=== Two-Factor === Contributors: georgestephanis, valendesigns, stevenkword, extendwings, sgrant, aaroncampbell, johnbillion, stevegrunwell, netweb, kasparsd, alihusnainarshad, passoniate Tags: two factor, two step, authentication, login, totp, fido u2f, u2f, email, backup codes, 2fa, yubikey Requires at least: 4.3 Tested up to: 6.0 Requires PHP: 5.6 Stable tag: 0.7.3 Enable Two-Factor Authentication using time-based one-time passwords (OTP, Google Authenticator), Universal 2nd Factor (FIDO U2F, YubiKey), email and backup verification codes. == Description == Use the "Two-Factor Options" section under "Users" → "Your Profile" to enable and configure one or multiple two-factor authentication providers for your account: - Email codes - Time Based One-Time Passwords (TOTP) - FIDO Universal 2nd Factor (U2F) - Backup Codes - Dummy Method (only for testing purposes) For more history, see [this post](https://georgestephanis.wordpress.com/2013/08/14/two-cents-on-two-factor/). = Actions & Filters = Here is a list of action and filter hooks provided by the plugin: - `two_factor_providers` filter overrides the available two-factor providers such as email and time-based one-time passwords. Array values are PHP classnames of the two-factor providers. - `two_factor_enabled_providers_for_user` filter overrides the list of two-factor providers enabled for a user. First argument is an array of enabled provider classnames as values, the second argument is the user ID. - `two_factor_user_authenticated` action which receives the logged in `WP_User` object as the first argument for determining the logged in user right after the authentication workflow. - `two_factor_token_ttl` filter overrides the time interval in seconds that an email token is considered after generation. Accepts the time in seconds as the first argument and the ID of the `WP_User` object being authenticated. == Screenshots == 1. Two-factor options under User Profile. 2. U2F Security Keys section under User Profile. 3. Email Code Authentication during WordPress Login. == Get Involved == Development happens [on GitHub](https://github.com/wordpress/two-factor/). == Changelog == See the [release history](https://github.com/wordpress/two-factor/releases).