| 摘要 |
A copy-protection method includes modifying address information (202, 204) on an optical disc (100). The modified address information (402) renders certain portions of the disc inaccessible and is not copied during typical copying operations. Storing user information (206) between the inaccessible portions prevents copying the user information to an unauthorized duplicate of the disc. Additionally, when a user wishes to use data stored on the disc, a disc reader optionally determines (502) whether the portions are accessible. If the portions are accessible (506), the user is prevented from using the data. If the portions are inaccessible (504), the user is permitted to use the data. |
