| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce a processing load for license management. <P>SOLUTION: A content management method manages a content which requires a license in use. When an instruction that the use of a specific encrypted content should be started is accepted, in a storage device for storing license data including an identifier of a group and a group key used for generating an encryption key for the content belonging to the group, the management method includes steps of: extracting the group key from the license data stored by being associated with the identifier of the group to which the specific content belongs; generating an encryption key for the specific content using the extracted group key and identification information on the specific content; and decrypting the specific content using the encryption key for the specific content. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
