Research On Key Technologies Of Security Situational Assessment For Airport Information Systems

With the increasing daily of civil airport network traffic in our country, bringing huge gains, but also bringing more unsafe factor to airport. So that airport insecurity have attracted a lot of concern in many fields. In recent years, after continuous efforts multidisciplinary scholars, situation aessessment and forecast have become an important theoretical tool of detecting network security problems and forecasting the development trend of the security situation, and have made considerable progress. Apply the technology to research airport information system security, which can be more effective to provide real-time security situation and development trend of system for senior leaderships or administrators. So that management personnel can timely detect the abnormal events in the system, reduce risk and enhance security capability of airport information system.Based on the theory of secority siuation assessment and forecast, combined with the features of large-scale, complex structure and information exchange frequent of information system, the article uses modeling and simulation methods and studies the methods of assessing and forecasting security situation of airport information system. The main works are as follows:(1) Establishing airport information system security evaluation index system. Based on the analytic hierarchy process theory, combined with the characteristics of airport information system, starting from three aspects of the basic operation,vulnerability and threat,this paper establishes the evaluation index system and multi-level.(2) Establishing evaluation index weights and quantizating the index value. This paper uses fuzzy hierarchy analysis method to calculate the index weight value.When constructing the fuzzy judgment matrix, the importance between the index caused by the experts of different levels, different experience does not satisfy the order of transfer or compatibility index does not meet the consistency problem,we proposed a new correction algorithm.The anti-truth experiments show that the improved method can be more objective and accurate determination of index weight.(3) Assessing security situation of airport inforamtion system. In this paper, using the method of fuzzy comprehensive evaluation, by building the airport information system security situation assessment index system to confirm theory domain, to determine the index weight and evaluation level, to set up the fuzzy membership relations method to calculate the information system security situational values, and finally by situational value reflects thecurrent airport information systems security.(4) Real-time forecast future trend of information systems security. Based on grey theory of small samples, low consumption and good short-term prediction effect and other characteristics and using the markov chain correction grey forecasting model of random problems such as low volatility, and solved the problem traditional model can not real-time prediction.