Macrovision Music CD protection (safeaudio)(macrovision er fyrirtækið sem gerir vörnina á dvd diskana líka) hefur verið krökkuð, aðeins nokkrum vikum eftir að fyrstu diskarnir með þessu voru gefnir út.

Þetta átti að stoppa fólk frá því að spila diskana í tölvum og rippa sem mp3 eða eitthvað annað format.

Það mistókst :>

Um hvernig þetta var krakkað:
The bypass, highlighted by European Web site CD Freaks, converts the disc tracks to .wav files in RAM and mounts them as readable volumes. At that point any .wav app can handle the rip. The bypass uses a custom VXD virtual device driver file. ®

Um vörnina sjálfa:
SafeAudio essentially corrupts the data on the CD. Hi-fi CD players' error correction systems can cope with the bursts of noise added to the music, so the listener remains - allegedly* - unaware there's anything they're hearing anything but a perfect sound reproduction. The error correction system treats the noise as just one more result of the inherently noisy environment, thanks to high disk speeds, grubby disk surfaces and frequent laser mis-reads, that all CD players are. Listen to an audio CD with error correction switched off and you'll hear little more than hiss.
PC CD drives, on the other hand, require the mediation of a controller application, which treats all this extra noise as corrupt data and trigger a read failure. That, reckons Macrovision, renders SafeAudio discs unrippable. Every time you try to do so, you're told that the data has been damaged and the copy has been aborted.


Mér finnst þetta ekki meika sense.. Þeir eru að refsa þeim sem actualy kaupa diskana.. ekki þeim sem downloada.. :)


Heimildir; TheRegister,
http://www.theregister.co.uk/content/54/20766.html