DVD Jon is also responsible for developing work around for Apple's iTunes music service that allowed users to purchase music without the additional DRM protection and without having to use the iTunes software. However, the Norwegian is mostly known for his best work, which was his part in the creation of DeCSS, which effectively allows DVDs to be watched on Linux because it descrambles the Content Scrambling System (CSS) protection on a DVD disc.
However, since many adopted DeCSS to either copy their own bought DVDs or for piracy, his work landed him in a court battle with the MPAA which he eventually won.
Source:
The Register
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