Research on Manhattan Distance Based Trust Management in Vehicular Ad Hoc Network

Table 1

Comparison of researches considering distance.

Approach	Trust metric	Architecture	Advantage	Disadvantage
Minhas et al. [7]	✓Time closeness	Centralized	Easy to find malicious vehicles.	No discussion of the calculation method of distance.
	✓Location closeness (distance)
	✓Experience
	✓Role
Raya et al. [10]	✓Time	Distributed	Easy to find false messages.	No discussion of the calculation method of distance.
	✓Distance
	✓Node type
	✓Event type
Wu et al. [11]	✓Distance	Centralized	Easy to find false messages.	No discussion of the calculation method of distance.
	✓Number of sensors
	✓Node type
Shaikh et al. [13]	✓Location closeness (distance)	Distributed	Easy to implement in VANETs.	No discussion of the calculation method of distance.
	✓Time closeness
	✓Location verification
	✓Time verification
	✓Number of senders
Yang et al. [14]	✓Distance	Distributed	Provide security trust management method using blockchain.	No discussion of the calculation method of distance.