Device, System, and Method of Identifying a specific user from a profile image containing multiple people

The present disclosure involves a method. A request is received from a user to participate in an electronic social network. In response to the receiving of the request, a user is prompted to upload a digital picture that is representative of the user. An uploaded digital picture is uploaded in response to the prompting. The uploaded digital picture of the user is scanned for human faces. The user is prompted to upload a different digital picture that is representative of the user if the scanning indicates that the uploaded digital picture contains no human faces. The user is prompted to identify the human face belonging to the user if the scanning indicates that the uploaded digital picture contains a plurality of human faces.