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DateThu, 02 Feb 2006 18:40:27 +0100
From(Emilio Jesús Gallego Arias)
SubjectRe: GPL V3 and Linux - Dead Copyright Holders
Linus Torvalds <torvalds@osdl.org> writes:

> Besides, the people who inserted the DRM code explicitly gave you 
> permission to modify it, so the whole point is moot. There's no 
> "circumvention".

Yes, it is mostly clear, and indeed GPL3 seems a little bit over
engineered, but that doesn't mean that GPL2 could not have any
loopholes:

1. Release a kernel with builtin DRM for video. (For example HDCP [1])
   Such DRM implementation is released under the GPL2 by copyright
   holder A.

2. Distribute a modified kernel without DRM. Copyright holder A gave
   you permission to do so, by the GPL2, everything is OK.

3. People can backup videos from copyright holder B using the modified
   kernel.

4. Copyright holder B can sue you under the DMCA, for circumventing an
   effective technological measure. It doesn't matter whatever license 
   copyright holder A gave you.

Regards,

Emilio

Footnotes: 
[1]  High-Bandwidth Digital Content Protection. Currently you would
never get a license for a GPL implementation, but it's used as an
hypothetical example.

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