Research On Dynamic Trust Model Of Evolutionary Games For Internetware

The development of Internet changes the runtime environment of software from static state to dynamic state, and this makes a new research area: Internetware. Internetware is built upon the coordination of the heterogeneous, autonomous software entities in the open coordination environment. But it is very difficult to select the honest coordination software entities with dependable quality of services to build the trusted Internetware because of the openness and dynamic of the Internet. Trust relationships among software entities will provide important information about the selections of trusted coordination entities. The trust relationships are always changing along with the cooperations of software entities. However, the existing trust models cannot support the automatic formation and update of the trust relationships among entities, and cannot reflect the dynamic attribute of the trust relationships.In this thesis, the characters and deficiencies of the recent researches on dynamic trust model of the large-scale distributed systems were summerized and analyzed. The trust activities of the internetware were researched utilizing the modeling thoughts. Meanwhile, a trust strategy and evolution model based on the evolutionary game theory was proposed, which was a new idea for the internetware credibility research.In this thesis, the evolutionary game theory was used into the progress of the Internetware dynamic trust-model research, and a new type of trust evolutionary game model based on the evolutionary game theory was proposed, which was applicable to Internetware. The model reasonably abstracted the choosing process of the trustworthiness of the Internetware, and promoted the effective evolutionary cooperation among the nodes by establishing the incentive mechanisms for cooperation to improve the overall security of the internetware system. The model emphasized the support to the trust relationship evolution, and provided a new idea to solve the problem of the trustworthiness of the Internetware. Finally, the model performance was got by the simulation experiments and experiments data analysis by formal verification.