M2D2TF: A Multi-dimensional and Multi-directional Trust Model for Federated Identity Management

Since the requirements of task cooperation become more complicated and dynamic, the Federated Identity Management (FIdM) should be more safe and flexible to allow and facilitate participating federated organizations, to share information and grant or deny service access requests. Trust is the base of forming federation, and it's a novel idea to establish a security mechanism based on trust for a fair interacting environment. This paper analyzes the various trust needs in the context of FIdM, and designs a common trust model based on multi-dimensional vector which can apply to quantify multi-directional trust. At the end of essay, we present the calculation process of an example and analyze the results.