Fighting pollution in P2P live streaming systems

Peer-to-peer live streaming media systems are becoming more popular each day. As in file sharing P2P system, they are susceptible to content pollution attack. In this kind of attack, a peer alters the media content decreasing the perceived quality of the streaming. In this paper we evaluate the impact of pollution attack in P2P live streaming and we present two reputation system to avoid content polluted dissemination and isolate malicious peers. Our results show that a few number of polluters is capable to compromise all the application and the 2 proposed reputation systems can quickly identify and isolate polluters and also be resistant to peers collusion.