That's *AFAIK* not possible, if this would be true the edonckey/emule protocol would have a big design flaw and poeple couldn't even trade millions of files every day, some (most?) downloads would be corrutped as they could have potentialy downloaded a wrong chunk which in fact is from another file.
I came across this discussion:
http://forum.emule-project.net/lofiversion/index.php/t25107-150.html
..."Thats the point of file hashes. Emule doesn't work with file names for anything apart from searches. It uses hashes. So they can say you have a file with the same name and hash as one on e.g. sharereactor. Now that makes it pretty clear that you are sharing the file (this is not conclusive but makes it very likley,see my above post). In a criminal case you might just get off (not beyond ALL resnable doubt) but in a civil case you are screwed. "........
The opportunity for collisions causes 'reasonable' doubt. With all the 100's of terabytes being shared on P2P, I would imagine it quite possible for a couple of hashes to match. (again, not concrete, but _possible_)
The problem is that such evidence admitted to court sets precedence for plausible matches (as opposed to innocent until PROVEN beyond reasonable doubt) to be presented as concrete fact. And I am not a P2P guy (except BitTorrents of Fedora and Debian), but I am concerned about this mindset for prosecution bleeding into digital signatures, encrypted emails (that they cannot encrypt but see a string that resembles the characters 'I did it' ).
Yeah, sorry about the analogies :)
http://www.domain-logic.com
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