Patent ID: 7508946

Claim:
An integrated circuit device for use with a mobile terminal apparatus comprising: a memory region; memory allocating means for allocating the memory region for each application wherein the memory allocating means allocates the memory region for each application in a hierarchical manner using a plurality of directories; first personal identification code setting means for setting, for each application that requires restricted access, allocated to the memory region, a personal identification code for controlling the right to access each application, wherein at least one application does not require restricted access and does not require the personal identification code; second personal identification code setting means for setting, for each directory in the memory region that requires restricted access, an additional personal identification code for controlling the right to access each application allocated to the directory associated with the additional personal identification code; wireless interface means for enabling the integrated circuit device to perform wireless communication with an external apparatus via an antenna; user input means for inputting, from a user, a personal identification code using the mobile terminal apparatus; and accessibility/inaccessibility managing means for managing each application allocated to the memory region to be accessible/inaccessible, wherein the accessibility/inaccessibility managing means sets each application for which the personal identification code is set to be inaccessible in a default setting, and, in response to the personal identification code input from a user matching the set personal identification code, sets the corresponding application to be accessible, and, in response to the personal identification code input from the user matching the set additional personal identification code, sets all applications in the corresponding directory to be accessible, and wherein the accessibility/inaccessibility managing means sets all applications to be inaccessible when a predetermined period of time elapses without a response from the external apparatus.