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.