ActiveAuth

ActiveAuth is a powerful yet easy to use solution which enables two-factor authentication for your wordpress site. 
The plugin can increase your online security and will protect your privacy by adding a second layer of identity verification to prevent access to your site by password hacking. 
The two-step verification (two-factor authentication) sends a second request, after you enter your ID and password on the website to your mobile device. 
Even if you are using are using the strongest password ever, you never can be sure if you are not a subject of password sniffing or hacker attack on the password database. 
By adding the 2nd layer of authentication, you remain secure even in the event your password for the first step is lost or stolen. 
Simple and efficient you can use Mobile Push (over data) SMS, or even a phone call for the 2nd step.

ActiveAuth is a powerful yet easy to use solution which enables two-factor authentication for your wordpress site.

4login

Secure your site with a strong password — without the hassle of remembering it. 
With 4Login, you get simple yet powerful authentication that connects to an external server. 
Simply create your own pattern to generate a dynamic password that updates every 60 minutes.
Please refer to the <a href="https://www.4login.jp/" rel="nofollow ugc">operation Instructions </a> for instructions on how to use 4Login.
<h3>External services</h3>
This plugin connects to an external API to enable 4Login authentication. 
When logging in with 4Login, the plugin sends the 4Login App Service ID, the user’s email address, and a dynamic password . 
These credentials are entered directly within the WordPress login interface.
This authentication service is provided by Passlogy. 
For more information, please review our 
<a href="https://www.4login.jp/en/auto_terms/" rel="nofollow ugc">Terms of Service</a> and 
<a href="https://www.4login.jp/privacy-policy/?en=app" rel="nofollow ugc">Privacy Policy</a>.

4Login for Secure And Smart Access

4Login will give you an easy and powerful authentication (connect to an external server for authentication).

ActiveAuth vs 4Login for Secure And Smart Access