Reputation System Fights P2P Junk

Many of the files that are shared on P2P networks tend to be junk. Organisations such as the RIAA and music labels regularly pollute these networks with nonsense files masquerading as real music or video files. These junk files make it difficult for users to find what they want on P2P networks. Some researchers at Cornell University have developed a reputation system called Credence, that works on the Gnutella network, allowing users to tell the good files from the bad ones