Application Analysis of data encryption technology in computer security

With the rapid development of modern computers, computer network knowledge has been popularized among the masses, which has led to a further development of computer networks, but it is precisely because of the rapid development of computer networks, it also caused a series of problems, such as the arbitrary theft of network information on various websites and the spread of various software viruses on the network. However, due to a series of problems, people are paying attention to network security and taking a series of measures such as security protection and data encryption for computer data, in addition, the characteristics of data encryption in computer applications are analyzed in detail, so as to put forward the security problems that computer networks are facing, so as to better demonstrate the value of data encryption in computer security.

1. Historical Origins of encryption technology

The data encryption technology has been around for more than two thousand years. The ancient Egyptian people used hieroglyphics to express their wishes. But with the development of the times, both ancient Babylon and Greece began to protect their ancient civilization and culture in some ways. Due to technological advances, encryption technology has also been used in the military, for example, in the Second World War and the United States Civil War. As the computer continues to change and the computing power is also increasing, encryption technology is gradually becoming increasingly difficult to study.

2. Basic principles of encryption technology

Encryption technology is used to encrypt the original information. It turns the most important information and data into garbled characters and decrypts the data through different means, to ensure that people's information is not easily read by others, so that computers can run securely. There are two basic encryption methods: Replace the secret and convert the encryption.

2.1 change Encryption

Encryption is to replace the letters in the original text with letters in a different alphabet than normal letters and sequences.

2.2 conversion Encryption

Conversion encryption is to sort out the original alphabetic order and re-arrange their order.

3. Application of data encryption in computer security

3.1 Data Encryption technology used in e-commerce

E-commerce requires consumers to perform all consumption activities online without worrying about the theft of their bank cards. In the past, people used telephone services to reserve their desired consumer goods to prevent bank card passwords from being stolen. However, due to advances in the Times, encryption technology has been applied to various businesses, this ensures the security of bank card consumption, enables consumers to make online payments, and the use of encryption technology ensures the secure exchange of interests and information between consumers and both parties.

3.2 data encryption technology used in VPN

VPN, as its name implies, is a virtual private network. Most of these virtual private networks are used in international companies, and these companies have their own local networks, however, when it is easy to use, it will also worry about LAN security issues. However, due to the rapid development of technology, these problems are no longer a problem, people send all kinds of data they need to use to the Internet, and then the routers on the Internet are encrypted to transmit information, when the information arrives at the vro, It is decrypted by the vro. This prevents others from stealing information and allows users to see the information they actually need.

3.3 Data Encryption technology is used in Identity Authentication

Identity Authentication is widely used in computers and networks. asymmetric encryption technology can be used for identity authentication to identify a series of problems such as true and false digital signatures and counterfeiting, obtain a verified signature, and the receiver decrypts the signature. If the decryption is performed correctly, the signature is valid, and the identity of the other party is verified to facilitate further transactions.

3.4 Data Encryption technology is used in data

The other party that uses the encryption technology uses the same decryption key. Without the disclosure of both parties, the data can ensure the usefulness and integrity of the information, A general algorithm is used to encrypt binary data sources by dividing the information into 64-bit pairs and forming different groups. The 56-length decryption key is used to generate encrypted data, the parity code is used for verification, and each group is re-replaced and transposed to further perform the process of variation and computation, and finally generate the encrypted data source. Next, we will process each group in nine steps. The current output of each step is the input for the next step, and then undergo inverse initial replacement, this completes all the encryption processes. This encryption process ensures the security of data transmission and achieves the security effect of data transmission.

3.5 data encryption technology used in email

Email is used to transmit information. Nowadays, the network technology is becoming more and more advanced, so that information can be transmitted without meeting each other. However, this creates opportunities for some people to be opportunistic, in order to use email to impersonate others' names and information for fraud and theft of others' information, or in exchange for some benefits, however, online emails use data encryption to prevent information theft, this ensures the security of information and the confidentiality and integrity of emails, so that encrypted information and data can be stored and transmitted simultaneously, encryption technology can also be used in emails to check the integrity of the mail information, so that all basic information of the user can be confirmed.

4. Conclusion

According to the above information encryption technology, various information is encrypted and protected to ensure the cognitive, integrity and confidentiality of information transmission. Data encryption technologies include several methods that can be applied to society and various fields to further ensure computer security and network security, greatly improving the security performance and application performance of information in the network, in the future, people will be more assured to spread information on the Internet to share information more quickly, ensuring the authenticity, availability and security of information, and increasing trust in network encryption technology, in order to give full play to the application and value of data encryption technology in computer security.