The research based on trust value against vulnerability in P2P networks

Due to the existence of hubs in P2P networks, the network becomes more and more vulnerable because of great reducing in defending against coordinated attacks. This paper propose a model based on trust value of nodes against vulnerability, which not only takes into account the node´s connections, but also gives full consideration about the node´s trust value, and the calculation of trust value is broken down to various types of the resources. In accordance with the type of pre-transaction resources, selects nodes that have higher trust and fewer connections to make transaction. Simulation proves that this model can avoid generating hubs effectively, improve the ability to defend against coordinated attacks, and also enhance the network robustness and stability.