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In this test, we add one more observation node (Node 4) to avoid systemic error.
In addition, when the scenario runs normally, the flag bit in the data packet is 55 according to the Wireshark software.
In the panel, the data tampering attack experiment is also carried out on Node 5. That is to say, we assume that the downlink control measurement packets from central station to three substations are tampered at Node 5 into heartbeat packets.
Here is the result in the right side. It can be noticed that the flag bit in the data packet has been changed to 99, and the three substations refuse to move and think themselves can normally communicate with the central station.
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