Eric Mann

Add support for <a href="https://en.wikipedia.org/wiki/Time-based_One-time_Password_Algorithm" rel="nofollow ugc">time-based one-time-password authentication</a> to WordPress. Once enabled, you can use an application on your phone (<a href="https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2&hl=en" rel="nofollow ugc">Google Authenticator</a>, <a href="https://www.microsoft.com/en-us/store/apps/authenticator/9wzdncrfj3rj" rel="nofollow ugc">Windows Authenticator</a>, etc) to generate TOTP tokens and protect your account from prying eyes.

Dovedi

Time-based One Time Password authentication for WordPress.

matrixplatform

TeddyID Lite allows your users to log in without entering a password, yet more securely.
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 Lite, your users won’t have to remember, nor type, the password for your site. This is a free service for WordPress based sites.
Nothing is changed in your wordpress database. Passwords are encrypted/decrypted only in browser.

Teddy ID Lite

Enables your users to log in to your site without manually entering the password. Instead, user just taps one button on his phone.

Dovedi vs Teddy ID Lite