As WordPress security consultants we always recommend our customers to use two-factor authentication for their WordPress blogs and websites to boost the security of the WordPress login and protect them from brute force attacks.
Lately we discovered Rublon and started recommending it. It is an easy to install and setup WordPress plugin that makes two-factor authentication for WordPress practical.
Unlike existing two-factor solutions for WordPress, where users have to enter a one-time code provided to them on their smartphone each time they have to login (making the login sequence a bit impractical and lengthy), with Rublon users only have to use a smarthphone app once to build a list of trusted devices.
Once Rublon is setup you can login to your WordPress by only providing a username and password, as usual. Then let Rublon do the additional security checks for you and protect your WordPress login with two-factor authentication.
We would definitely recommend every WordPress owner and administrator to install and setup Rublon. It is a must have WordPress security plugin.