| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a record carrier for storing a digital work. <P>SOLUTION: The record carrier includes access information for gaining access to the digital work, and a secondary channel in which secondary channel information is stored which is used for encrypting, decrypting or verifying the access information. In order to prevent, hinder or discourage tampering with the access information, the secondary channel is stored on the record carrier on substantially the same position as the access information. In a preferred embodiment, the secondary channel information is changed when the access information is changed. This actualizes a record carrier for which a replay-attack is prevented. The invention further relates to a method for recording a digital work on a record carrier, a device for recording, and a device for reading. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
