Cybersecurity is the technique of protecting networks, devices, and data from unauthorized access or criminal use, and the practice of ensuring the confidentiality, integrity, and availability of information.
Network security is, by its very nature, the security of information on a network. In a broad sense, all relevant technologies and theories related to the confidentiality, integrity, availability, authenticity and controllability of information on the network are the research field of network security. Network security is a crucial issue in the development of computer network technology and a weak link in the Internet.
Everything seems to depend on computers and the Internet nowadays: communications (e.g., email, smartphones, tablets), entertainment (e.g., interactive video games, social media, apps), transportation (e.g., navigation systems), shopping (e.g., online purchases, credit cards), medicines (e.g., medical devices, medical records), and so on. So, cybersecurity is very important.
Security risks in the network
1, the security policy is not set up tightly, the network access control rights and the segregation of the internal and external networks did not take strict security measures, resulting in a large number of security blind spots and misplaced areas in the network system.
2, someone may take advantage of the security holes that exist in the network to attack or steal data, threatening the security of the network and data. Although the firewall is an effective security tool that can hide the internal network structure and restrict access from external networks to internal networks, the firewall is often powerless and difficult to detect and prevent access between internal networks or the use of system vulnerabilities for invasion and attack.
3. Frequent reception of external data. Enterprise taxpayers use their own U disk when reporting relevant data, if the U disk is not thoroughly check the virus, the host to receive data may be infected with viruses, and then spread in the network.