2FAn
2FAn is not a widely used or formally defined term in security literature. In many contexts, it appears to be a typographical variant or misspelling of 2FA (two-factor authentication), or a shorthand used in informal texts. No major standard, protocol, or organization defines “2FAn” as a distinct concept.
Two-factor authentication (2FA) is a security mechanism that requires two independent credentials to verify a user's
If you encounter the term 2FAn, determine whether the context intends standard 2FA or is referring to
Security considerations: 2FA generally improves security by reducing reliance on a single credential but does not