The Application of Data Encryption Technology in Computer Network Information Security

The application of Internet technology in People's Daily production and life has obvious two sides. While providing convenience to people, it also brings huge information security risks to people. Because of the openness, sharing and inclusiveness of computer network, information data is faced with a series of security risks, such as virus intrusion, hacker attack and so on. In order to improve the security of computer Internet information technology, this paper makes an in-depth analysis of computer network information security and data encryption technology. Information security problems in the use of computer networks mainly include the following points: First, there are loopholes in the network system itself, which makes hackers can easily attack and steal data. Second, the virus spreads extremely quickly, and once infected, it can cause the entire system to crash. Finally, it is difficult to crack down on cyber crimes, and hackers can hide their true identities through the network, which makes it extremely difficult to hold them legally responsible. In view of the above problems, the strategy of computer network information security construction mainly includes the following points: First, we need to strengthen the construction of network security system, including firewall, intrusion detection system, etc. Second, we need to strengthen virus prevention, regular system upgrade and virus detection and killing. Finally, we need to strengthen network security education to improve users' security awareness and operational skills. The mainstream data encryption technologies mainly include hybrid algorithm, DES algorithm and DH algorithm. The hybrid algorithm combines the advantages of public key cryptography and symmetric cryptography, and has high security. DES algorithm is a symmetric cryptographic algorithm, and its encryption and decryption processes are faster. DH algorithm is a kind of public key cryptography algorithm, which has high security but large computation. In order to protect data security, data encryption technology can be adopted to ensure the security of Internet data information transmission. In this paper, the data encryption technology is briefly described, and other algorithms such as hybrid algorithm and DES are compared. By testing its decryption efficiency and security, we put forward the data encryption technology with higher security level in computer network information security, and better ensure the application security of Internet information technology.