For information on changes for our US clients, please visit our Support Center article.

Using a Security Key for two-factor authentication (2FA)
A Hardware Security Key is a small physical device used for additional security next to your password and is considered to be one of the most secure ways of two-factor authentication (2FA). Most Hardware Security Keys are very simple and you only need to touch or tap a button while it is plugged into the USB port of your device.
At this moment only sign-in 2FA can be secured with both FIDO2 and Yubico OTP protocols. Sign-in 2FA and the Master Key support Hardware Security Keys that use the FIDO2 protocol. Funding 2FA only supports the Yubico OTP protocol.
Functions
Available Hardware Security Key protocols
Sign-in 2FA
FIDO2
Trading 2FA
None
Funding 2FA
Yubico OTP
Master Key
FIDO2
Each function needs to be set up separately. To learn more about the 2FA functions above, you can review this support article.

Hardware Security Keys frequently asked questions:

Why should I use a Hardware Security Key instead of an authenticator app?
Where can I get a Hardware Security Key?
How to set up a Hardware Security Key on Kraken
How to update Sign-in 2FA from YubiKey OTP to a FIDO2 Hardware Security Key
I lost my Hardware Security Key!
What is Yubico OTP?
What is FIDO2?
What is a FIDO2 PIN?