The Saga of decrypting an AACS protected movie, by Muslix64.
December 6:
I just bought a HD-DVD drive to plug on my PC, and a HD movie, cool! But when I realized the 2 software
players on windows don't allowed me to play the movie at all, because my video card is not HDCP compliant and because I
have a HD monitor plugged with DVI interface, I started to get mad... This is not what we can call "fair use"! So I
decide to decrypt that movie. I start reading the AACS specification I have found on the net. I estimate it will take
me about 4 weeks of full time job to decrypt that. I was wrong, it was in fact, easy...
BTW, when I disable my HD monitor, I can watch the movie,on my old VGA screen, but, what is the point of having
a HD monitor and not being able to watch a HD movie on it!
December 7 to December 12:
Nothing, I try many things, but I'm going nowhere. I change my technique
December 13:
Now I focus only on title key. I was very surprise to realize that the title key is there, in memory! Can it be
that easy? Around 7PM, I decrypt my first movie "pack". Around 11PM, I have now a totally decrypted movie! But there is
a problem. Frame skipping.
December 14:
After many tests, I found a field in the Nav pack, that fix the frame skipping problem.
Wow! Now I can watch a smooth playback of an HDDVD film that I have decrypted!
After only 8 days of work, I was able to decrypt an HD-DVD movie! What's the problem? There is a major
security problem somewhere.
December 15 and December 16:
I put together a small program called "BackupHDDVD", a java based command line utility to decrypt movies.
December 17:
I made a small video called "AACS is Unbreakable" where you can see the output of the program while decrypting.
You can also see a playback of a decrypted movie.
December 18:
Upload that video on YouTube
http://www.youtube.com/watch?v=_oZGYb92isE
December 20:
Upload the program and source code on RapidShare (V0.99)
http://rapidshare.com/files/8318838/...HDDVD.zip.html
December 21:
I want to go further in the decryption, so I decide to track down the "Volume unique key" instead of title key.
I found it also! I'm preparing BackupHDDVD V1.00, that will support volume key and title keys.
December 25:
Merry Christmas!
December 26:
I create a thread on the Doom9 forum about BackupHDDVD. People don't believe it...
