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The importance of network security
2 1 century, wITh the rapid development of information construction and it technology, the application of various network technologies is more extensive and in-depth, and at the same time, many network security problems have emerged, making the importance of network security technology more prominent. Network security has become the focus of attention in all countries, which is not only related to the information resources and asset risks of institutions and individual users, but also related to national security and social stability, and has become a new field of hot research and talent demand. We must take effective measures in law, management, technology and ethics to ensure the stable development of network construction and application.

Cyberspace has gradually developed into the fifth strategic space after land, sea, air and sky, and it is the core, key and foundation that affects national security, social stability, economic development and cultural communication. Cyberspace is characterized by openness, heterogeneity, mobility, dynamics and security. , and constantly evolved new network forms such as the next generation Internet, 5G mobile communication network, mobile Internet, and Internet of Things, as well as many new service models such as cloud computing, big data, and social networking.

Network security has become one of the research hotspots in today's world, which has aroused widespread concern in society. Network security is a systematic project, which has become the primary task of information construction and application. Network security technology involves laws and regulations, policies, strategies, norms, standards, mechanisms, measures, management and technology, which is an important guarantee for network security.

Information, materials and energy have become the three pillars and important guarantee for the survival and development of human society. The rapid development of information technology has brought profound changes to human society. With the rapid development of computer network technology, China has made remarkable achievements in network construction. With the wide application of e-banking, e-commerce and e-government, computer network has penetrated into all fields of national politics, economy, culture and national defense construction, and spread all over the work and life of modern information society. The integration of "digital economy" and global electronic transactions is taking shape. Network security is not only related to the national economy and people's livelihood, but also closely related to national security, not only involving all aspects of national politics, military affairs and economy, but also affecting national security and sovereignty. With the wide application of information technology and network technology, the importance of network security is particularly prominent. Therefore, the most critical and easily overlooked security problem in network technology is endangering the healthy development and application of the network, and network security technology and application have attracted more and more attention from the world.

Network security is a comprehensive interdisciplinary subject involving computer science, network technology, information security technology, communication technology, computational mathematics, cryptography and information theory. It is an important part of computer and information science, and it is also a new discipline developed in recent 20 years. It needs to integrate knowledge and research results in the fields of information security, network technology and management, distributed computing and artificial intelligence, and its concepts, theories and technologies are constantly developing and improving.

With the rapid development and wide application of information technology, the connotation of network security is constantly expanding, from the initial information secrecy to the integrity, availability, controllability and auditability of information, and then to the basic theory and implementation technology of "attack, prevention, detection, control, management and evaluation".