FIDO  security keys are small USB dongles that enable secure login to websites and applications supporting FIDO2 WebAuthn and classic FIDO (U2F) standards. 

Token2 T2F2 security key combines hardware-based authentication, public-key cryptography, HOTP, U2F, and FIDO2 protocols to protect your accounts. This type of security devices provides the highest level of multi-factor authentication of user accounts with Twitter, Facebook, Gmail, GitHub, Dropbox, Dashlane, Salesforce, Duo, Centrify and hundreds more HOTP, U2F, and FIDO2 compatible services. No additional tools or applications are required and the login process is simple and reliable. Just insert the Security Key into a USB-A slot and authenticate with a simple touch. We also sell a compact USB-A to Type-C adapter so you can use the same key with devices with USB-Type-C slots. The T2F2 security key does not require a battery nor network connectivity so it is always on and accessible.

Specifications

Integration guides

Using Your T2F2 Security Key with Google

Passwordless authentication in Azure AD with Token2 FIDO2 keys

FIDO U2F security key for Stripe

Using FIDO2 USB keys under Linux