LAAP: Lightweight Anonymous Authentication Protocol for IoT Edge Devices Based on Elliptic Curve

Table 7

Average cost in the certification phase.

Num.	D-Cost (ms)	S-Cost (ms)	Aut-efficiency
200	58.11	63.21	100%
400	56.98	65.79	100%
600	56.43	64.33	100%
800	57.21	63.31	100%
1000	56.45	62.75	100%
1200	58.97	65.21	100%

Num.: number of devices; D-Cost and S-Cost: average cost at device and serve, respectively.