Hackers Claim HD DVD Encryption Circumvented
December 28, 2006 12:24 PM
comment(s) - last by
BackupHDDVD may be this generations DeCSS
was first published on HWUpgrade.com
It hasn’t been completely verified yet, but a user named "muslix64" has posted an exploit in a thread on
the Doom9 forum
claiming he has been able to circumvent AACS, the encoding format used to protect HD DVD and Blu-ray content.
"Muslix64" claims to have completely backed up an HD DVD movie and provides a Rapidshare link to download BackupHDDVD, a small Java-based utility that aids users to backup their HD DVDs. A
link to see the program in action has also been posted.
"Muslix64" describes the utility as "a java based command line utility that decrypt video files (.evo) from a HD DVD disk that you own, to your hard drive and you can play them back with a HD DVD player software."
Although much of the dirty work in backing up an HD DVD movie is done by the tool, users are still required to find their own cryptographic keys for the disc being copied. No guidance is provided to help users find the keys but the author suggests the process is trivial, which suggests some exploit in the player software or hardware exists as the keys are not meant to be easily obtained.
Although the exploit hasn’t been completely confirmed yet, if it turns out to be true it could mean a number of things. For one, it is possible that we might start seeing pirated HD DVD content. In addition, since Blu-ray also uses AACS, we might see a similar crack be released for Blu-ray movies in the next couple of weeks.
"Muslix64" claims the tool works on his XBOX 360 external HD DVD player, but that the software should not be limited to just one specific player.
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Why Not Just Read the LCD Matrix?
12/30/2006 4:47:49 PM
If you had a LCD circuit that could do the resolution and refresh rate of the HD or Blueray movie, then you could make a reading circuit that interfaced the raw matrix bits that are given to the LCD glass panel. You could then convert the data to your own movie format as it reads what is displayed. The sound is another matter.
RE: Why Not Just Read the LCD Matrix?
1/1/2007 7:26:23 PM
Yeah of course this can be done, the electronics are not that hard.
However you have the bandwidth of the uncompressed stream to deal with ie equivalent to the professional format HDSDI.
You then need a realtime encoder that can do HDSDI > Mpeg4 or your chosen format (and good quality ones aren't cheap).
Further I suspect that the decoded picture contains some signature or watermark that can be read to identify the equipment that did the decoding. Thus if you pirate it for redistribution, then the authorities would be able to trace all those copies back to your equipment. Of course you might detect and remove those stamps, but since there is more than one technology you need to know what you are doing.
The costs of the system are not justified for home use, therefore the only application for it is mass piracy or making material available for unencrypted museum archive say a century from now.
"The whole principle [of censorship] is wrong. It's like demanding that grown men live on skim milk because the baby can't have steak." -- Robert Heinlein
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