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The FIDO2 Project is a joint effort between the FIDO Alliance and the World Wide Web Consortium (W3C) whose goal is to create strong authentication for the web. At its core, FIDO2 consists of the W3C Web Authentication ( WebAuthn ) standard and the FIDO Client to Authenticator Protocol 2 (CTAP2). [ 6 ]
An early Windows Insider release of Microsoft Edge (Build 17682) implemented a version of WebAuthn that works with both Windows Hello as well as external security keys. [ 27 ] Existing FIDO U2F security keys are largely compatible with the WebAuthn standard, though WebAuthn added the ability to reference a unique per-account "user handle ...
An authenticator that implements CTAP2 is called a FIDO2 authenticator (also called a WebAuthn authenticator). If that authenticator implements CTAP1/U2F as well, it is backward compatible with U2F. The protocol uses the CBOR binary data serialization format. The standard was adopted as ITU-T Recommendation X.1278. [6] [1]
Universal 2nd Factor (U2F) is an open standard that strengthens and simplifies two-factor authentication (2FA) using specialized Universal Serial Bus (USB) or near-field communication (NFC) devices based on similar security technology found in smart cards.
First YubiKey USB token of the FIDO standard in 2014. The YubiKey is a hardware authentication device manufactured by Yubico to protect access to computers, networks, and online services that supports one-time passwords (OTP), public-key cryptography, authentication, and the Universal 2nd Factor (U2F) and FIDO2 protocols [1] developed by the FIDO Alliance.
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The development of open standards such as FIDO2 and WebAuthn have further generated adoption of passwordless technologies such as Windows Hello. On June 24, 2020, Apple Safari announced that Face ID or Touch ID would be available as a WebAuthn platform authenticator for passwordless login.
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