In order to strengthen the security of P2P networks, it is necessary to build trust relationships between nodes of
networks. However, the traditional trust evaluation models can't resist the attacks of Pseudospoofing and Pseudostheft
effectively. To resolve the problems, in this paper, the trusted computing method is introduced into P2P networks, and an
idea of group trust model based on trusted computing methods is proposed. In the process of trust evaluation, the model
can realize the anonymous attestation of the node body, which improves the creditability of trust relationships between
nodes and resolves the security problems of P2P networks.