The invention discloses a broadcasting method and device which are used for improving security of broadcast contents and preventing a case that a broadcast receiver is controlled by a counterfeiter. The broadcast sending method provided by the invention comprises the steps that: when a broadcast sender needs to send broadcast data to the broadcast receiver, the broadcast sender executes a process of requesting the broadcast receiver for authentication; after determining that the process of requesting the broadcast receiver for authentication is executed successfully, the broadcast sender determines a receiving identifier for indicating the broadcast receiver to receive the broadcast data currently sent by the broadcast sender; and the broadcast sender sends the broadcast data to the broadcast receiver according to the receiving identifier.