Following the launch of a new generation of high-speed 5G mobile networks, the highly anticipated innovative network applications and Internet of Everything (IoE) will gradually become reality. The operational flow of the world will further integrate with the Internet. As a result, 5G networks must shoulder the greater responsibility in terms of operational safety or resilience. 5G network security is not just an issue of telecommunication, but also a requirement of national security. Thus, 5G security issues must be explored as soon as possible.