USER AUTHENTICATION CONTROL DEVICE, USER AUTHENTICATION DEVICE, DATA PROCESSING DEVICE, AND USER AUTHENTICATION CONTROL METHOD OR THE LIKE

摘要

PROBLEM TO BE SOLVED: To provide a user authentication control device, a user authentication device, a data processing device, and a user authentication control method or the like capable of keeping a balance between convenience and safety for a user by controlling an authentication interval or an effective period of authentication in accordance with communication speed.SOLUTION: A user authentication control device controls an effective period of authentication in a user authentication device incorporated in a data processing device connected through a network with a server device. The user authentication control device includes data flow amount acquisition means for measuring the amount of data flow communicated through the network with the server device and effective period determining means for determining the effective period of authentication by the amount of data flow and a factor determined on the basis of the server device or importance of data in the server device, and defines as the expiration of the effective period the time when the cumulative total of the amount of data flow exceeds a predetermined prescribed amount.