US Patent 10212189 Authentication of client devices using modified images

Systems and methods for detecting phishing attacks and identifying attackers are described. In embodiments, a server system may modify a template image based on user information and provide the modified image to a user system with a login page. The server system may obtain authentication credentials with an image rendered by the user system. The server system may authenticate the user system based on the authentication credentials and information included in the rendered image. Other embodiments may be described and/or claimed.