Abstract
In today’s world, information technology is developing rapidly, and modern people are constantly exposed to the Internet. The advancement of computer technology promotes social progress, and the development of computer networks enables information sharing to be widely used in fields such as finance and trade. Computer networks have characteristics such as open architecture. However, due to the illegal theft, destruction, and leakage of information stored and shared on the network, significant losses occur, leading to serious security issues. With the development of Internet technology, the excessive openness of networks allows people to access massive amounts of information while also exposing them to risks such as information tampering and destruction. This article introduces the research on computer network security data encryption technology, analyzes the algorithms of data encryption technology in computer network security, and explores the application of data encryption technology in ensuring that network information is not arbitrarily stolen or destroyed.
Keywords: Data Encryption Technology; Computer Network Security; Application Value
1. Research on Data Encryption Technology in Computer Network Security
With the development of computer technology both domestically and internationally, telecommunication networks are rapidly evolving into information networks. In an information society, the role of computer networks in politics, military, finance, and commerce is increasingly significant. People establish various comprehensive information systems, typically relying on computer networks to process information. The network has gradually become the theme of social development, and as network sharing expands, network security is receiving attention. Issues of computer network security have raised significant concerns in society, making research into network security technology an important field within information science. The application of data encryption technology in computer network security plays a crucial role.
(1) Computer Network Security
Computer network security involves protecting the software, hardware, and data of computer network systems to ensure the system operates safely and normally. Computer network security encompasses information security technology guarantees and security personnel management norms. It covers a wide range of fields, broadly involving the technical theories related to the confidentiality and integrity of network information, which is the research area of network security. The security of network information content is a narrow aspect of information security, aimed at preventing attackers from exploiting system vulnerabilities for illegal actions such as eavesdropping. With the advancement of computer technology, network systems play an important role in social life, and the application scope of computer network systems in management and control across various socio-economic activities continues to expand. The trend of social informatization has led to increased dependence on information systems, and damage to network systems can have a significant impact on users.
(2) Introduction to Data Encryption Technology
Data encryption technology is the process of converting plaintext information into ciphertext that is difficult to read, serving as the core technology for ensuring the security of data in computer networks. Traditional data encryption algorithms include improved permutation algorithms, among others. The permutation algorithm is the simplest encryption algorithm, while the cyclic shift algorithm changes the positions of the data. CRC is effective for checking errors caused by interference in transmission channels. Data encryption technology can be divided into symmetric and asymmetric techniques. Symmetric encryption involves the sender and receiver using the same key to encrypt and decrypt data, ensuring data transmission security and confidentiality only if the key is not disclosed by either party. Symmetric encryption algorithms include AES, DES, and IDEA, among others. The DES data encryption algorithm is a symmetric 64-bit block cipher that has been successfully applied in the field of electronic fund transfers in banks. DES was proposed by IBM and is widely adopted as the standard for symmetric data encryption. Asymmetric encryption involves the sender and receiver using different keys for encryption and decryption, allowing secure communication without prior key exchange.
(3) Application Value of Data Encryption Technology in Computer Network Security
With the advancement of technology, issues of information security are becoming increasingly important. Certain measures must be taken to protect data security, and file encryption to prevent data leakage is the best solution to data security issues. Data must be encrypted during transmission over the network, and identity authentication technology is implemented using software to convert data into ciphertext before transmission, ensuring that interceptors cannot obtain correct information during data transport. Introducing encryption methods can achieve secure transmission of data in networked systems.
As the network rapidly develops, utilizing the network can make work more efficient and convenient, but information security issues on the Internet pose significant challenges. Data encryption is crucial. Implementing data encryption to conceal important information can ensure user information security. Using data encryption calculations can improve network communication security protection systems, and computer systems employing data encryption can create layered encryption protection systems to safeguard core data security. Many software applications require encryption, which is a key concern for users. Currently, applications like WeChat enrich people’s entertainment options, and encryption is necessary to ensure secure operation within software applications.
2. Algorithms of Data Encryption Technology in Computer Network Security
The rapid development of the computer industry has led to a continuous increase in the number of computer users worldwide, and the advancement of computer technology has promoted social progress and prosperity. The application of computer networks enables information to be widely used in various fields such as business and education. However, the open architecture of computer networks poses serious security issues due to unauthorized tampering of information stored and transmitted over the network. While the network facilitates information exchange, it also prompts discussions on network security issues. Security technologies such as identity authentication and data encryption have seen significant development. Cryptographic technology is the core technology of information security, and its commercial value is increasingly recognized.
(1) Computer Network Cryptographic Systems
Cryptography studies the principles of secret writing through mathematical systems to solve secret and authentication issues. Secret systems prevent information from being accessed by unauthorized entities, while authentication systems prevent unauthorized intrusion into information over public channels. Cryptography is the science that studies the principles of secret writing, including the composition and analysis of codes. Cryptographic systems consist of plaintext letter spaces, and algorithms define the transformation methods between plaintext and ciphertext. Cryptography has gradually developed through the practical struggle between encoding and decoding, becoming a comprehensive cutting-edge technology. Governments worldwide attach great importance to cryptographic work, and many computer scientists are engaged in cryptographic research. Data encryption transforms information to protect sensitive data, and the security of cryptographic systems relies on the confidentiality of keys. In mixed encryption schemes, data encryption is achieved through a combination of symmetric and asymmetric encryption.
(2) Data Encryption Algorithms in Computer Networks
Encryption algorithms process transmitted data for delivery to the receiver, preventing interceptors from reading the information without the corresponding decryption algorithms. Encryption algorithms include both non-key-based and key-based algorithms, with commonly used encryption algorithms such as DES. The DES algorithm is a classic symmetric encryption algorithm that segments plaintext into blocks before encryption, generating ciphertext after binary data operations. The parameters involved in the DES algorithm include the original data information and the applicable encryption mode key. When switching to encryption mode, the designated key is used to encrypt the plaintext, while the decryption mode uses the designated key to restore the information output.
DES has the advantage of fast computation speed, but its disadvantage is that the decryption key can be derived from the encryption key. The DES operation method includes permutation and shifting, with specific steps involving completing the initial value substitution of the plaintext and using the cryptographic function to complete the encryption. Current message digest algorithms include the MD1-MD6 series, with MD5 primarily ensuring the correct transmission of information and generating documents for others to download. Downloaders can use MD5 for verification. Many MD5 programs are available online to check data integrity. MD5 is widely used for encrypting user login passwords, with no restrictions on the length of input information, and basic methods include calculating remainders and looping variable operations. RSA is currently the most widely used public key encryption algorithm, recognized as a standard public key encryption algorithm, which faced attacks from hackers but has not been successfully cracked.
3. Application of Data Encryption Technology in Computer Network Security
Information networks represent the trend of economic and social development in today’s world, and the widespread application of computer networks has garnered significant attention. Due to the openness of computer networks, some rapidly developing countries face substantial threats. Our country’s network construction and technological equipment rely on foreign nations, making network security an important issue related to national sovereignty. Improving the technical level of computer network security and enhancing the security situation of computer networks has become an urgent task.
(1) Application Areas of Data Encryption Technology in Computer Network Security
The role of data encryption technology in computer network security is reflected in ensuring data security and maintaining network systems. Information data security is a crucial aspect of computer network security, and personal privacy is increasingly valued in the information age. Data encryption technology can guarantee personal information security, including maintaining data encryption. Data encryption technology possesses strong backup capabilities, strictly controlling encrypted data resources to prevent external attacks while performing self-system protection. Currently, vulnerabilities exist in computer data processing systems, and utilizing data encryption technology to encrypt network systems can achieve secure management of systems. Network users can encrypt network systems through permission settings, such as using a boot password to protect personal data security. By reasonably applying data encryption technology, external information can be checked to ensure information protection. In the e-commerce era, people are keen on online shopping, and payment involves financial transactions. Criminals exploit network technology for theft, and data encryption technology can strictly protect user account and asset information, preventing illegal activities.
(2) Application of Data Encryption Technology in Computer Network Security
The application of data encryption technology in computer network security includes data signing and information authentication technology. Endpoint data encryption technology is based on professional ciphertext to protect network data information. The application of endpoint data encryption technology in computer networks saves the information transmission steps of encryption and decryption, fully ensuring the security of computer network information. For data transmission, an independent transmission route must be established, and any anomalies in one route’s data packets do not affect others. Link data encryption technology is a widely used data encryption technology that conducts targeted encryption processing on data information across different transmission areas. The encryption methods for data transmission in various segments of computer systems differ, preventing criminals from reading ciphertext. The application of link encryption technology can promptly fill in data information. In recent years, data signing and information authentication technology have seen widespread application, primarily through verifying and confirming user identity information to ensure the security of computer network systems.
(3) Application of National Cryptography Algorithms in Industrial Internet Security
Cybersecurity plays an important role in maintaining our national sovereignty, and cryptographic technology is a fundamental national strategic resource. Industrial Internet security is a crucial aspect of network security. Currently, some mainstream cryptographic algorithms have security issues, prompting our country to increase research on domestic cryptographic algorithms. With the integration of industrialization and informatization, industrial Internet security has become a significant concern in network security, and enhancing research on national cryptographic algorithms is vital for improving our cybersecurity capabilities.
National cryptographic algorithms have formed a complete foundational cryptographic system in the commercial sector, such as SM1, SM4, and other cryptographic algorithms that have received national approval as industry standards. Algorithms like SM3 have passed reviews by the ISO/IEC Information Security Technical Committee, and the security of SM2 is higher than that of the internationally used ECDSA algorithm. In 2020, our country issued the “Cryptography Law,” which stipulates that commercial cryptographic products related to national interests must be inspected before being sold. Currently, the main cryptographic algorithm devices and products primarily use internationally accepted cryptographic algorithms. The application of national cryptographic algorithms in industrial Internet security involves access control, data security, and related key technologies, typically using symmetric algorithms like SM4 for encryption and decryption, and asymmetric algorithms like SM2 for generating message signatures, as well as using the SM3 hashing algorithm to compute message digests. Enterprises have developed national cryptographic encryption chips, cloud server cryptographic devices, and other data encryption products.