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Table 3 Communication overhead

From: ToAM: a task-oriented authentication model for UAVs based on blockchain

Phase Information category Length (bytes)
Group building mUAV calls the smart contract and queries the UAV’s public key 128 + 654
Send the ticket and time stamp to UAV 28 + 4
Send the ticket and related signatures to BS 28 + 20
mUAV calls the smart contract and queries the related information 128 + 20
Send the pre-shared key and time stamp to UAV 20 + 4
Intra-group authentication The initiator UAV sends its ID 128
The receiver searches the hash value in the chord ring 20(Log2(N) + 1)