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Old 6th February 2007, 12:03   #35  |  Link
arnezami
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Join Date: Sep 2006
Posts: 390
Quote:
Originally Posted by evdberg View Post
But to calculate the processing key you still need the device key(s) ... and that's my whole point.
There are two ways to get Processing keys: using (1) Device Key(s) or (2) hacking them directly out of the software player. I'm not claiming you (or WinDVD) don't/doesn't need Device Keys to get the Media Key. The point is: you should only release the Processing Key or Last Sub Device key.

When I've got more time I may be able to explain this better. Personally I believe its much more likely we will only find one Device Key (while we should release a sub device key or processing key) when hacking a software player. But I can only explain that while also explaining the full subset difference algo.

arnezami
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