A study of pollution on BitTorrent

P2P pollution technology has been used to control the unauthorized distribution of the copyrighted files in recent years. In this paper, two 2 kinds of P2P pollution, the index poisoning and the fake-block-attack, has been discussed. The experiment result of applying them to BitTorrent shows that the effect of controlling file distribution is not satisfactory under some conditions. In order to improve the effect and the applicability of the pollution, an approach which combines the characteristics of the index poisoning and the fake-blockattack is proposed. The evaluation of applying this approach on BitTorrent shows that the robustness of the BitTorrent swarm is damaged and most peers can not complete the downloading even though the attack is not distributed to every downloading peer evenly. The effect of this approach is better than the effect of the index poisoning and the fake-block-attack.