Network attacks occur in high proportion on the internet, thus aside from security as a means of defense there is a need for being able to detect attacks as they occur so that measures can be put in place to tackle them. In this paper, we focus on attack trees as a tool to model attacks thereby facilitating attack detection. More precisely, we present a unified parametrizable attack tree; this can be applied for intrusion detection and can be instantiated to produce particular types of attack trees in literature.

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