TAN Zhiyong, LIU Duo, DAI Yiqi. Availability Evaluation Method andImplementation Framework of MultilevelSecuerity Systems with CredibilityCharacteristics[J]. Chinese Journal of Electronics, 2010, 19(1): 61-65.
Citation: TAN Zhiyong, LIU Duo, DAI Yiqi. Availability Evaluation Method andImplementation Framework of MultilevelSecuerity Systems with CredibilityCharacteristics[J]. Chinese Journal of Electronics, 2010, 19(1): 61-65.

Availability Evaluation Method andImplementation Framework of MultilevelSecuerity Systems with CredibilityCharacteristics

  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2010-01-05
  • | 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.
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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