FIELD BUS-BASED DATA TRANSMISSION METHOD AND SYSTEM, AND FIELD BUS-BASED IDENTITY VERIFICATION METHOD AND SYSTEM

摘要

Disclosed in the present invention are a field bus-based data transmission method and system, a field bus-based identity verification method and system, a device, and a medium. The data transmission method comprises: generating master station identity plaintext data; encrypting the master station identity plaintext data to generate master station identity ciphertext data; and sending the master station identity ciphertext data to a slave station. In the present invention, on the basis of original communication data of a master station and the slave station, the master station identity plaintext data is independently generated and encrypted for identity verification between the master station and the slave station, after the slave station receives the encrypted data sent by the master station, the master station can obtain a permission of normal communication with the slave station only after the data is successfully decrypted and verified, and since the independently generated master station identity plaintext data occupies a small space for working data, the security of data transmission between the master station and the slave station is greatly improved on the premise of not influencing the normal communication efficiency between the master station and the slave station.