Abstract: A data transmission method and apparatus are disclosed that resolves a technical problem where an existing data encryption algorithm offers poor security during transmission of data. The solution includes obtaining, by a first terminal, a data transmission request sent by a second terminal, the data transmission request at least carrying first encrypted data that is obtained by encrypting first exchange key of the second terminal by using a private key of the second terminal. The solution further includes decrypting, by the first terminal, the first encrypted data by using a public key of the second terminal to obtain the first exchange key, and obtaining a shared key of the first terminal and the second terminal according to the first exchange key. The solution further includes encrypting, by the first terminal, to-be-transmitted data by using the shared key to obtain encrypted to-be-transmitted data, and sending the encrypted to-be-transmitted data to the second terminal.

Abstract: A data transmission method and apparatus are disclosed that resolves a technical problem where an existing data encryption algorithm offers poor security during transmission of data. The solution includes obtaining, by a first terminal, a data transmission request sent by a second terminal, the data transmission request at least carrying first encrypted data that is obtained by encrypting first exchange key of the second terminal by using a private key of the second terminal. The solution further includes decrypting, by the first terminal, the first encrypted data by using a public key of the second terminal to obtain the first exchange key, and obtaining a shared key of the first terminal and the second terminal according to the first exchange key. The solution further includes encrypting, by the first terminal, to-be-transmitted data by using the shared key to obtain encrypted to-be-transmitted data, and sending the encrypted to-be-transmitted data to the second terminal.