What does computer network security mean?

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Computer network security includes not only networking hardware and software used to manage and control the network, but also resources enjoyed by * * * and fast network services, so the definition of network security should cover all the contents involved in computer networks. Referring to the definition of computer security given by ISO, it is considered that computer network security refers to "protecting the hardware, software and data resources in the computer network system from being destroyed, changed or leaked by accidents or malicious reasons, so that the network system can run continuously and reliably, and the network service can be carried out normally and orderly."

Computer network security refers to the use of network management control and technical measures to ensure the confidentiality, integrity and availability of data are protected in the network environment. Computer network security includes two aspects, namely physical security and logical security. Physical security refers to the physical protection of system equipment and related facilities to prevent damage and loss. Logical security includes the integrity, confidentiality and availability of information.

potential threat

There are many factors that lead to computer information insecurity, including human factors, natural factors and accidental factors. Among them, human factors refer to some lawless elements who take advantage of loopholes in computer networks, or sneak into computer rooms, steal computer system resources, illegally obtain important data, tamper with system data, destroy hardware equipment, and write computer viruses. Human factors are the biggest threat to computer information network security. The unsafe factors of computer network are mainly manifested in the following aspects:

Confidentiality: The feature that information will not be disclosed to or used by unauthorized users, entities or processes.

Integrity: the characteristics of data cannot be changed without authorization. In other words, information remains unchanged, not destroyed or lost during storage or transmission.

Availability: Functions that authorized entities can access and use as needed. That is, whether the required information can be accessed when needed. For example, denial of service in the network environment, destroying the normal operation of the network and related systems are all attacks on usability.

Controllability: the ability to control the dissemination and content of information.

Auditability: provide basis and means when security problems arise.