thegrounds that Real had to break Apple DRM to accomplish this. The cartelthat runs licensing for DVDs can block every new feature in DVDs inorder to preserve its cushy business model (why is it that all you cando with a DVD you bought ten years ago is watch it, exactly what youcould do with it then -- when you can take a CD you bought a decade agoand turn it into a ringtone, an MP3, karaoke, a mashup, or a file thatyou send to a friend?).
DRM is used to silence and even jail researchers who expose its flaws,thanks to laws like the US DMCA and Europe's EUCD.
In case there's any doubt: I hate DRM. There is no DRM on thisbook. None of the books you get from this site have DRM on them. If youget a DRMed ebook, I urge you to break the locks off it and convert itto something sensible like a text file.
If you want to read more about DRM, here's a talk I gave to Microsoft onthe subject:
https://craphound.com/msftdrm.txt
and here's a paper I wrote for the International TelecommunicationsUnion about DRM and the developing world:
https://www.eff.org/IP/DRM/itu_drm.php
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