5sec Google Authenticator 2-Step Login Protection v1.20
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two-step login process adds extra protection to your site
no extra SMS charges or anything similar
nobody can hack you even if they know your password
nobody can login to your account without your phone and a freshly generated OTP
per-user option for enabling/disabling two-step authentication
protect your site from users who love to click “remember my password”
auto log-out feature to ensure nobody uses the admin after you do
complete brute-force attack protection with 5 options to fine tune ban rules
IP whitelist option for brute-force protection
mobile apps available for iPhone, iPad, Android & BlackBerry
if your phone dies or gets lost there’s a secret URL (uniquely generated for each site) you can use to log in with only username & password
QR codes are automatically sent to new users, or you can always email them later via the user’s screen (as many users as needed can be emailed at once)
famous 5sec concept for easy setup & usage
easy-to-use native WordPress GUI
detailed documentation and in-line help on every step
more details on http://5sec-google-authenticator.webfactoryltd.com/