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This article mainly introduces what is involved in computer network security, which has a certain reference value. Interested friends can refer to it. I hope you will gain a lot after reading this article. Let's take a look at it with you.

The content of computer network security can be summarized into three aspects: advanced technology, strict management and dignified law. Computer network security refers to the use of network management control and technical measures to ensure that the confidentiality, integrity and usability of data are protected in a network environment.

The content of computer network security can be summarized into three aspects: advanced technology, strict management and dignified law.

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

Technical level

As for the technology, the computer network security technology mainly includes real-time scanning technology, real-time monitoring technology, firewall, integrity inspection and protection technology, virus analysis and report technology and system security management technology. Taken together, the following countermeasures can be taken at the technical level:

1) establish a safety management system. Improve the technical quality and professional ethics of personnel, including system administrators and users. It is a simple and effective method to strictly boot up and check virus and back up data in time for important departments and information.

2) Network access control. Access control is the main strategy of network security prevention and protection. Its main task is to ensure that network resources are not illegally used and accessed. It is one of the most important core strategies to ensure network security. Access control involves a wide range of technologies, including access control, network access control, directory-level control, attribute control and other means.

3) backup and recovery of database. Database backup and recovery is an important operation for database administrators to maintain data security and integrity. Backup is the easiest and most accident-proof way to restore a database. Recovery is the operation of using backup to recover data after an accident. There are three main backup strategies: only backing up the database, backing up the database and transaction logs, and incremental backup.

4) apply cryptographic technology. The application of cryptographic technology is the core technology of information security, and cryptographic means provide a reliable guarantee for information security. Password-based digital signature and identity authentication is one of the most important methods to ensure information integrity. Cryptographic technology mainly includes classical cryptosystem, single-key cryptosystem, public key cryptosystem, digital signature and key management.

5) cut off the route of transmission. Carry on the thorough antivirus treatment to the infected hard disk and computer, do not use U disk and program of unknown origin, do not download suspicious information of the network at will.

6) improve the ability of network anti-virus technology. Real-time filtering is carried out by installing a virus firewall. Scan and monitor the files in the network server frequently, use the anti-virus card on the workstation, and strengthen the setting of network directory and file access rights. In a network, restrict files that can only be executed by the server.

7) develop and improve a highly secure operating system. It is safer to develop a highly secure operating system that does not give a hotbed of virus breeding.

Management level

The security management of computer network depends not only on the security technology and preventive measures adopted, but also on the management measures taken and the implementation of computer security protection laws and regulations. Only by closely combining the two, can computer network security be really effective.

The security management of computer network includes the security education for computer users, the establishment of corresponding security management institutions, the continuous improvement and strengthening of computer management functions, and the strengthening of computer and network legislation and law enforcement. Strengthening computer security management, strengthening users' laws, regulations and moral concepts, and improving computer users' security awareness are very important measures to prevent computer crimes, hacker attacks and computer virus interference.

This requires constant legal education for computer users, including computer security law, computer crime law, secrecy law, data protection law, etc., to clarify the rights and obligations that computer users and system managers should perform, consciously abide by the principles of legal information system, legitimate users, information disclosure, information utilization and resource restriction, and consciously fight against all illegal and criminal acts. Maintain the security of computer and network system, maintain the security of information system. In addition, computer users and all staff should be educated to consciously abide by all the rules and regulations established to maintain the security of the system, including personnel management system, operation maintenance and management system, computer processing control and management system, various data management system, computer room security management system, special aircraft and strict division of labor and other management systems.

Physical security level

In order to ensure the security and reliability of the computer network system, it is necessary to ensure that the system entity has a secure physical environment. This safe environment refers to the computer room and its facilities, which mainly includes the following:

1) the environmental conditions of the computer system. The safety environmental conditions of the computer system, including temperature, humidity, air cleanliness, corrosion, insect pests, vibration and shock, electrical interference and so on, should have specific requirements and strict standards.

2) the selection of the site environment of the computer room. It is very important for the computer system to choose a suitable installation site. It directly affects the security and reliability of the system. When selecting the computer room site, we should pay attention to its external environmental safety, geological reliability, site anti-electromagnetic interference, avoid strong vibration sources and strong noise sources, and avoid being located in the upper floor of the building and the lower floor or next door of water equipment. Also pay attention to the management of entrances and exits.

3) the safety protection of the computer room. The security protection of the computer room is the security measures and countermeasures taken against the physical disasters of the environment and preventing unauthorized individuals or groups from destroying, tampering with or stealing network facilities and important data. In order to achieve regional security, first of all, physical access control should be considered to identify the identity of the visiting user and verify its legitimacy; second, the scope of activities of visitors must be limited; third, multi-layer security rings should be installed outside the central equipment of the computer system to prevent illegal and violent intrusion; the fourth equipment should be located in a building with facilities to resist various natural disasters.

Computer network security is a complex system engineering, which involves many factors such as technology, equipment, management and system. The formulation of security solutions needs to be grasped as a whole. The network security solution is to integrate all kinds of computer network information system security technologies, including security operating system technology, firewall technology, virus protection technology, intrusion detection technology, security scanning technology and so on. to form a complete and coordinated network security protection system. We must attach equal importance to management and technology, and security technology must be combined with security measures, strengthen computer legislation and law enforcement, establish backup and recovery mechanisms, and formulate corresponding security standards. In addition, as computer viruses, computer crimes and other technologies know no national boundaries, it is necessary to carry out full international cooperation to jointly deal with the increasingly rampant computer crimes and computer viruses.

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