About this plugin
The Google Authenticator plugin for WordPress gives you two-factor authentication using the Google Authenticator app for Android/iPhone/Blackberry.
If you are security aware, you may already have the Google Authenticator app installed on your smartphone, using it for two-factor authentication on Gmail/Dropbox/Lastpass/Amazon etc.
The two-factor authentication requirement can be enabled on a per-user basis. You could enable it for your administrator account, but log in as usual with less privileged accounts.
If You need to maintain your blog using an Android/iPhone app, or any other software using the XMLRPC interface, you can enable the App password feature in this plugin,
but please note that enabling the App password feature will make your blog less secure.
Credits
Thanks to:
Miguel Mendez Z for responsibly disclosing a CSRF account lockout vulnerability.
Oleksiy for a bugfix in multisite.
Paweł Nowacki for the Polish translation
Fabio Zumbi for the Portuguese translation
Guido Schalkx for the Dutch translation.
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Tobias Bäthge for his code rewrite and German translation.
Pascal de Bruijn for his “relaxed mode” idea.
Daniel Werl for his usability tips.
Dion Hulse for his bugfixes.
Aldo Latino for his Italian translation.
Kaijia Feng for his Simplified Chinese translation.
Alex Concha for his security tips.
Jerome Etienne for his jquery-qrcode plugin.
Sébastien Prunier for his Spanish and French translation.