| 摘要 |
The present invention is based on an authentication and access control system to the protected contents of a DVD-VIDEO in which the Release Code RK is different for each session. Sharing the RK code with other users does not allow to unlock the protected contents.
This method protects the content of a dvd-video, by the creation and management of an authentication server containing a database of public codes and secret keys, and it is characterized by the user entering an unlock code different for each DVD session, and it is also characterized by the generation of the above mentioned unlock code by the authentication server remotely contacted by the user.
The system requires the user to connect to the authentication server via one of the following methods:
- A fixed telephone with "tones" selection
- A Mobile phone with SMS sending/receiving capabilities
- A personal Computer with Internet access
The system works on a common DVD-VIDEO READER compliant to the specifications.
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