Abstract: Network security situation is a hot research topic in the field of network security.The now-existing research is more concerned about the assessment of the current situation,but has little discussion about the future trend predictions.An improved grey Verhulst model was put forward to predict network security situation accurately in the future.Aiming at the shortages in the prediction based on traditional Verhulst model,the adaptive grey parameters and equaldimensions grey filling methods were proposed to improve the precision.The results show that the model is valid.

Key words: Situational awareness,Situational prediction,Grey model,Grey parameters