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Advances, Systems and Applications

Table 2 The two-dimensional confusion matrices that define the main factors considered in IDS performance evaluation when predicting the anomaly and normal classes

From: Intrusion detection systems for IoT-based smart environments: a survey

   Predicting the anomaly class
   Attack Normal
Actual Attack α A β A
Class Normal γ A δ A
   Predicting the normal class
   Normal Attack
Actual Normal α N β N
Class Attack γ N δ N