TeddyID Password Manager
Users will have to enter a password only once, TeddyID will suggest encrypting and saving the password. The next time the user tries to log in, the user just clicks his username (see the screenshot), we pick a random picture and send it to user's two devices: his computer and his phone (with our free app installed). The user makes sure the pictures match and taps "Yes" on his phone. We decrypt the password, fill it in, and submit the form. Login complete.
With TeddyID Password Manager your users won't have to remember, nor type, the password for your site. This is a free service for Joomla based sites.