Abstract
Industrial Internet of Things (IIoT) is vulnerable to Advanced Persistent Threat (APT). This paper studies a scenario in which APT is launched to attack IIoT devices. Considering the APT's lateral movement, a node-level state evolution model is established to calculate the probability of every device in an IIoT system to be compromised by APT. Based on this, a Stackelberg game model is proposed for the APT attacker and defender, which can accurately describe the gaming process. An effective computational approach is developed to obtain the potential Stackelberg equilibrium strategy pair of the game. Extensive case studies and comparison studies are conducted to validate the effectiveness of the proposed method.
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