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Herrmann, A. and Morali, A. (2010) RiskREP: Risk-Based Security Requirements Elicitation and Prioritization (extended version). Technical Report TR-CTIT-10-28, Centre for Telematics and Information Technology University of Twente, Enschede. ISSN 1381-3625
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Today, companies are required to be in control of the security of their IT assets. This is especially challenging in the presence of limited budgets and conflicting requirements. Here, we present Risk-Based Requirements Elicitation and Prioritization (RiskREP), a method for managing IT security risks by combining the results of a top-down requirements analysis with a bottom-up threat analysis. Top-down, it prioritizes security goals and from there derives verifiable requirements. Bottom-up, it analyzes architectures in order to identify security risks in the form of critical components. Linking these critical components to security requirements helps to analyze the effects of these requirements on business goals, and to prioritize security requirements. The security requirements also are the basis for deriving test cases for security analysis and compliance monitoring.
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