Abstract

AbstractTraditional network threat situational assessment is based on raw alerts, not combined with contextual information, which influences the accuracy of assessment. In this paper, we propose a method to quantitatively assess network threat situation based on not only alerts but also contextual information. It firstly verifies alerts by matching alerts with contextual information to determine the successful probability of attacks, then analyzes the impact caused by attacks according to the severity and the corresponding asset value of them, and finally quantitatively assesses network threat situation based on the successful probability and the impact of attacks. Case studies show that the method can assess network threat situations more reasonably. Copyright © 2016 John Wiley & Sons, Ltd.

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