Chebyshev Polynomial-Based Authentication Scheme in Multiserver Environment

Table 7

The security feature comparison among the schemes.

Schemes	Li [11]	Qu [12]	Amin [13]	Jangirala [18]	Han [19]	Ours
Password-guessing	✗	✓	✓	✓	✓	✓
User’s anonymity	✓	✓	✓	✓	✓	✓
Two-factor	✗	✓	✓	✗	✓	✓
Known session-specific temporary information	✗	✓	✓	✗	✗	✓
Session-key perfect forward	✗	✓	✗	✗	✓	✓
User impersonation	✗	✗	✓	✗	✗	✓
Server impersonation	✓	✓	✓	✓	✓	✓
Man-in-the-middle	✓	✞^1	✞^1	✞^1	✞^1	✓
Replay	✓	✓	✓	✓	✓	✓
Parallel session	✞^1	✞^1	✞^1	✞^1	✞^1	✓

¹Untouched.