面向复杂工业环境的信息物理融合系统可靠性

针对恶意节点的攻击行为,提出了一种基于随机Petri网的概率模型,描述信息物理融合系统的入侵检测响应行为. 分析了入侵检测响应对信息物理融合系统可靠性的影响. 主要考虑连续性攻击、随机攻击和阴险攻击3种攻击行为,设置最优的检测强度和响应强度,平衡系统节能和入侵容忍. 实验结果表明:根据攻击强度和检测行为,调整检测响应强度,信息物理融合系统的可靠性最优. 

Reliability Research on Cyber-Physical Systems for the Complicated Industrial Environment

In view of the attacks of malicious nodes, a probability model based on stochastic petri net was proposed to describe the intrusion detection response behavior of cyber-physical systems. The influence of the intrusion detection response on the reliability of cyber-physical systems was analyzed. Considering the continuity attack, random attack and insidious attack, the optimal intensity of detection and the response intensity were set in order to balance the energy saving of systems and the intrusion tolerance. The results show that the reliability of cyber-physical systems is optimal by adjusting the detection response intensity according to the attack strength and the detection behavior.