Recently, due to the reason that I only have time to write at night, and coupled with some writer's block lately, it's often easy to find myself unable to finish writing, so today, the update will be delayed again, probably around one o'clock in the morning. By then, just refresh this chapter to see the update.

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Abstract: As today's computer network technology gradually progresses and develops, network security issues are also receiving high attention from various sectors, becoming a major concern for society. Our improvement in network security awareness is the guarantee for gradual societal development and progress. The application of data encryption technology is also an effective way to ensure computer network security. Therefore, this article provides a detailed analysis of the application of data encryption technology related issues in computer network security for relevant readers' reference.

Keywords: Data Encryption Technology; Computer Network Security; Primary Role; Application

At present, computer networks play a crucial role in our daily production and life and have become an indispensable important tool for storing and transmitting digital information. However, due to the open characteristics of computer networks, digital information can easily be maliciously attacked during transmission, leading to alteration or damage to various information and causing significant losses. Data encryption technology is a type of computer network security technology. Applying it to computer networks can ensure the security of digital information, thereby safeguarding the overall interests of computer network clients.

1. Overview of Computer Encryption Technology

1.1 Overview of Data Encryption

Data encryption converts plaintext information into digital information with a key according to established encryption algorithms; it is also an important technology for computer security protection. Data protection is the core purpose of key settings, and ciphertext types include many forms, among which port encryption, node encryption, and link encryption are currently important forms of data encryption. Particularly in e-commerce systems and banking systems, the application of data encryption is relatively broad. For example, in banking systems, bank data encryption technology manifests in linkages between network devices and network switching facilities. This also occurs in firewalls and switches, where data information is transmitted to system security devices for encryption processing and detection. The application of data encryption technology ensures data plays a significant protective role during network transmission; encryption technology processes data cryptographically, making it more difficult for illegal parties to retrieve information. Core information should undergo multiple encryption processing to enhance protection, and when information is input incorrectly, it causes disconnection or closure of data ports between firewalls and switches, thereby playing a protective role [1]. Currently, the application of data encryption technology plays a significant role in computer network security and has critical practical application effects and value, as shown in Figure 1.

1.2 Application and Algorithms of Data Encryption

Digital signature authentication technology is applied in computer network technology, and network authentication technology represents the highest stage of data encryption technology development. It essentially establishes user login permissions through user data verification methods, thereby presenting defenses against external threats and ensuring secure network operation. Currently, the application of digital signature technology is relatively broad, primarily utilizing key computation methods and digital encryption principles to guarantee secure network operation [2]. Users must correctly input their data to log in, which is also a primary requirement of digital signature authentication. The circular shift algorithm is a common algorithm in data encryption that realizes the swapping of data positions. In other words, during data transmission, the data displays circular shifting between data bytes in units of bytes with a strong pattern, but significantly increases difficulty for those deciphering the key. Processing and constructing ciphertext through necessary methods prove to be applicable and simple.

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

2.1 Contributes to Resource Consumption Reduction and Energy Optimization

The application of data encryption technology in computer network security contributes to reducing resource consumption and exhibits energy optimization effects. When relevant workers use data encryption technology, they can fully leverage modern energy efficiency, reducing resource loss during network operation and further enhancing control over computer network systems, embodying important development goals in energy optimization.

2.2 Helps Improve Information Processing Capability and Reduce Costs

The application of data encryption technology in computer network security is beneficial for enhancing the information processing capability of computer network systems, minimizing costs. Firstly, data encryption technology, viewed in essence, is the forefront scientific technology today; applying it in computer network systems can efficiently enhance the processing efficiency of digital information, while also perfecting network technology resources and reducing the overall cost of network operation. Secondly, data encryption technology, in improving computer network information processing efficiency, also ensures stable network system operation, aids in optimizing past technological defects, and gradually refines network technology. Lastly, compared to past computer network technology in China and modern data encryption technology, data encryption technology is more precise in digital information processing [3]. Therefore, this technology can effectively save data processing time to the maximum extent, saving physical, financial, and human resources, ultimately reducing comprehensive network operating costs.

2.3 Enhances Collaboration Capability

The application of data encryption technology in computer network security can organically fuse with computer network security technology, thereby enhancing collaborative capability in computer networks. Firstly, relevant workers, when using data encryption technology, can scientifically construct existing network architectures, advancing and strengthening network architectures and enhancing the security of the network environment. Then, workers can comprehensively refine network tiers and collaboration capabilities through data encryption technology. Lastly, data encryption technology can effectively assist relevant workers in supervising and managing all network systems, conducting efficient monitoring of their cooperation and orderly managing computer networks overall, ensuring normal operation of computer systems.

2.4 Helps Utilize Data Encryption Technology's Inference Ability

The application of data encryption technology in computer network security helps fully utilize its inference ability. As computer network technology is broadly applied in various domains, relevant workers should comprehensively strengthen management intensity of inference ability to ensure coordination capability of network systems. The application of data encryption technology ensures effective coordination capability for network systems, promoting comprehensive utilization of network management effects [4]. Furthermore, relevant workers can also utilize data encryption technology to efficiently regulate comprehensive network operations, thereby rationally and precisely judging and inferring the correctness of the network, ensuring safe operation of the network system.

3. Main Factors Restricting Computer Network Data Security

3.1 Lack of Institutional Prevention Systems

During the establishment of computer network security prevention systems in China, certain defects exist, and some current laws and regulations are difficult to comply with the rapid development of network technology. This aspect is primarily reflected in the fact that a majority of domestic companies do not possess network data security prevention awareness, lack data security systems, and are lacking scientific regulations and methods to support network data security management. Such circumstances easily provide criminals with opportunities, causing severe damage to companies [5]. Therefore, companies need to reflect deeply on the management system level of network data security, perfect and refine shortcomings in this aspect, and prevent issues in advance, effectively avoiding unstable factors within network security.

3.2 Operators Lack Basic Security Awareness

In daily life, people often use the internet for learning, work, entertainment, and other matters. People do not delve into learning and focusing on Computer Network Security; they lack awareness of network security and do not pay attention to the most basic protection and defense, unable to scientifically respond to network events and insecure factors in complex situations [6]. Furthermore, some network software commonly used by people is operated by merchants or providers who only focus on the effects of network marketing and do not pay attention to supporting and managing network security. Such security measures are merely formalities and cannot meet customers' security requirements in actual environments, leaving potential safety hazards.

3.3 Lack of Core Software Technology

The domestic research on independent technology started relatively late, especially from the perspective of network operational environments. Current security vulnerabilities mainly manifest in: operating system security, CPU chip technology, SQL database protection, gateway and software security, among others. These technologies mainly rely on mature imported products or the strong support of technology; this model drastically reduces the domestic network data security index, causing certain network security risks and likely resulting in losses. Realizing this problem is essential, understanding the domestic shortcomings and disadvantages in this domain, and simultaneously innovating existing technology is needed.

3.4 Evaluation System Needs Supplementation

Computer data network security usually requires the regulation of basic hacker prevention systems as the most effective security evaluation method. By employing such methods to evaluate the original security coefficient, or assisting companies in improving existing platforms through a comprehensive and reasonable analysis and explanation, network data security is maintained. If the construction of the evaluation system is strengthened and more avant-garde technology is developed, benefits can be found both economically and technically.

4 Security Issues

4.1 System Configuration Issues

In computer networks, Computer Network Security issues not only include hackers and viruses but also unscientific system configuration issues. Unscientific system configuration can also form certain Computer Network Security issues. Mainly because there is insufficient familiarity with system configuration when using computer networks, some users even believe that firewalls in systems have no practical effect and choose to uninstall them. This significantly reduces Computer Network Security, and the safety of users' important information and data cannot be effectively guaranteed. Moreover, some people, despite installing firewalls, cannot meet the Computer Network System Configuration requirements well due to configuration and version conditions, leading to varying degrees of security issues.

4.2 Virus Issues

This issue is a core factor causing security issues in computer networks. Viruses not only have fast transmission efficiency but also diverse transmission modes. Viruses essentially spread using computer networks, forming a certain threat to customers' information and data security. For instance, the once popular "Panda Burning Incense," if Computer Network Security Protection is not strong enough, can easily cause widespread paralysis of computer networks [7]. Consequently, information and data are prone to leakage, and user interests suffer various losses.

4.3 Hacker Issues

Some illegal individuals use hacking to maliciously attack computer networks, resulting in an inability to normally use computer systems or various system disorder conditions. Furthermore, hacker attacks will tamper with or spy on important and private information. This severely restricts people's use of computer networks and affects users' own interests [8]. Besides, hacker attacks can intercept the information and data transmission process, obtain the most crucial information and data, causing leakage of important information such as customer data, seriously damaging customer interests.

5 The Application of Data Encryption Technology in the Network Information Security Domain

5.1 Network Anti-virus Technology Capability Needs Reinforcement

To exhibit real-time filtering functions, it is necessary to install a virus firewall system. Frequently scanning files on network servers and progressively monitoring them, or adding antivirus cards on workstations and encrypting data, set file access permissions and network access permissions, controlling files executable only by authorized servers. Those without permission cannot gain access due to encrypted data processing.

5.2 The Application of Data Encryption Technology

Firstly, employing data encryption technology can initiate disaster recovery methods and emergency handling processes at times of invasion and attack. The core of this technology is equipping necessary encryption products such as intrusion detection systems, network scanners, firewalls, etc., conducting real-time network analysis and monitoring, identifying attack targets and taking corresponding measures, while utilizing emergency plans and backup systems for system recovery in urgent situations. Secondly, data encryption technology can provide essential guarantees in open network services. Internet protection strategies ensure safety from external attacks while enabling quick and broad use of network data resources. The core method emphasizes access technologies, establishing sturdy gateways through firewalls, and adopting a proactive review attitude towards FTP services and Web services [9]. Therefore, internal network customer responsibility must be strengthened, data must be encrypted, and necessary audit means should be added under special circumstances.

5.3 The Use of Encryption Technology

Currently, encryption technology is the core competitive edge of social network data security technology, providing crucial assurance for network data security. Presently, encryption technology is mainly applied in key management methods, classical encryption methods, single-key encryption systems, digital signature methods, among others. However, digital signature methods and identity authentication are now the most core methods to ensure the integrity of data information.

5.4 The Importance of Security Management Regulation

To ensure network data safety, it is imperative to enhance the professional quality and moral cultivation of relevant managers and users, strictly safeguard core data confidentiality, and thoroughly complete data inspection and backup.

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