Abstract
To access information system security risk assessment is very important even in presence of uncertainty of the system. In this paper, we propose a method of AHP/D-S evidence theory to handle the uncertainty of the system. Compared with other methods, the analysis of hierarchy process (AHP) method has been widely used in security risk assessment, for this method can change from the qualitative index into quantitative index. Realistic risk assessment involves many uncertainty factors, some of which are even unknown. Considering the Dempster-Shafer theory of evidence (D-S) which is able to treat those uncertainties very well, this paper proposed a risk assessment model which is generated by combining AHP method with D-S method to solve these problems. Not only does the AHP/D-S method combine the advantages of both, but also can solve uncertain problems more scientifically. Finally, a sample of how to use AHP/D-S method in security risk assessment is given to prove our method.
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