## 4 Results
### Stage Topic Recognition
#### 4.1.2 Technical Topic Recognition
Meanwhile, advanced threat defense (\"Malware Detection\", \"Malicious Code Addressing\", \"Intrusion Detection and Resource Protection\") and mobile terminal device security (\"Mobile Device Security\", \"Network Content Security Control\") remained the focus of patent technology research and development. * Stage 6 (2015-2016). During this stage, the rapid development of cloud computing continued to bring new security challenges, and security defense technologies at the server and terminal device levels still received close attention from developers. Specifically, this stage included the topics of \"Server Based Malicious Code Detection and File Protection\" and \"Terminal Device Security\". Meanwhile, with the outbreak of the Prism Gate incident, advanced persistent threats and ransomware attacks became more complex and diverse, leading to frequent data breaches. Developers began to intensify their research efforts on authentication technology, traffic analysis, and response management techniques. Specifically, they included topics such as \"Network Security Authentication\", \"Network Traffic Strategy\", \"Domain Name and Content Security Detection\", \"File and Image Security Risk Analysis\", \"Security Event Response and Resource Management\", and \"Malicious Message Detection\". * Stage 7 (2017-2018). During this stage, cloud computing and edge computing achieved large-scale deployment, driving the transformation of enterprise networks towards a distributed architecture. Developers focused on the research of distributed collaborative defense and threat intelligence perception technologies. Specifically, they included topics such as \"Distributed Cybersecurity Resource Management\", \"Remote Control and Dynamic Network Topology Security\", \"Real-Time Threat Detection\", and \"Multimedia Threat Detection\". Meanwhile, with the rapid development of the Internet of Things and Internet of Vehicles technologies, technological topics such as \"Vehicle Networking and Communication Identity Authentication\", \"Terminal Device Storage Security\", and \"Security Management for IoT Devices\" emerged, indicating that a new infrastructure security architecture was gradually being constructed. * Stage 8 (2019-2020). In this stage, following the development trend of the previous stage, there was an explosive growth in IoT devices, with their security technologies advancing further. This specifically involved topics such as \"Embedded System Protection\" and \"Node Collaborative Defense\". Meanwhile, with the emergence of COVID-19, there was a surge in demand for remote work and cloud services, accelerating the transformation of the zero-trust architecture concept (\"Communication Security and Service Authentication\") into technological practice. The application of artificial intelligence technology in the field of cybersecurity became increasingly prevalent and gradually became deeply integrated into the entire process of threat defense. This specifically included topics such as \"Malicious Software Detection Technology Based on Multidimensional Feature and Behavior Analysis\" and \"Terminal Threat Response\". Stage 9 (2021-2022). In this stage, the impact of COVID-19 continued, and the application of AI in threat detection (\"Network Attack Monitoring\") became more sophisticated. Meanwhile, hardware security (\"Hardware Security Module for Network\"), and zero-trust architecture (\"Security Detection and Defense of Terminal Devices\", \"Network Node Vulnerability Management\"), and other related technologies continued to attract the attention of developers. Furthermore, as more enterprises migrated to the cloud, \"Cloud Storage Security\" became a key focus area for researchers. * Stage 10 (2023-2024).