Cyberspace has gradually developed into the fifth strategic space after land, sea, air and sky, and is the core, key and foundation of national security, social stability, economic development and cultural dissemination. Cyberspace has the characteristics of openness, heterogeneity, mobility, dynamics, security, etc., and constantly evolves new network forms such as next-generation Internet, 5G mobile communication network, mobile Internet, Internet of Things, etc., as well as a lot of new service modes such as cloud computing, big data, and social networking.
Network security has become one of the world's hot research topics and has attracted widespread social attention. Network security is a systematic project and has become the primary task of informationization construction and application. Network security technology involves laws and regulations, policies, strategies, norms, standards, mechanisms, measures, management and technology, etc. It is an important guarantee of network security.
Information, materials and energy have become the three pillars and important guarantee for the survival and development of human society, and the rapid development of information technology has brought about profound changes in human society. With the rapid development of computer network technology, China has made remarkable achievements in the construction of networking, e-banking, e-commerce and e-government of the wide range of applications, so that the computer network has been y into the country's political, economic, cultural and national defense construction in all areas, throughout the modern information society, work and life at every level, "digital economy "and the integration of global electronic transactions are taking shape. Network security is not only related to national economy and people's livelihood, but also closely related to national security, not only involving all aspects of the country's politics, military and economy, but also affecting the country's security and sovereignty. With the wide application of informationization and network technology, the importance of network security is particularly prominent. Therefore, the most critical and most easily ignored security issues in network technology, is jeopardizing the healthy development and application of the network, network security technology and application of the world's attention more and more.
Network security is a multidisciplinary comprehensive interdisciplinary involving computer science, network technology, information security technology, communications technology, computational mathematics, cryptography and information theory, is an important part of computer and information science, but also in the last 20 years the development of emerging disciplines. It is an important part of computer and information science, and an emerging discipline developed in the last 20 years. It needs to synthesize the knowledge and research results in many fields, such as information security, network technology and management, distributed computing, artificial intelligence, etc., and its concepts, theories, and technologies are being continuously developed and improved.
With the rapid development and wide application of information technology, the connotation of network security is constantly expanding, from the initial development of information confidentiality to the integrity of information, availability, controllability and reviewability, and then developed into "attack (attack), defense (prevention), measurement (detection), control (control), management (management), evaluation (evaluation)". "and other aspects of the basic theory and implementation of technology.