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On Combating Content Poisoning in Peer-to-Peer Networks

Poisoning attacks on Peer-to-Peer (P2P) networks are common nowadays. Poisoning refers to the condition in which malicious peers share corrupt or infected content in an attempt to destabilize the system and waste network bandwidth. By so doing, regular peers find less value in the P2P network and get discouraged from participating in the system. This problem can be thwarted by introducing mechanisms to verify the integrity of the downloaded content. However, this requires extra resources for such verification process. In this paper, we propose a strategy to minimize the threat of content poisoning, while requiring less verification overhead on the peers participating in the network.