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Old 06-12-2005, 09:33 AM  
kernelpanic
Too lazy to set a custom title
 
Join Date: Jan 2005
Posts: 2,961
This is how limewire determines "unique" files:
http://en.wikipedia.org/wiki/SHA1


Many p2p apps use this or another algorithm (md5), which are both collision resistant enough from a spammers perspective to be considered identical.
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