Research On Evaluation Method Of Information System Of Classified Protection Based On Dempster-Shafer Theory

Information systems of classified protection evaluation work is the protection of information systems class, one of the five required dives, is the protection of information security level of an important part. Level measurement result is not only the information system meets the basic requirements of the evaluation criteria, the national information security and regulatory authorities of the technical basis for the administration according to law.By analyzing the preponderance of evidence method, found some ways less than preponderance of the evidence presented in this paper based on DS evidence theory of information system-level decision method of measurement results can be expected improvements in the following aspects:First, put forward a relatively scientific data model evidence on the integration of a large number of measurement, so that measurement results can be quantified; Secondly, the use of expert system evaluation to determine the credibility of the evidence to reduce staff due to the subjective evaluation of knowledge and experience to bring the level of uncertainty; and finally, to find a Safety Management Evaluation for evidence-handling methods.In this paper, the following aspects of work:1. Comprehensive national level to protect the relevant standards, analytical grade evaluation of the various factors, the establishment of a multi-stage comprehensive evaluation system, and the use of expert scoring for each factor gives a certain weight.2. DS evidence theory is proposed based on the information the results of system-level evaluation decision model, on the evidence gathered be processed by the relevant Yasuko items and the overall conclusions of the evaluation.3. Through the various items of the results of the system are given in security technology and security control in the direction of rectification proposals.4. The model proposed in this paper the results of handling methods are compared with the preponderance of the evidence and found that this method results in the ruling on the scientific nature of certain improvements, especially in the management of evaluation in improving the scientific nature of the survey results, and conclusions in the evaluation consistent with the degree is given a probability value, is conducive to the second evaluation, each of the vertical comparison evaluation projects can serve as a safe basis for the rectification of a judge.