Research On Trust-Based Dynamic Network Access Control

With the rapid development of computer technology, communication technology and network technology, the security of computer systems get more and more attention. As an important security technology, Access Control has been permeating into the operating system, database, and network. Compared with the traditional discretionary access control and mandatory access control, Role-based Access Control Model (RBAC) as a mainstream access control model has greater flexibility and extensibility. Besides, Researchers have raised a number of role-based access control models, including the famous family of RBAC96 model. However, these models are single and based on static identity authorization mechanisms of trust. With the process of in-depth information network, the unitary and static approach of authorization have been unable to meet some requirements in terms of security, and also, with the number of users and system size increased, maintenance and management of the user's permissions has greatly increased the burden on administrators.On the basis of role-based access control (RBAC) model, this paper introduces the concept of property, increases the confidence of a set of user's behavior and creates a Dynamic Role Based Access Control (TDRBAC) model based on the trust evaluation of user's behavior. First of all, this paper gives a brief introduction of the current access control technology, including the traditional mandatory access control, discretionary access control and the current rapid development of the role-based access control technology. Then TDRBAC model is defined in detail. Meanwhile, it analyzes the dynamic nature of trust mechanisms, the role of the volume and performance superiority of the model. The model named RBAC96 is based on the dynamic properties and a collection of user behavior trust. The trust evaluation model of user's behavior is established. The trust evaluation system mainly provides functions of calculation of user's confidence and updating user's confidence. Based on the model of the RBAC96, TDRBAC adds dynamic properties and a collection of user confidence.Finally; TDRBAC-based access control system is designed.