Slashdot Mirror

← Back to Stories (view on slashdot.org)

DVD-Audio's CPPM Circumvented

Posted by timothy on from the everything-that-rises-must-converge dept.

Bodysurf writes "After DVD-Video's CSS encryption was broken in 1999, the music industry chose a much more secure copy-protection method for DVD-Audio called Copy Protection for PreRecorded Media (CPPM). This protection scheme has remained publicly uncracked, but it was circumvented recently, providing the ability to save the unencrypted digital audio data. CDFreaks has the details."

4 of 415 comments (clear)

  1. Re:That took a while, eh? by Jeffrey+Baker · · Score: 5, Interesting

    Probably nobody uses DVD-Audio. The effort spent cracking the copy protection will be proportional to the popularity of the medium. When the DVD Audio section at your local record store is as large as the CD section, we may see some more time being spent on such things.

  2. Learn a lesson? by balster+neb · · Score: 4, Interesting

    Region coding on DVDs has caused enough headaches for people. The idea of having DVD audio disks that don't allow ripping to your computer is idiotic.

    CSS for DVDs didn't stop ripped DVD movies being downloaded by millions. Why does the recording industry think that some new encryption scheme will stop music pirates? All such encryption does is make the lives of legitimate users hard.

  3. It's a start... by MynockGuano · · Score: 4, Interesting

    So, rather than try to compromise the DVD-Audio's encryption itself, someone has succeeded in making a patch that uses WinDVD to perform the decryption and playback, but instead pipes the decrypted audio output to the hard drive instead of the sound card.

    While certainly useful for WinDVD users who aren't able to do this natively (guessing that Windows can't do this redirection natively, hence the news story), this is really "circumvention" at its most basic level. Well, almost...one step up from sticking a tape recorder next to your speakers. Not quite the "fair use" that will "break open" the DVD-Audio market that many posters will no doubt clamor over, and nowhere near a true solution to the problem.

    And to those familiar with this patch: Is the output even in a standard format capable of more than two channels?

  4. Protest agasint the format by WindBourne · · Score: 4, Interesting

    Plain and simple, the format allows the companies to disable your machine. Not only are they trying to control the music that you buy, but now they are wanting to control your machine.

    Funny thing is, that kids today can control the industry as they are the main buyers of the music.

    --
    I prefer the "u" in honour as it seems to be missing these days.