## 4 Solution of Requirements and Inspection Methods
### Active Defense Mechanism Enhances Broadband Network Resilience  
In employing a backup mechanism primarily reliant on asynchronous orbit satellites, the distinct characteristics and maturity differentials of asynchronous orbit satellite domains pose significant challenges in selecting defensive and combat methodologies. In more mature domains, implementation is directed toward ground-based stations and user terminals:  
* Detection: The implementation of malicious file analysis, network traffic analysis, user behavior analysis, and platform monitoring to identify potential malicious threats within low Earth orbit satellite domains. * Isolation: Implementing program isolation measures, executable whitelists, blacklists, etc., to develop zero-trust mechanism scenarios suitable for asynchronous orbit satellite domains. Furthermore, critical service servers are redundantly backed up to the cloud. Through satellite communication coupled with heterogeneous network connections to the international cloud 5G core network, significant changes and innovations have been brought to communication. The deployment of threats and vulnerabilities in the 5G cloud infrastructure also presents substantial challenges, such as malicious network actors successfully exploiting vulnerabilities to gain initial access to the 5G cloud system or launching attacks against individual cloud resources, triggering a chain reaction affecting the entire international cloud 5G core network. Distributed denial-of-service (DDoS) attack incidents, among others, are security concerns that need to be considered in the development of satellite communication networks and the deployment of international cloud 5G core network system architectures, ensuring, in extreme scenarios, that the transmission of our country's critical information is not compromised or leaked. Traditional passive cybersecurity monitoring and management measures in predefined environments and application domains are insufficient to address the threats of high-speed network environments with seamless integration across land, sea, and air networks. This paper will pivot toward proactive cybersecurity defense practices, constraining damage within manageable limits. This study implemented a zero-trust data protection mechanism in the cloud network space to strengthen the delineation of trust and responsibility boundaries, protect information and data security at the source, progressively develop widely accepted network resilience frameworks, and advance the realization of digital resilience goals, thereby fortifying our country's digital resilience. 1. Asynchronous Orbit Satellite Cybersecurity Architecture  
Wireless signal user threats refer to signals being subject to eavesdropping attacks, signal injection attacks, and signal spoofing during transmission by third parties. Ground system threats refer to satellite software and hardware typically adhering to an open-trust model, wherein ground stations are trusted by all equipment on the space station. The satellite ground station acts as a crucial bridge between the primary terrestrial network and the satellite, susceptible to hardware backdoors and physical access risks. Space platform threats encompass situations where sensor and RF system data are inadequately handled, or where there are hardware vulnerabilities in ground stations, making them susceptible to DDoS attacks, hardware backdoors, or malicious program attacks [44; 45], as depicted in Figure 31.  
To ensure the redundancy of critical service servers, they are backed up through satellite communication combined with heterogeneous network connections to the international cloud 5G core network, bringing about changes and innovations in communication. The threats and vulnerabilities in the deployment of the 5G cloud infrastructure also face significant challenges.