Information system security situation assessment method based on fuzzy Petri network

Abstract

The invention discloses an information system security situation assessment method based on a fuzzy Petri network. The method comprises the following steps: constructing an information system securitysituation evaluation index system; establishing a fuzzy Petri network model; obtaining an expert evaluation result; calculating the credibility of a library; obtaining an initial state matrix; iteratively calculating a state matrix; and obtaining the security level of the qualitative information system. The information system security situation evaluation method based on the fuzzy Petri network has the beneficial effects that the method has a visualized graphic structure; uses a Pythagorean fuzzy set for describing the evaluation indexes so as to achieve a wider expressible range and better description capacity for the evaluation indexes compared with a traditional fuzzy set and an intuitionistic fuzzy set; and has reasonability, can avoid repeated triggering of the same transition by setting judgment on transition equivalent input, and thus guarantees that a security situation evaluation result is obtained in limited iteration times.

Description

technical field [0001] The invention belongs to the technical field of information system security, in particular to an information system security situation assessment method based on fuzzy Petri net (fuzzyPetri net, FPN). Background technique [0002] In recent years, the information technology industry has developed rapidly, and information systems have been widely used in science, industry, commerce, military affairs, production and other fields, and have gradually penetrated into all aspects of society, becoming an important part of my country's information construction. However, at present, some key technologies such as some core devices and hardware and software of my country's information system are not yet fully mature, which may become the resistance and hidden danger of my country's information construction. At present, the main issues that restrict the functioning of information systems and threaten the security of information systems have changed from technical ...

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Problems solved by technology

Although these methods provide a reference for information system security construction and management decision-making, there are still certain problems. Among them, the evaluation method based on mathematical models cannot well meet the reasoning requirements in terms of prior knowledge modeling and reasoning; while the evaluation method based on deep learning The evaluation method lacks a more intuitive graphical structure in the process of model expression; the evaluation method based on probability knowledge does not take into account the fuzzy factors and algorithm complexity in the evaluation in the data collection

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