[Retracted] Fog-Driven Secure Authentication and Key Exchange Scheme for Wearable Health Monitoring System

Table 6

Performance optimization ratio.

	Computational performance speed (times)	Communication performance speed (times)
Our scheme	1	1
[24]	3.784	1.854
[25]	1.578	1.563
[26]	2.618	2.521
[28]	4.569	1.854
[29]	2.621	1.563