Data transmission method and system based on dynamic key

The invention discloses a data transmission method and system based on a dynamic key, and relates to the field of data security, and the method comprises the steps that a server generates a key pool based on a generative adversarial network; each key in the key pool is a generative adversarial model obtained by training the generative adversarial network through different training sets; the server randomly selects a key from the key pool as a communication key for communication between the data sender and the data receiving method; the data sender encrypts a plaintext message to be sent by using the communication key to obtain a ciphertext message; the data sender encrypts and verifies the ciphertext message, and sends the ciphertext message to the data receiver if the ciphertext message passes the encryption and verification; and the data receiver decrypts the received ciphertext message by using the communication key to obtain a plaintext message. According to the invention, the security of data transmissio