Abstract: Node trust reflects behavior and ability of a node against another node in the network. This article first ana- lyzed the research status of trust model now. The algorithm design for node trust model is based on the research of local trust, recommendation trust, comprehengsive trust. The theory of probalbility knowledge was introduced to calculate nodal credible degree. This method in a variety of factors influencing the node trust, the identity authentication technolo- gy design and degree algorithm and degree algorithm was designed and realized.

Key words: Node, Trust, Certification, Design