Evaluation for network security based on the Read-Write transition model

The evaluation of network security is a hot issue in present research of network security. After acquiring each host´s confidentiality, integrity and availability evaluation index by attacking the network, we can directly evaluate the network security. But, for the network with Read-Write management privilege setting to the root directory, it is necessary to execute the state transition of the security attribute value by reason of the existence of root directory Read-Write relationship. Firstly, the Read-Write transition model and correlative concepts are presented for the root directory with Read-Write privilege setting; then the model transition function is formalized by the state transition arithmetic operator ⊙. Based on the transition model, we have designed the network security state transition machine and the network security evaluation model. Finally, the method´s feasibility and validity are verified by practical example analysis.