Hierarchical Hybrid Trust Management Scheme in SDN-Enabled VANETs

Algorithm 2

Hybrid trust calculation.

	Input DIS, TV, HTthre
	Output HT
	if vehicle i receives interactive information from vehicle j then
	Use Algorithm 1 to solve the ST and RT of the vehicle
	if Vehicle i is within the coverage of RSU then
	Calculate DCij using equation (8)
	Calculate using equation (9)
	Calculate IT using equation (10)
	else
	IT = 0
	end if
	Calculate HT using equation (11)
	end if
	if HT ≥ HTthre then
	Confirm that vehicle j is a trusted vehicle
	Continue to receive interactive information from vehicle j
	else
	Confirm that vehicle j is a dishonest vehicle
	Discard the interaction request information of the vehicle
	end if
	Upgrade the trust management information of vehicle j in the LTD of vehicle i
	Broadcast the trust management upgrade information of vehicle i