SAIFC: A Secure Authentication Scheme for IOV Based on Fog-Cloud Federation

Table 5

Comparison of the different schemes in terms of communication costs.

No	Schemes	HF	ECC	PKE	PKD	SKE	SKD	Total cost	Total cost (ms)
1	[21]	35 Thf	4Teccm	0TPKe	0TPKd	0TSKe	0TSKd	35 Thf + 4Teccm	8.9845
2	[11]	8 Thf	11Teccm	0TPKe	0TPKd	0TSKe	0TSKd	8 Thf + 11Teccm	24.5044
3	[15]	10 Thf	6Teccm	0TPKe	0TPKd	0TSKe	0TSKd	10 Thf + 6Teccm	13.5518
4	[19]	9 Thf	7Teccm	0TPKe	0TPKd	0TSKe	0TSKd	9 Thf + 7Teccm	15.8043
5	[20]	13 Thf	8Teccm	0TPKe	0TPKd	0TSKe	0TSKd	7 Thf + 8Teccm	17.8379
6	[18]	17 Thf	0Teccm	0TPKe	0TPKd	0TSKe	0TSKd	17 Thf	0.0391
7	[17]	17 Thf	0Teccm	0TPKe	0TPKd	0TSKe	0TSKd	17 Thf	0.0391
8	[14]	12 Thf	0Teccm	0TPKe	0TPKd	2TSKe	2TSKd	12 Thf + 2TSKe + 2TSKd	0.046
9	[13]	20 Thf	0Teccm	0TPKe	0TPKd	0TSKe	0TSKd	20 Thf	0.046
10	SAIFC	30 Thf	8Teccm	0TPKe	0TPKd	0TSKe	0TSKd	30 Thf + 8Teccm	17.877