Abstract: This paper analyses the problem of file pollution on P2P file sharing networks, presents various kinds of pollution techniques, and puts forward possible counter-measures to them. In particular, a novel cooperative “warning-delete” approach is proposed to alleviate the most serious version pollution. The effectiveness of this approach is proved by simulation experiments.

Key words: P2P, file sharing, content distribution, file pollution

摘要： 借助仿真实验揭示了P2P文件分发与文件污染的规律，针对常用的污染手段提出了相应的对策。实验证明，文中提出的“提醒-删除”合作机制可以有效地增加污染的难度，降低污染的成功率，从而在一定程度上缓解了P2P网络中严峻的文件污染问题。

关键词: P2P, 文件共享, 内容分发, 文件污染

CLC Number: 

• TP393.08