A Layered Decision Model for cost-effective system security Online publication date: Wed, 01-Oct-2008
by Huaqiang Wei, Jim Alves-Foss, Terrence Soule, Hugh Pforsich, Du Zhang, Deborah Frincke
International Journal of Information and Computer Security (IJICS), Vol. 2, No. 3, 2008
Abstract: System security involves decisions in at least three areas: identification of well-defined security policies, selection of cost-effective defence strategies, and implementation of real-time defence tactics. Although choices made in each of these areas affect the others, existing decision models typically handle these three decision areas in isolation. There is no comprehensive tool that can integrate them to provide a single efficient model for safeguarding a network. In addition, there is no clear way to determine which particular combinations of defence decisions result in cost-effective solutions. To address these problems, this paper introduces a Layered Decision Model (LDM) for use in deciding how to address defence decisions based on their cost-effectiveness. To validate the LDM and illustrate how it is used, we used simulation to test model rationality and applied the LDM to the design of system security for an e-commercial business case.
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