Term of the Moment
classical vs. quantum computing
Redirected from: FIDO2
Definition: FIDO
(1) For email, see FidoNet.
(2) (Fast IDentity Online) A technology from the FIDO Alliance that authenticates a user logging into an online service without having to enter username and password. Founded in 2013, the Alliance introduced biometric and two-factor authentication a year later.
FIDO UAF and FIDO U2F
UAF (Universal Authentication Framework) is the biometric protocol, and U2F (Universal Second Factor) supports PINs and USB keys. See two-factor authentication and USB key.
FIDO2
FIDO2 uses WebAuthn (Web Authentication specification) and FIDO's CTAP (client-to-authentication protocol) to enable smartphones to work as authenticators. See WebAuthn.
FIDO Client/Server Interaction
A FIDO-Certified USB Key
(2) (Fast IDentity Online) A technology from the FIDO Alliance that authenticates a user logging into an online service without having to enter username and password. Founded in 2013, the Alliance introduced biometric and two-factor authentication a year later.
FIDO UAF and FIDO U2F
UAF (Universal Authentication Framework) is the biometric protocol, and U2F (Universal Second Factor) supports PINs and USB keys. See two-factor authentication and USB key.
FIDO2
FIDO2 uses WebAuthn (Web Authentication specification) and FIDO's CTAP (client-to-authentication protocol) to enable smartphones to work as authenticators. See WebAuthn.
When a user opens an account, the FIDO client registers with the provider's server. At login, the server sends the FIDO client a challenge, which is a value that will be returned encrypted with a digital signature. See public key cryptography and digital signature.
This YubiKey FIPS is certified for FIDO second-factor authentication, and it meets federal standards (see FIPS 140-2). (Image courtesy of Yubico, www.yubico.com)