Research of the trust model in P2P based on ranked feedback mechanism

In Peer-to-Peer networks, there is no trustworthy central-point, so nodes can´t build the trust relationship between each other. To resolve this problem, paper gives a trust model based on ranked services feedback mechanism, which references the blur theory, takes account of real qualities of all aspects of the network services, and divides all services to different ranks. In this model, different rank has different weights, and also the time relativity and punishment mechanism are introduced, so the accuracy and sensitivity are improved. At last the simulation system proves that this model has advancement compared to traditional models.