关键词: Kad网络, 对等网, 关键词污染, 文件源污染, 联合污染模型, 状态转移

Abstract: In this paper, a joint pollution model, which combined the pollution of keyword and the pollution of location, was proposed. The degree of pollution, the rate of exit and the rate of waiting were taken into account in the model. The simulation results show that the quantity of user of querying failed is much larger than the quantity of user of querying successfully by the impact of joint pollution and become stable with time increasing. The degree of pollution is the key factor which influence the effect of the joint pollution, the effect of exit rate is smaller than the degree of pollution and the effect of waiting rate is the smallest.

Key words: Kad network, Peer-to-Peer (P2P), keyword pollution, file source pollution, joint pollution model, state transfer