Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Scheme comparison. TOTP, Time-based One-Time Password.
| Scheme | Resistance to Leakage Attacks | Infinite OTPs | OTPs’ Validity Is Limited in Time | Ease of Implementation |
|---|---|---|---|---|
| Lamport’s OTP | + | − | − | + |
| TOTP | − | + | + | + |
| T/Key | + | − | + | + |
| SmartOTPs | + | − | − | − |
| MOTP | + | − | + | + |
