We’ve put together this guide to define each FIDO specification and give you the details of their differances. With all these acronyms flying around, it can be a challenge to keep up with all these differing specifications. Since arriving on the scene, the FIDO Alliance has published three specifications: Universal 2nd Factor (U2F), Universal Authentication Framework (UAF), and FIDO2, the last of these comprising the Web Authentication (WebAuthn) and Client to Authenticator Protocol 2 (CTAP2). This includes fingerprint, biometrics, One-Time Passwords (OTP), Trusted Platform Modules (TPM), USB security tokens, near-field communication (NFC), and Bluetooth for mobile devices-with API support to handle the heavy lifting for developers. Based on public key cryptography, FIDO is a set of protocols designed to support authentication of just about any type. It’s a fitting name for man’s best friend, and just as appropriate in the security world, where trust is key.Ī more technical reference, FIDO (Fast IDentity Online), emerged in 2012 and is backed by a range of big tech and finance players like PayPal, Lenovo, Google, Visa, and Microsoft, known collectively as the FIDO Alliance.
FIDO is an acronym that comes from the Latin fido, meaning ‘to trust’, which was popularised by Abraham Lincoln-who borrowed it to name his dog.
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