US Patent 10939291 Systems and methods for photo recognition-based identity authentication

A combination of target images and control images are presented to a user device for selection by the user. Based on a correct selection of images that the user either recognizes or does not recognize, the user may be authenticated. Target images have some connection to a legitimate user in a way that a legitimate user may recognize the target image. Control images have no known connection to the legitimate user, such that they would not typically be recognized by the legitimate user. The legitimacy of a user may be determined based on images selected and/or not selected, depending on accompanying instructions for selection.