Abstract: Various examples relating to a device and a method for providing a message service are provided. A message service method, according to one example, comprises the steps of: receiving, from a transmission terminal, a cancelation request for canceling a transmission message transmitted to at least one reception terminal; determining whether the transmission message for each of the at least one reception terminal can be cancelled; and transmitting a transmission message cancelation command signal to a reception terminal for which the transmission message can be cancelled among the at least one reception terminal, wherein the at least one reception terminal is capable of including a plurality of terminals associated with the same user account. Various examples can be implemented in addition to the one example.

Abstract: A system determines access authorization to data in an electronic device by detecting application identifier information of an application program and detecting manufacturer identifier information of the application program. The system generates access token information using the application identifier information of the application program and the manufacturer identifier information.