The plugin can be used to implement authentication and registration systems for Rail-driven sites.
Here are some key features of "Authfactor":
· Supports one-time passwords from a variety of sources
· Yubikey support
· Google Authenticator support
· SMS support (using Twilio)
· Phone support (using Twilio)
· Phone/SMS can be used as a backup source as well
· Paper one-time passwords can be used as a backup
· Full example application provided
· Very flexible, use only the features you need
· Easy configuration in application.rb
· Sample app works out of the box (including on Heroku)
Requirements:
· Ruby on Rails 3 or higher