The Construction And Research Of Trust Network Based On CPS Application Environment

With the rapid development of information technology and the Internet industry, the development and application of CPS is promoted. It is a high degree of integration of multi discipline, which involves many aspects such as cloud computing, big data, communication network, embedded systems and so on. Trustness is a very important factor in CPS environment, which is worthy of attention and research. As an extension of the Internet, the network environment has the same and different points. At present, most of the trusted models applied in the Internet environment, which is rarely involved in CPS. The paper studied the trusted network in CPS.The paper studied the centralized and distributed trusted network models, and analyzed the characteristics and application environment of two kinds of trusted models. According to the specific environment of CPS, three kinds of trusted network models are proposed, which is center control trusted network model, link trusted network model, center related trusted network model.The application environment of the center control trusted network model is mainly in the environment of the need trusted organization. The paper proposed the consideration factors of trusted evaluation based on SERVQUAL and considered differences between subjectivity and objectivity of the data. The paper introduced the D-S Evidence Theory which decreased the influence of subjective factors. Finally the paper gave the final result of the trusted evaluation value by weight calculation. The example proved the feasibility of the method.The application environment of the link trusted network model is mainly in the environment which the network had a considerable number of trusted evaluation value between different nodes. The demand node and target node can form the trusted value link between the two nodes through other nodes. On the basis of the current research on the trusted relationship, this paper gave the optimization rule of the value link, and gave the trusted evaluation value of the demand nodes between target node. T he example proved the feasibility of the method.The application environment of the center related trusted network model is mainly in the environment which the network had a lot of historical data between nodes and center nodes, and how to determine the center node trusted value for a new node. As an example of specific environment the paper gave the optimization algorithm of the trusted network. The superiority of the method is proved by the example.