Information device, information server, information processing system, information processing method, and information processing program

摘要

Provided are an information device, an information server, an information processing system, an information processing method and an information processing program enabling a user who obtains a content in a legitimate manner to use the content in any other information device owned by the user. An information server ( 4 ) associates a user with information devices ( 1 - 1 through 1 - 3 ) owned by the user to control them, and the same service data (a leaf ID and key information DNK) is written in the information devices owned by the same user to treat a plurality of information devices owned by the user as one group. As a result, a content obtained by the information device ( 1 - 1 ) owned by the user can be used in other information devices ( 1 - 2, 1 - 3 ) owned by the user. Moreover, the content can be used in the information devices through directly transferring the content or a license between the information devices ( 1 - 1 through 1 - 3 ).