YubiKey C Bio - FIDO Edition



Note: This article lists the technical specifications of the YubiKey C Bio - FIDO Edition. If you're looking for setup instructions for this key, see https://yubi.co/bio.


The YubiKey C Bio - FIDO Edition provides the FIDO2 application as well as the U2F application, allowing for greater flexibility. To find out if an application is compatible with the YubiKey C Bio - FIDO Edition, browse to the Works With YubiKey Catalog, and in the Series drop-down, select YubiKey Bio Series to only display services that are compatible with it.



The YubiKey C Bio - FIDO Edition uses a USB 2.0 interface. All applications are available over this interface.




The FIDO2 application allows for secure single and multi-factor authentication, and can store up to 25 discoverable credentials (100 with firmware 5.7+). These credentials, which are protected by user verification (PIN or fingerprint), enable passwordless login, where the YubiKey, unlocked by user verification and authorized by touch, can log you in to your accounts without entering a username or password. For FIDO certification information, see YubiKey Hardware FIDO2 AAGUIDs.


USB Interface: FIDO


More about FIDO 2



The U2F application can hold an unlimited number of U2F credentials.


USB Interface: FIDO


More about FIDO U2F



Physical Specifications

Form Factor

Connector: USB-C
Dimensions: 18mm x 45mm x 3.75mm
Weight: 5.0g



Operational range: 0 °C to 40 °C (32 °F to 104 °F)
Storage range: -20 °C to 85 °C (-4 °F to 185 °F)