“…As the network develops rapidly [1], people's living standards have gradually improved [2], and the growing scale of the network and the more and more complex network environment has led to a higher frequency of security problems, which greatly challenges the integrity and confidentiality of network data [3]. Although there are many security measures, such as firewalls [4] and anomaly detection [5], none of them can provide a systematic and holistic perception of the network, discover the problems and solve them, which leads to the emergence of Network Security Situational Awareness (NSSA) [6]. NSSA can fuse all available information to assess the situation of the network, provide network administrators with relevant decision bases, and minimize possible risks and losses, which is important for improving the monitoring capability and responsiveness of the network.…”