The present application discloses a method, device, and system for data transmission. The system includes a first terminal having an associated terminal ID and a server. At least one of the first terminal and the server establishes a channel between the first terminal and the server based at least in part on the terminal ID, the channel corresponding to a communication channel that is to be used by the first terminal and the server to communicate data. The terminal ID is used to authenticate the first terminal in connection with the channel being established between the first terminal and the server.