication code to determine whether the captured image matches one of the stored images of authorized users linked to the entered authentication code. Further, the system provides a notification about an unauthorized unlock attempt when the system is unable to confirm the authenticity of the user based on the image comparisons.
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Faaborg, Alexander and Sachter-Zeltzer, Ariel, "SECURITY SYSTEM WITH AUTHENTICATION CODE AND ADAPTIVE PHOTO LOG", Technical Disclosure Commons, (January 06, 2016)