An image forming apparatus is provided, in which the image forming apparatus includes a scanner, a display device, processing circuitry configured to activate a secure application program, read a code for user authentication from a card medium that stores the code, conduct the user authentication using the read code, and display, on the display device, when the user authentication is successful, a function selection screen that receives a selection of a function among a plurality of functions, the plurality of functions including at least a scanner function.