If asked why I always take leave at the beginning of the month, it's because there are leave slips at the beginning, but when I want to take leave at the end of the month, and there are no leave slips, I can only write forcefully, which results in not finishing writing, thus causing the update to be late, and eventually leading to the current situation.

Of course, sometimes at the end of the month, if I make up my mind, I can also get a new leave slip, but it is indeed very expensive, as, for example, I only took one day off at the end of last month.

In summary, I will probably update at around one in the morning, then you just need to refresh this chapter.

Abstract: With the gradual advancement and development of modern computer network technology, network security issues have received high attention from all walks of life and have become a primary concern of society. Improving our network security awareness is the guarantee that society progresses steadily. The application of data encryption technology is also an effective way to ensure computer network security. Therefore, this paper conducts a detailed analysis of the application of data encryption technology in computer network security issues for reference by interested readers.

Keywords: Data Encryption Technology; Computer Network Security; Main Functions; Application

At present, computer networks play a crucial role in our daily production and life and have become an essential tool for storing and transmitting digital information. However, given the open nature of computer networks, digital information is prone to malicious attacks during transmission, which may result in various information tampering or damage situations, causing significant losses for us. Data encryption technology is a kind of computer network security technology, applying it to computer networks can ensure the security of digital information, thereby ensuring the comprehensive interests of computer network users.

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, and it is also a crucial computer security protection technology. Data protection is the core goal of key setting; there are many types of ciphertext, among which port encryption, node encryption, and link encryption are important forms of current data encryption. Especially in e-commerce systems and bank systems, the application of data encryption is relatively broad. For instance, in bank systems, bank data encryption technology appears on the link between network devices, further demonstrating its interaction with network switching equipment. In the application of firewalls and switches, transmitting data information to system security devices for encryption processing and testing. The application of data encryption technology is to ensure the protection of data during network transmission, making it challenging for unlawful entities to steal information. Core data should undergo multiple encryption treatments, thus enhancing protection effects. Encryption technology will discontinue or shut down the data port exchange between firewall and switch when information is input incorrectly, providing a certain protective role [1]. Currently, the application of data encryption technology plays a crucial role in computer network security, with significant practical application 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 is the highest stage of the current development of data encryption technology. It essentially involves setting user login permissions through user data verification methods, thereby showing defense against external threats and ensuring the safe operation of the network. At present, the application of digital signature technology is relatively extensive; digital signatures mainly use key calculation methods and digital encryption principles to ensure the safe operation of the network [2]. Only when user data input is correct can login occur, which is also the main requirement of digital signature authentication. The cyclic shift algorithm is a common algorithm in data encryption algorithms, which achieves the swapping of data positions. In other words, during data transmission, data is presented in byte units, showing cyclic shifts between data bytes with strong regularity, but for those decrypting keys, it adds significant difficulty, requiring necessary processing and password document construction, making this method applicable and straightforward.

2 Main Functions of Data Encryption Technology in Computer Network Security

2.1 Helps Reduce Resource Consumption and Optimize Energy Efficiency

The application of data encryption technology in computer network security helps reduce resource consumption and shows energy optimization effects. Relevant workers can fully exhibit modern energy-saving effects when using data encryption technology, reducing resource consumption during network operation. Subsequently, strengthen the control of computer network systems, reflecting the important development goal of energy 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 and reduce costs to a minimum. First, from a substantive perspective, data encryption technology is currently the most advanced scientific technology, and its application in computer network systems can efficiently enhance digital information processing efficiency while also improving network technology resources, reducing overall network operation costs. Second, while improving the information processing efficiency of computer networks, data encryption technology can also ensure the stable operation of network systems, helping optimize defects in previous technologies, gradually improving network technology. Finally, compared to previous computer network technology in our country, the current data encryption technology is more precise in digital information processing [3]. Hence, this technology can effectively save data processing time to the maximum extent, saving physical, financial, and human resources, finally leading to a comprehensive reduction in network operating costs.

2.3 Helps Enhance Collaboration Capability

The application of data encryption technology in computer network security enables its organic fusion with computer network security technology, thereby enhancing computer network collaboration capability. First, relevant workers can scientifically build on the existing network architecture through the application of data encryption technology, strengthening and improving the network structure, and enhancing the security of the network environment. Then, by adopting data encryption technology, relevant workers can also comprehensively improve the network hierarchy, enhancing collaboration capability. Finally, data encryption technology can effectively assist relevant workers in supervising and managing all network systems, implementing efficient monitoring of collaboration, subsequently ensuring comprehensive and orderly management of the computer network to ensure normal operation of computer systems.

2.4 Helps Leverage Data Encryption Technology's Inference Ability

The application of data encryption technology in computer network security helps fully exercise the inference ability of data encryption technology. With the widespread application of computer network technology in various domains, relevant workers should comprehensively strengthen the management intensity of inference ability, thus ensuring the coordination ability of network systems. The application of data encryption technology can efficiently guarantee the coordination ability of network systems, prompting the full exertion of network management efficacy [4]. Moreover, relevant workers can also implement efficient supervision on comprehensive network work by using data encryption technology, subsequently implementing reasonable and precise judgments and inferences on the correctness of the network, ensuring safe operation of the network system.

3 Main Factors Restricting Data Security in Computer Networks

3.1 Absence of Institutional Preventive System

In the process of establishing the Computer Network Security framework in our country, there are certain deficiencies, and some current domestic laws and regulations have difficulty in keeping up with the rapid development of present network technology. This issue mainly manifests in the lack of awareness of network data security prevention among many domestic companies, insufficient data security systems, and the absence of scientific regulations and methods to support network data security management. This easily creates opportunities for criminals, leading to significant losses for companies [5]. Based on this, companies need to deeply contemplate the management system level of network data security, improve and perfect deficiencies in this area, prevent issues 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 matters. People do not engage in in-depth study or attention to Computer Network Security, lack awareness of network security, and do not emphasize the most basic protection and defense, failing to scientifically respond to network incidents and unsafe factors under cumbersome circumstances [6]. Additionally, some network software often used by people, provided by operators or providers, only emphasize network marketing effects and do not focus on the support and management of network security. Such security measures are mere formalities, hardly meeting customers' security demands in real environments, easily leaving security risks.

3.3 Lack of core software technology

In terms of independent technical research and development, the domestic front started relatively late, especially under the perspective of network operating environments. The current security vulnerabilities primarily appear in: operating system security, CPU chip technology, SQL database protection, gateway and software security, etc. Generally, the above technologies mainly rely on the strong support of mature imported products or technologies, which significantly reduces the domestic network data security index and presents certain network security risks, easily causing losses. It is necessary to recognize this issue, grasp the passive nature and disadvantages in this area domestically, and simultaneously innovate on existing technologies.

3.4 Evaluation system needs supplementation

Computer data network security, under normal circumstances, requires regulation of basic hacker prevention systems as the most efficient security evaluation method. By using this method to evaluate the original security coefficient, it assists companies in improving the original platform with a set of reasonable and detailed analyses and instructions to maintain network data security. If the evaluation system's construction is strengthened and more advanced technology is expanded, benefits can be gained on both economic and technical levels.

4 Security Issues

4.1 System configuration issues

In computer networks, network security issues not only include hacker and virus threats but also unscientific system configuration issues. Unscientific system configurations can also create certain network security issues, mainly because while using computer networks, there is insufficient familiarity with system configurations. Some users even believe that the firewall has no practical effect within the system, thereby choosing to uninstall it. This significantly reduces the security of computer networks, and users' important information and data cannot be effectively protected. Additionally, although some people install firewalls, due to configuration and version conditions, they cannot well meet the requirements of computer network system configurations, resulting in various levels of security issues.

4.2 Virus issues

This issue is a core factor causing security problems in computer networks. Viruses not only have fast transmission efficiency, but also various transmission modes with diversity. In essence, viruses exploit computer networks to propagate, posing a certain threat to customers' information and data security. For example, in previous years, the popular "Panda Burning Incense" virus could easily cause computer networks to experience massive paralysis if cybersecurity protection is weak [7]. As a result, information and data could easily leak, and users' interests would suffer various losses.

4.3 Hacker issues

Some criminal individuals will use hackers to conduct malicious attacks on computer networks, causing computer systems to fail to operate normally, or lead to many system disorders. Furthermore, hacker attacks can alter or snoop on important information and privacy. This severely restricts people's use of computer networks and can affect users' interests to a certain extent [8]. Moreover, hacker attacks can intercept the transmission process of information and data, acquiring the most critical information and data, leading to the leakage of customer information and data, seriously harming customers' interests.

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

5.1 Network anti-virus technical ability needs enhancement

To achieve real-time filtering capability, it is necessary to install a virus firewall system. Conduct frequent scans and continuous monitoring of files in the network server, or add antivirus cards on workstations. Data should be encrypted, set file access permissions and network access permissions, controlling certain files that only servers have permission to execute. Those without permission cannot access due to data encryption.

5.2 Application of Data Encryption Technology

First, the application of data encryption technology can promptly start disaster recovery methods and emergency response procedures during intrusions and attacks. The core of this technology is to equip necessary encryption products, such as intrusion detection systems, network scanners, firewalls, etc., to perform real-time network analysis and monitoring, quickly identify attack targets and take appropriate measures. Additionally, through emergency plans and backup systems, the system can recover in emergency situations. Second, data encryption technology can provide vital assurance in open network services. Internet security measures not only ensure protection from external attacks but also allow the use of rapid and broad network data resources. The core approach is to focus on access technology, establishing an impregnable barrier through firewalls, and proactively inspecting FTP and Web services [9]. Therefore, it is essential to strengthen the sense of responsibility of internal network users, apply data encryption, and, under special circumstances, incorporate necessary audit means.

5.3 Application of Password Technology

Currently, password technology is the competitive edge of core technology for network data security, providing essential guarantees for network data security. Presently, password technology is primarily applied in key management methods, classical password methods, single-key cryptography systems, digital signature methods, etc. Among these methods, digital signature methods and identity authentication are the most crucial methods for ensuring the comprehensiveness of data information today.

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