Universal 2nd Factor

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.[1][2][3][4][5] It is succeeded by the FIDO2 Project, which includes the W3C Web Authentication (WebAuthn) standard and the FIDO Alliance's Client to Authenticator Protocol 2 (CTAP2).[6]

While initially developed by Google and Yubico, with contribution from NXP Semiconductors, the standard is now hosted by the FIDO Alliance.[7][8]

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  3. ^ Cite error: The named reference USB key drive could remove the hassles was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference FIDO Universal 2nd Factor was invoked but never defined (see the help page).
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  6. ^ "An In-Depth Guide to FIDO Protocols: U2F, UAF, and WebAuthn (FIDO2)".
  7. ^ Cite error: The named reference FIDO Alliance standards was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Google Accounts Now Support Security Keys was invoked but never defined (see the help page).