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Research on Security Decision-making of Information System Based on FTA-AHP Model

Author: XuJinYi
Tutor: ChenYingWu
School: National University of Defense Science and Technology
Course: Management Science and Engineering
Keywords: Information system Security Policy decision Fault Tree FTA Analytic hierarchy process AHP
CLC: TP309
Type: Master's thesis
Year: 2003
Downloads: 208
Quote: 0
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Abstract


Network technology has laid the basis of the information age, but also left a security risk. The original designers of the Internet did not think in today Shortly thereafter, the tentacles of the Internet to extend to every corner of the world. However, it is worrying: the designers of these initial concern is the open and interconnected, they did not consider security. In addition, more and more complex software systems, security vulnerability has been discovered and faster speed, and a small security vulnerabilities exploited by a \With the increasing social dependence on information systems, security became a common occurrence, the security of the system caused a great deal of attention to security industry came into being. Various security threats faced by information systems, security technology and security products continue to produce; new security theory to emerge. Information system security solution is based on a certain security theoretical model, the security technology used to achieve its \threat to confront an organic whole. \Its concrete realization of ways for a single security product, it can be a huge security system. The blindly decisions may lead to extreme outcomes occur: not achieve the desired security objectives, or cause a great waste of safe investment. Thus, it is particularly important for the security of information systems investment decision analysis. Reliability theory in the fault tree analysis (FTA) technology is an effective means of reliability and safety analysis of a system, especially to solve the problem of complex systems analysis, this paper focuses on. FTA technology is applied to the information system, through the construction of system fault tree, so that the management of information systems (often at the same time is a security decision-makers) more clearly the causes of system failure; concerned about the failure event (top event), you can find the cause failure occurs all the minimal cut sets; According to the estimation of the probability of the basic events, you can find the probability of occurrence of the top event. Risk Evaluation combination of fault events can be estimated risk of security of information systems. Take safety program will reduce the probability of occurrence of an event of some substrates, thereby reducing the probability of occurrence of the top event and system security risks, the expected safety benefits obtained through the implementation of the security program. Analytic Hierarchy Process (AHP) quantitative and qualitative analysis of the combination of multi-objective decision making approach, information systems security solutions for key indicators such as the amount of investment, the safety benefits, investment / benefit ratio as a criterion; judgment matrix Central Plains subjective twenty-two comparison derived from the ratio of the replaced by objective calculated results of two compared to reduce errors caused by subjective judgments easy on the link. To just the decision makers to make subjective judgments on the relative importance of the criteria, effective security decisions can be completed multiple security programs. How the FTA technology applications with the field of information security, the establishment of security effectiveness of the program evaluation model; and how to make effective decisions according to the the benefit evaluation results and safety investment purposes, the composition of the program, product selection and the choice of the program, this study The major problem.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality
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