Table 4.

Performance comparison in password change phase.

Scheme	MN	FA	HA	Total
Jiang et al.	2H	N/A	N/A	2H	≈ 0.0010 s
Wen et al.	2H	N/A	N/A	2H	≈ 0.0010 s
Shin et al.	4H	N/A	1H + 1E	5H + 1E	≈ 0.5245 s
Gope and Hwang	2H	N/A	N/A	2H	≈ 0.0010 s
Farash et al.	6H5	N/A	5H	11H	≈ 0.0055 s
Ours	6H	N/A	5H	11H	≈ 0.0055 s