Chebyshev Polynomial-Based Authentication Scheme in Multiserver Environment

Table 8

The comparison of computation cost.

Schemes	phases
Li [11]	15 × tH
	4 × tH
Qu [12]	11 × tH, 5 × tPM, 5 × tPA
	4 × tH + 2 × tPM
Amin [13]	10 × tH, 5 × tPM, 2 × tPA, 1 × tE/D
	5 × tH, 1 × tE/D
Jangirala [18]	21 × tH
	6 × tH
Han [19]	11 × tH, 2 × tE/D, 4 × tT
	4 × tH, 1 × tE/D
Ours	11 × tH, 6 × tT
	4 × tH, 2 × tT