Illumination-based user authentication

A computer-implemented method for illumination-based user authentication, the computer-implemented method comprising:

• receiving a user authentication request for a computing device, and
• in response to receiving the user authentication request,
• causing a display device of the computing device to display a display pattern during a first time period;
• determining, based on image sensor data received from an image sensor device of the computing device, a responsive facial state during the first time period;
• determining a responsive correlation score for the display pattern and the responsive facial state, wherein the reflective correlation score is an estimated likelihood that that the responsive facial state indicates an authenticated end-user observing the display pattern;
• and
• determining whether to grant the user authentication request based on one or more authentication indicators, wherein the one or more authentication indicators comprise the responsive correlation score.

A computer program product for illumination-based user authentication, the computer program product comprising at least one non-transitory computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program code portions configured to:

• receive a user authentication request for a computing device, and
• in response to receiving the user authentication request,
• cause a display device of the computing device to display a display pattern during a first time period;
• determine, based on image sensor data received from an image sensor device of the computing device, a responsive facial state during the first time period;
• determine a responsive correlation score for the display pattern and the responsive facial state, wherein the reflective correlation score is an estimated likelihood that that the responsive facial state indicates an authenticated end-user observing the display pattern;
• and
• determine whether to grant the user authentication request based on one or more authentication indicators, wherein the one or more authentication indicators comprise the responsive correlation score.