Method of Determine Index Weight in Security Risk Evaluation Based on Information Entropy

Weight reflects the essentiality of an index in index volume. Presented a method of determine index weight in security risk evaluation (SRE) based on information entropy. It is a kind of structure analysis method, which constituted entropy model for security risk evaluation of information system and defined subjection function in the first instance, shaped subjection degree matrix of experts´ ideas via idea collection and expert compositor, and then introduced average cognitive degree and cognitive bind degree, eliminated experts´ indetermination of cognition in compositor phases. In the end, gained vector quantities of weight via normalized. The method of determine index weight based on information entropy puts forward a new method to determine index weight in security risk evaluation.