A Provably Secure Authentication and Key Exchange Protocol in Vehicular Ad Hoc Networks

Table 6

Comparison of communication and massage rounds.

Scheme	Communication cost (bits)	Massage rounds
Liu et al.	2496	4
Jia et al.	4384	4
Ma et al.	3904	4
Eftekhari et al.	5568	4
Our scheme	3456	4