A wearable device transmits a service request generated by the wearable device to a server, where the service request is associated to a service application type. The wearable device receives an identity authentication request message associated to the service application type from the server using a preset standard interface. The wearable device verifies a signature in the identity authentication request message according to a public key of the service application type. In response to verifying the signature, the wearable device retrieves service authentication information of an account corresponding to the identity authentication request message from a locally pre-stored service authentication information database. The wearable device transmits a verification response message comprising the acquired service authentication information to the server using the preset standard interface.