| 摘要 |
<p>The present invention achieves a configuration which, in a plurality of domain apparatuses, is capable of copying, moving, and using, in a commonly available manner, encrypted content. In a storage area of an information storage device, such as a memory card, which stores content, a domain key is stored which is stored in common at a plurality of domain apparatuses belonging to the same domain. In performing domain apparatus registration processing, a domain key is input from a management server and stored in a protected area. Encrypted content and a conversion title key, in which data including a title key to be applied to decryption of the encrypted content has been encrypted with a domain key, is stored in a general purpose area. By moving or copying the encrypted content and the conversion title key stored in the general purpose area between domain apparatuses, it is possible to use the domain key commonly possessed by the domain apparatuses to decrypt and use the encrypted content.</p> |
