FIELD: physics, computer engineering.
SUBSTANCE: invention relates to an information processing system, an image processing device, a user device, a control method and a data medium. The technical result is achieved through a service intermediary that receives a coordination command from a web browser to coordinate a web application server with a coordination device, generates a script to be authenticated by an authentication method which corresponds to the server, and forwards the generated script to the service provider system of the coordination addressee indicated by said coordination command. The web browser forwards to the coordination device authentication information or an authentication marker obtained in response to an input operation on a screen for inputting authentication information displayed by executing the script. The coordination device then receives and stores the authentication information or authentication marker.
EFFECT: low probability of leakage of authentication information and low probability of interception of authentication information in a communication channel by preventing storage of authentication information in a proxy server and preventing input of authentication information by a user directly into an image processing device.
9 cl, 24 dwg
