Patent ID: 7450929

Claim:
A communication system comprising: an information storage module that includes: a user identification memory operable to store a user identifier to uniquely identify in a communication network a user of the information storage module; and an authorization memory operable to store authorization information comprising a plurality of content identifiers that uniquely identify a plurality of respective downloaded application programs and a plurality of permission indications set by a content provider to prevent unauthorized use of the respective downloaded application programs, the authorization information individually associated with the user identifier, and each of the permission indications configured by the content provider to provide discrete individual authorization for the user to execute each of the respective downloaded application programs; a communication terminal device that includes: an external connection interface by which the information storage module is mountable on the communication terminal device, the information storage module configured to be supplied power by the communication terminal device through the external connection interface; a content memory configured to store the downloaded application programs; and a content controller operable to enable execution of authorized downloaded application programs and disable execution of an unauthorized downloaded application program, the unauthorized downloaded application program being included among the downloaded application programs stored in the content memory for which respective authorization information is not stored in the information storage module when the information storage module is mounted on the communication terminal device; and a management device configured to communicate with the communication terminal over the communication network, the management device including a correspondence memory operable to store a plurality of items of correspondence information, the management device further configured to individually manage each of the items of correspondence information, wherein each of the items of correspondence information is discretely indicative of an association between the user and a respective one of the downloaded application programs the user is authorized to execute.