| 摘要 |
<p>A secure data area of a semiconductor memory card of the present invention stores a media ID and an encrypted content key. The media ID has been stored during the production of the semiconductor memory card and the encrypted content key is generated by encrypting the first content key using the media ID. A non-secure data area of the semiconductor memory card stores trial data and purchase data. The trial data includes the first encrypted content generated by encrypting a content for promotion using the first content key. The purchase data includes the second encrypted content and encrypted management information. The second encrypted content is generated by encrypting a content related to the content for promotion using the second content key and the encrypted management information includes the second content key, a vendor ID, and a usage condition.</p> |
