DVD-Audio CPPM encryption broken
By Ryan Block 
posted Jul 7th 2005 9:20AM
posted Jul 7th 2005 9:20AM
Remember when DVD Jon released the DeCSS crack
to decrypt DVD video files a few years back? Seriously, who could forget where they were at that moment? Well, no, he
didn't exactly make a comeback to bust on the DVD-Audio standard's supposedly beefed up implementation of what they
(once called) the CPPM (Content Protection for Pre-recorded Media) crypto standard, but that certainly didn't stop
other peeps from breaking it wide open. It never does. That's right, they cracked DVD audio. Peep the tools over at
Engadget fav Rarewares, and happy evil communist music piracy
fair use!
[Via slashdot]
CPPM was not broken or exploited. They released a patch for WinDVD that can make the program output the decrypted audio stream. Future DVD-Audio discs will probalby ship with WinDVD's current key revoked. This is similar to the first DVD (Video) decrypting that was done via extracting the CSS key from the software Xing DVD player; I'm just suprised that this had not happened before now!
It does open the way for CPPM to be broken. If an algorithm to find a valid key that is similarly fast to the DeCSS algorithm can be constructed, then DVD-Audio decrypting will be future-proofed.
is this news? I have had the 5.1 DVD-Audio rip of the new Nine Inch Nails disc running on xbmc for a couple months now.... (buy it though, REAL music deserves to be paid for)
to #2, then I guess that cd shouldnt be bought hmm?
to engadget...!Hail the red flag, for the masses will come forth and establish the dictatorship of the proletariat so that we may all share our music!!!
When will they learn...
Encryption is NOT copy protection.
Encryption can not BE USED as copy protection.
#3: ouch. Not a brilliant disc, but you won't get a better demo of 5.1 listening to Nickelcrap.
These are good news for us, but I'm afraid this is an advantage to SACD.
With DVD-A's cripto broken they will forget very soon this format and implement even better SACD.
And that is a threat.