![Authentification Guide — Two authenticators](https://guide.duo.com/static/images/en/security-key-auth-firefox_2x.png)
Use Security Keys with the Traditional Duo Prompt - Guide to Two
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A Guide to Common Types of Two-Factor Authentication on the Web
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Types of two-factor authentication, pros and cons: SMS
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Certified Authenticator Levels - FIDO Alliance
How to set up the Two-Step Authorization (Google Authenticator
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A guide to common types of two-factor authentication
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Types of two-factor authentication, pros and cons: SMS
![Authentification Guide — Two authenticators](https://files.readme.io/11fc487-3.image.png)
Enabling Two-Factor Auth
![Authentification Guide — Two authenticators](https://help.ui.com/hc/article_attachments/360040740394/2FA.png)
Token2, MFA tokens OATH-TOTP SHA-1 SHA-256