Two-Factor Authentication for WordPress

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Two-Factor

Two-Factor Authentication for WordPress

Description : Enable Two-Factor Authentication using time-based one-time passwords (OTP, Google Authenticator), Universal 2nd Factor (FIDO U2F, YubiKey), email and backup verification codes.

Github: https://github.com/georgestephanis/two-factor
Website: https://stephanis.info/2013/08/14/two-cents-on-two-factor/