Modern two-factor that people love to use: strong authentication without passwords or tokens; single sign on/off; magical login experience.
The Most Comprehensive and Highest-Rated Security System for WordPress (formerly the WordPress Simple Firewall).
Google Authenticator and Best Enterprise Grade Two Factor Authentication. Fully supported, Latest Authentication methods. Remember Device,Authy,Email.
Instant account security with effortless, email-based two-factor authentication; optional mobile app for more security; no tokens.
Sucuri Security Website Firewall (CloudProxy) is a subscription based WAF and Cloud-based IPS designed to provide optimal security to everyday website
Adds an extra layer of security to your WordPress Account. Same as Google 2-step verification.
Modifies the Google Authenticator plugin so that only users with 2FA enabled are prompted for the authentication token.
LaunchKey eliminates the need and liability of passwords by letting you log in and out of WordPress with your smartphone or tablet.
Use the SecSign ID two-factor authentication on your WordPress site to enable easy and secure login using your iPhone or Android phone.
Allows administrators to either nag users to enable two-factor authentication, or force them to enable it.
Allows you to verify telephone number when they submit a message using Contact Form 7
2FAS - Two Factor Authentication strengthens WP-admin security by requiring an additional verification (Token, SMS, VMS) code on untrusted devices.
SUA – Secure User Account WordPress Login is a plugin that will allow you to secure your account
OneID is an easy-to-integrate plug-in that lets your users log in with a click or tap, eliminating the need for usernames and passwords.
2FAS Light - Use Google Authenticator app to strengthen WP-admin security by requiring token on untrusted devices.
Make usernames and passwords obsolete. SnapID identifies and authenticates when you send a text message. Completely secure, incredibly convenient.
This plugin enables user enrollment and authentication against any standard OpenID Provider (OP).
This plugin enables two-factor authentication for WordPress logins with mobile phone push over data, text messages, and even a phone call.
Proper security for your WordPress site.
Enables your users to log in to your site without manually entering the password. Instead, user just taps one button on his phone.
UNLOQ provides a free, easy to use and integrate, strong authentication systems that replaces passwords with your phone.
Fortytwo’s 2FA plugin controls access to your site by sending an authentication code via SMS to your mobile phone when you register or login.
Secure two-factor authentication made simple. Lets administrators secure their sites against password attack, and users secure their content.
SuperAuth is the truly passwordless authentication system. No passwords, no usernames, no typing, nothing to forget, and completely secure.
A plugin to implement Vasco's MYDIGIPASS.com two-factor authentication service into your blog.
A simple plugin that adds two step verification via selected instant messenger.
Protect your WordPress using Pontopass' two-factor authentication and security policies.
Secure login to your site by tapping just one button on the phone, no password required.
Ozioma is a unified enterprise messaging platform for Bulk SMSing, phonebook contact services, SMS campaign, Free SMS, SMS forwarding, etc.
WordPress Strong Authentication lets you authenticate users with a second factor of possession like OTP, EMail or SMS. Only if the user is able to pro