Information security engineer refers to a person who has passed the national vocational qualification examination organized by Ministry of Human Resources and Social Security and the Ministry of Industry and Information Technology and obtained the certificate of information security engineer, indicating that he has the level and ability to work in information security professional posts. The employer may, according to the relevant provisions of the "Regulations on the Trial Implementation of the Position of Engineering and Technical Personnel" and the needs of the work, select the best engineers.

The course of information security engineer in information network is taught by doctor of information security and master of information security engineer. At the same time, it includes self-made internal counseling materials and supplies, and compiles its own information security engineer question bank. By studying in the information network, the passing rate of candidates can be greatly improved.

Digital encryption mainly goes through the following processes:

When the information sender needs to send information, a symmetric key is generated first, and the message to be sent is encrypted with the symmetric key.

The sender encrypts the symmetric key with the public key of the receiver.

The information sender combines the results of the first step and the second step and sends them to the information receiver, which is called a digital envelope.

The information receiver decrypts the encrypted symmetric key with his own private key, and then the sender decrypts the encrypted ciphertext with this symmetric key to get the real original text.