FIELD: information technology.
SUBSTANCE: invention relates to providing security in data transmission networks. Method for preventing reuse of digital data packets in a network data transmission system, in which obtaining, in a selected gateway, payload data for each sent packet, generating metadata for each sent packet, metadata including a packet number, a data packet sending time, metadata integrity checking data, sending a packet from the selected gateway through the data transmission network, establishing, on a computer receiving messages, the mismatch time tolerance value, storing the sending time and number of the last received packet, the list of numbers of previously received data packets from each sender in the memory of the receiving computer, receiving a packet which includes payload data and metadata, validating metadata integrity of the received packet, using the metadata integrity checking data, checking for re-reception of the received packet, receiving a packet which includes payload data and metadata, validating metadata integrity of the received packet, using the metadata integrity checking data, checking for re-reception of the received packet, wherein if the time of sending the received packet exceeds the time interval of the mismatch, then rejecting the packet, if the time for sending the packet is within the time interval of the discrepancy, then the packet is received.
EFFECT: preventing repeated reception of digital data packets in a network data transmission system.
1 cl, 3 dwg, 1 tbl
