As the title suggests, because my typing speed is a bit slow today, so the update will be a little late, probably around one or two in the morning. By then, you just need to refresh this chapter.

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Abstract: With the gradual advancement and development of computer network technology, network security issues have received high attention from all sectors, and have now become a key focus of society. The improvement of our network security awareness is a guarantee for the gradual development and progress of society. The use of data encryption technology is also an effective way to ensure computer network security. Therefore, this paper provides a detailed analysis of the application of data encryption technology in computer network security for reference by relevant readers.

Keywords: Data encryption technology; Computer network security; Main role; Application

At present, computer networks play a crucial role in our daily production and life, and they have become an essential tool for modern people to store and transmit digital information. However, due to the open characteristics of computer networks, digital information is extremely vulnerable to malicious attacks during transmission, which can result in information tampering or damage, causing significant losses. Data encryption technology is a type of computer network security technology. Its application in computer networks can ensure the safety of digital information, thereby guaranteeing the comprehensive interests of computer network customers.

1 Overview of Computer Encryption Technology

1.1 Overview of Data Encryption

Data encryption is the process of converting plaintext information into digital information with a key based on established cryptographic algorithms, and it is also an important technology for computer security protection. The core purpose of key settings is data protection, and there are many types of ciphertext, among which port encryption, node encryption, and link encryption are important forms of data encryption today. Particularly in e-commerce systems and bank systems, the application of data encryption is relatively widespread. For example, in bank systems, bank data encryption technology manifests itself in the links between network devices, hence it showcases its interaction with network exchange equipment. In the use of firewalls and switches, data information is transmitted to system security devices for encryption processing and inspection. The use of data encryption technology during network transmission plays an important protective role for data; it encrypts data so that it is difficult for illegal entities to steal information. Core information should be encrypted multiple times to enhance protection. In case of wrong information input, encryption technology will disconnect or close data ports of firewalls and switches, serving a protective function[1]. Currently, the use of data encryption technology plays an important role in computer network security and has crucial practical application effects and value, as shown in Figure 1.

1.2 Application and Algorithm of Data Encryption

The application of digital signature authentication technology in computer network technology and network authentication technology is the highest stage of current data encryption technology development. It is essentially a setting of user login permissions through user data verification methods, thus defending against external intrusions and ensuring the safe operation of the network. Currently, the application of digital signature technology is relatively extensive. The digital signature mainly ensures the safe operation of the network using key calculation methods and digital encryption principles[2]. Only after the correct user data input can login occur, which is also the main requirement of digital signature authentication. The circular shift algorithm is a commonly seen algorithm in data encryption algorithms, achieving data position swapping. In other words, during data transmission, data is by bytes, exhibiting circular shifts between data bytes, which has strong regularity but poses great difficulty to key decipherers. Necessary processing and the construction of cipher text are applied to the data, and this method is both applicable and simple.

2 The Main Role of Data Encryption Technology in Computer Network Security

2.1 Helps Reduce Resource Consumption and Optimize Energy Saving

The application of data encryption technology in computer network security helps reduce resource consumption, showing energy-saving optimization effects. When relevant workers apply data encryption technology, they can fully utilize modern energy-saving effects, reducing resource losses during network operation. Consequently, strengthening control over computer network systems reflects the important development goal of energy-saving optimization.

2.2 Helps Enhance Information Processing Capability and Reduce Costs

The application of data encryption technology in computer network security helps enhance the information processing capability of computer network systems, minimizing costs. Firstly, data encryption technology, from an essential viewpoint, is the most avant-garde scientific technology today. When applied to computer network systems, it can efficiently increase the processing efficiency of digital information while improving network technology resources, reducing the overall cost of network operation. Secondly, data encryption technology improves the efficiency of computer network information processing while ensuring the stable operation of network systems, helping to optimize defects in past technologies and gradually perfecting network technology. Finally, compared to past computer network technology in our country, data encryption technology is more precise in the digital information processing aspect[3]. Therefore, this technology can effectively save data processing time to the greatest extent, conserving physical, financial, and human resources, ultimately leading to a comprehensive reduction in network operation costs.

2.3 Helps Enhance Collaboration Ability

The application of data encryption technology in computer network security can be organically integrated with computer network security technology, thereby enhancing the collaboration ability of computer networks. Firstly, relevant workers, when applying data encryption technology, can scientifically construct existing network architectures, thereby fortifying and strengthening network architectures and enhancing the safety of the network environment. Then, by adopting data encryption technology, relevant workers can comprehensively improve network layers and improve collaboration abilities. Finally, data encryption technology can effectively assist relevant workers in supervising and managing all network systems, efficiently monitoring their collaboration, and subsequently managing the comprehensive and orderly way of computer networks, ensuring the normal operation of computer systems.

2.4 Helps Utilization of Data Encryption Technology's Inference Ability

The application of data encryption technology in computer network security helps fully utilize data encryption technology's inference ability. As computer network technology is widely used in many domains, relevant workers should comprehensively strengthen management efforts on inference ability to ensure the coordination ability of network systems. The application of data encryption technology can efficiently ensure the coordination ability of network systems, promoting the full utilization of network management effects[4]. Additionally, the use of data encryption technology by relevant workers can also efficiently supervise integrated network work, subsequently implementing reasonable and precise judgment and inference on the correctness of the network, ensuring the safe operation of the network system.

3 Main Factors Restricting Computer Network Data Security

3.1 Lack of Institutional Preventive System

In the process of establishing computer network security prevention systems in China, there are certain deficiencies, and some current domestic laws and regulations are difficult to meet the rapid development of today's network technology. This mainly manifests in the lack of network data security prevention awareness among most domestic companies, deficient data security systems, and a lack of scientific regulations and measures to support network data security management. This easily leaves opportunities for criminals, subsequently causing significant losses to companies[5]. Based on this, companies need to carefully consider the management system level of network data security, improve and perfect the deficiencies in this aspect, prevent problems before they occur, and effectively avoid unstable factors in network security.

3.2 Operators lack basic security awareness

In daily life, people often use the network for learning, work, entertainment, and other aspects. People do not deepen their study or attention to the computer network security level, lacking cognition of network security, and do not focus on the most basic protection and defense, unable to scientifically respond to network incidents and unsafe factors under complex circumstances[6]. Moreover, some network software commonly used is operated by merchants or providers who only emphasize the effect of network marketing and do not pay attention to the support and management of network security, making such security measures ineffective and unable to meet customers' security needs in actual environments, easily leaving security risks.

3.3 Lack of core software technology

Domestic independent technology research started relatively late, especially in the realm of network operating environments. Current security vulnerabilities mainly manifest in the security of operating systems, CPU chip technology, SQL database protection, gateways, and software security. These technologies generally rely heavily on mature imported products or great strength from foreign technologies. This model significantly lowers the domestic network data security index, posing certain network security risks and easily causing losses. We must truly recognize this issue, grasp the passive and disadvantaged position of domestic technology in this realm, while needing to innovate current technologies.

3.4 Evaluation systems need supplementation

Computer data network security usually requires regulating basic hacker prevention systems as the most efficient security evaluation method. By adopting this method to evaluate the original safety coefficient, or assisting companies in perfecting their existing platforms, using a set of reasonable and detailed analysis and explanations to maintain network data security. If the evaluation system is strengthened and more advanced technology expanded, there can be economic and technical benefits.

4 Security issues

4.1 System configuration issues

In the computer network, computer network security issues not only include hackers and viruses but also involve unscientific system configuration problems. Unscientific system configuration can also form certain computer network security issues. Mainly because during the use of computer networks, users are not familiar enough with system configuration, and some users even think that the firewall in the system does not have actual efficacy and uninstall it. This significantly reduces computer network security, making it difficult to ensure effective protection of users' important information and data security. In addition, although some people install firewalls, due to configuration and version status, they cannot well meet the computer network system configuration requirements, thus causing different degrees of security problems.

4.2 Virus issues

This issue is a core factor causing security problems in computer networks. Viruses not only have a fast transmission efficiency, but the transmission modes of various viruses also have diversity. Essentially, viruses use computer networks to spread, forming certain threats to the security of clients' information and data. For instance, the once-popular "Panda Burning Incense", if computer network security protection is not strong, could easily cause a broad area network paralysis[7]. Thus, information and data can easily leak, while user interests suffer various losses.

4.3 Hacker issues

Some unlawful individuals may use hackers to maliciously attack computer networks, resulting in computer systems being unable to operate properly, or appearing in numerous chaotic system situations. Moreover, hacker attacks can alter or pry into important information and privacy information. This not only severely restricts people's use of computer networks but also affects users' own interests to some extent[8]. In addition, hacker attacks can intercept information and data during transmission processes, obtaining the most crucial information and data, leading to leaks of customer information and data, seriously damaging customers' interests.

5 The application of data encryption technology in the network information security domain

5.1 Network anti-virus technological capability needs strengthening

To exhibit filtering functionality at any time, it is essential to install a virus firewall system. Conduct frequent scanning and gradual monitoring of files on network servers, or add antivirus cards to workstations. Moreover, it's necessary to encrypt data processing, establish file access permissions and network access permissions, controlling files executable only by authorized servers, and those without authority cannot obtain data as it has been encrypted.

5.2 Application of data encryption technology

Firstly, the application of data encryption technology can initiate disaster recovery methods and emergency handling processes anytime during invasions and attacks. The core of this technology is equipped with necessary encryption products, such as intrusion detection systems, network scanners, and firewalls, implementing immediate network analysis and monitoring. It can identify attacking objects at any moment and undertake corresponding countermeasures, while also utilizing emergency plans and backup systems to restore systems in urgent situations. Secondly, data encryption technology can provide essential guarantees in open network services. Internet security measures can not only ensure immunity from external attacks but also employ speedy and broad network data resources. The key approach is to emphasize access technology, establish an impregnable barrier through firewalls, and adopt an enthusiastic review attitude towards FTP services and Web services[9]. Therefore, strengthening the sense of responsibility among internal network clients is essential, encrypting data processing is necessary, and under special circumstances, additional auditing measures should be taken.

5.3 Application of password technology

Currently, password technology is the competitive core technology of social network data security, offering critical guarantees for network data security. Today, password technology is mainly applied in key management methods, classical password methods, single-key password systems, digital signature methods, and other aspects. However, among these methods, digital signature methods and identity authentication are the current core methods to ensure the comprehensiveness of data information.

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