- Service-specific two-factor (e.g., Steam authenticator, which provides other features beyond TOTP)
- Non time-based authenticators; Yubikeys are great, and appear to be made of some indestructible material that survives multiple trips through the wash.
- Google two-factor
- Service-specific two-factor (e.g., Steam authenticator, which provides other features beyond TOTP)
- Non time-based authenticators; Yubikeys are great, and appear to be made of some indestructible material that survives multiple trips through the wash.