| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent contents from being erased erroneously and completely even due to any erroneous operations of a user, and to bill the charges according to the use of contents to the user. <P>SOLUTION: In the contents reception and distribution system that uses an IT home electric device incorporating an HDD, contents encrypted not to be changed or erased are recorded on the second layer of a two-layer recording medium, the contents are decoded by using a secret key provided from a contents manager when a user makes contents use contact with the manager, and a contents use right is provided. <P>COPYRIGHT: (C)2004,JPO |
