A recording medium stores a communication program executed by communication devices and causing: a first computer of a first communication device, on a side of providing data, to register first metadata including the data and attribute information; a second computer of a second communication device, on a side of using the data, to register second metadata including a processing service when processing and using the data and attribute information; the first computer to determine whether or not to approve the processing service based on the first and second metadata; and when the determination of whether or not to approve is to approve, a third computer of a third communication device, on a side of processing the data, to execute data processing based on the processing service in a data processing environment that disapproves access from the first and second communication devices to the data and the processing service.