I. Introduction
China's national e-government Extranet government cloud platform has provided a unified, safe and on-demand infrastructure environment and technical support services for the central government departments, initially forming an intensive development pattern of e-government construction. China's government cloud has basically formed the front desk is “Internet + government service”, and the background is the application mode of data resource technology support. Based on the deep application of government cloud truly realizes “data run more, and people run less errands”. In the face of the current complex and volatile international situation and cyberspace environment, the construction of digital China, especially the digital government, will face a more severe security situation, and the construction of network security system and related security capabilities will become the key to support the stable and healthy operation of the digital government [1].