MOBILE DEVICE, PERSONAL INFORMATION DEVICE, APPLICATION DEVICE, AND INFORMATION DATA PROVIDING METHOD

摘要

PROBLEM TO BE SOLVED: To use information data among different mobile devices without detriment to copyright protection and confidentiality, thereby improving convenience.

SOLUTION: A personal information device 20 for user authentication and an application device 30 for storing information data and programs are installed to a mobile device 10 in a freely removable manner. The application device 30 is made usable by the personal information device 20 when the authentication result shows that both user authentication of the user and the device 20, and interdevice authentication of the devices 20 and 30 prove rightful.

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