Retransmission data processing device, retransmission data communication device, retransmission data communication system, retransmission data processing method, retransmission data communication method, and non-transitory computer readable medium for detecting abnormality by comparing retransmission data to transmission data

摘要

A data generation device 101 transmits communication data bound for a data receiving device 105 from a transmission unit, and a monitoring device 103 receives the communication data. The monitoring device 103 requests retransmission of the communication data to the data generation device 101, and the data generation device 101 retransmits the communication data from a retransmission unit being different from the transmission unit. The monitoring device 103 receives retransmission data retransmitted from the retransmission unit, compares the communication data with the retransmission data. If the communication data and the retransmission data are identical, the monitoring device 103 transmits the communication data to the data receiving device 105. If the communication data and the retransmission data are not identical, the monitoring device 103 transmits a message which notifies that the communication data and the retransmission data are not identical to the data generation device 101.