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From Trust to Dependability through Risk Analysis

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4 Author(s)

The importance of critical systems has been widely recognized and several efforts are devoted to integrate dependability requirements in their development process. Such efforts result in a number of models, frameworks, and methodologies that have been proposed to model and assess the dependability of critical systems. Among them, risk analysis considers the likelihood and severity of failures for evaluating the risk affecting the system. In our previous work, we introduced the Tropos goal-risk framework, a formal framework for modeling, assessing, and treating risks on the basis of the likelihood and severity of failures. In this paper, we refine this framework introducing the notion of trust for assessing risks on the basis of the organizational setting of the system. The assessment process is also enhanced to analyze risks along trust relations among actors. To make the discussion more concrete, we illustrate the framework with a case study on partial airspace delegation in air traffic management system

Published in:

Availability, Reliability and Security, 2007. ARES 2007. The Second International Conference on

Date of Conference:

10-13 April 2007

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