A security metric for the evaluation of collaborative intrusion detection systems in wireless sensor networks

摘要: Objectively quantifying the classification accuracy of Intrusion Detection Systems (IDSs) is fundamental importance. Evaluation metrics have been proposed to measure effectiveness traditional IDSs, but none those seems suitable evaluate distributed collaborative IDSs that are generally employed in Wireless Sensor Networks (WSNs). This because WSNs each IDS output (i.e., alarm or absence alarm) results from a consensus decision among several nodes, as opposed an individual single node. In this paper, we present trust probability (P t ) metric, which defined draws right conclusion its decision-making process. metric computed based on properties nodes contribute global conclusions. We provide numerical examples well detailed analysis P . Moreover, show how can be used find best operating point given and compare different IDSs. Finally, since much should trusted, discuss real-time rank alerts.