TAN Zhiyong, LIU Duo, DAI Yiqi, “Availability Evaluation Method andImplementation Framework of MultilevelSecuerity Systems with CredibilityCharacteristics,” Chinese Journal of Electronics, vol. 19, no. 1, pp. 61-65, 2010,
Citation:
TAN Zhiyong, LIU Duo, DAI Yiqi, “Availability Evaluation Method andImplementation Framework of MultilevelSecuerity Systems with CredibilityCharacteristics,” Chinese Journal of Electronics, vol. 19, no. 1, pp. 61-65, 2010,
TAN Zhiyong, LIU Duo, DAI Yiqi, “Availability Evaluation Method andImplementation Framework of MultilevelSecuerity Systems with CredibilityCharacteristics,” Chinese Journal of Electronics, vol. 19, no. 1, pp. 61-65, 2010,
Citation:
TAN Zhiyong, LIU Duo, DAI Yiqi, “Availability Evaluation Method andImplementation Framework of MultilevelSecuerity Systems with CredibilityCharacteristics,” Chinese Journal of Electronics, vol. 19, no. 1, pp. 61-65, 2010,
| To evaluate and choose proper credibil- ity evaluation functions and credibility threshold parame- ters in the Multilevel security (MLS) system based on the CBLP model which was proposed in the authors' previous paper, we devised a sampling statistics method to evalu- ate the availability of the MLS system, by obtaining the change curve of the subjects' credibility and the rejection ratio of access operations. The validity of this method was evaluated according to the strong law of large numbers and the central limit theorem. The analysis of speci¯c scenarios showed that the result of the sampling statistics method is highly consistent with that of the formal analy- sis methods. Then an implementation framework based on the availability evaluation method is proposed. Since it is hard to evaluate the availability of the system completely by formalization analysis, the sampling statistics analysis method can provide an important reference for the e®ec- tive implementation of the CBLP system.