Software security is an important quality aspect of a software system. Therefore, it is important to integrate software security touch points throughout the development life-cycle. So far, the focus of touch points in the early phases has been on the identification of threats and attacks. In this paper we propose a novel method focusing on the end product by prioritizing countermeasures. The method provides an extension to attack trees and a process for identification and prioritization of countermeasures. The approach has been applied on an open-source application and showed that countermeasures could be identified. Furthermore, an analysis of the effectiveness and cost-efficiency of the countermeasures could be provided.
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