Abstract: [Purpose/Significance] With the popularization of artificial intelligence technology, the cost of information fog has decreased, and its negative impact on national security is becoming increasingly apparent. Information fog not only creates cognitive barriers for users, but also poses serious challenges to various fields such as politics, economy, and society. This article explores the prevention and control of information fog from the perspective of the overall national security concept, with the aim of addressing the risks and challenges posed by information fog. There is a lack of research in the literature on the prevention and control of information fog from the perspective of overall national security. To fill the gap, this article not only provides a new perspective and strategy for the prevention and control of information fog, enriching the connotation of national security research, but also promotes the cross-integration of information security and national security disciplines, providing new theoretical support for research in related fields. It provides reference and guidance to relevant entities such as the government and online platforms in preventing and controlling information fog. [Method/Process] Based on the concept of overall national security, this article summarizes the academic achievements on information fog at home and abroad, including research on stages, scenario applications, governance strategies, and practical case analysis. We summarize the characteristics of information fog and analyze the methods and strategies for prevention and control. [Results/Conclusions] Information fog has the characteristics of wide dissemination, realistic experience, and difficulty in identification. Based on this feature, the article puts forward the following suggestions to strengthen the improvement of legal policies and clarify the division of responsibilities: 1) to strengthen the evaluation and risk warning of online accounts and utilize technology to update anti-counterfeiting tools and improve information authentication capabilities. Governments should intervene in a timely manner to prevent the information fog from escalating. 2) to improve public awareness of discrimination and the level of prevention. In addition, the article also has some shortcomings. First, it does not present other forms of information fog in the security domain. Second, it does not analyze information fog from an algorithmic perspective. Therefore, in future research, we will closely follow the development of society to analyze the characteristics and presentation methods of information fog in various security fields. At the same time, scholars in the fields of computer science, intelligence science, and national security are also invited to conduct in-depth analysis of information fog from the perspective of computer algorithms, in order to propose practical countermeasures and suggestions for preventing and managing information fog from a technological perspective.

Key words: overall national security concept, information fog, national security, prevention and control research, intelligence work