It looks like the DRM systems used to stop the copying of HD-DVD disks are dropping like flies after hackers responded to this news with a new method of attack
http://www.theregister.com/2007/04/10/cracked_aacs_keys_revoked/A next-generation DVD security group has responded to hack attacks that allow unfettered access to Blu-Ray and HD-DVD content by pulling the encryption keys of PC applications associated with the attack.
The move makes it impossible to play newly released high-definition movies via versions of playback software, including versions of Intervideo WinDVD 8, known to be weak or flawed.
WinDVD 8 users need to update their software, closing the security hole and obtaining fresh encryption keys in the process.
Advanced Access Content System Licensing Administrator (AACS LA), the custodian of the AACS encryption used as content protection technology on next-generation DVD formats, said it had worked with manufacturers to revoke affected application encryption keys.
By doing this the AACS LA thought they had effectively beaten off the attackers, but it seems a new method has arrived involving Xbox drive firmware that can bypass all of the security and simply allow access to the disks content and unscrambling keys with no problem.
https://forum.doom9.org/showthread.php?t=124294&page=5You,ll note the forum postings there is rather frantic in the sudden breakthroughs by different members of their community all striving to find the simplest solution.
Once more the ball is in the court of the AACS LA, will they release a patch to defeat this hack or given the number of Toshiba drives in x-boxes (99%) is this even possible ?