Add-Ons By Simtech Development: Two-Factor Authentication By Duo

Dear Friends,

We have developed the Two-Factor Authentication by Duo add-on that allows to protect your store against remote attacks.

You will need to have Duo Mobile application installed on your smartphone. It is available for iPhones, Androids, BlackBerry and many more.

The first factor is your username and password for the primary authentication. The second factor can be:

- code from Duo Mobile;

- push notification;

- phone call.

Push notifications are strongly recommended by Duo as a second factor.

How it works

Start authorizing in the store by entering your username and password.


You’ll be suggested to select a method for the second step of authentication.


Let’s select Push notification.


Slide to view the push notification.


Choose Approve.


Your login request has been approved. Authorization is successful. You have logged in to the admin panel of your store.

User Guide

Learn more about the add-on in the User Guide.


The add-on is compatible with CS-Cart and Multi-Vendor 4.3.1 and above. Need compatibility with another CS-Cart version? Contact us.

Buy the Add-on

I will be glad to answer all your questions about the add-on.

P.S. Do not forget to join us on Facebook to be the first to know about great solutions for your store!


The window for the second step of authentication was displayed incorrectly on mobile devices. Now it is fixed.

Two-Factor Authentication by Duo add-on uses Duo Mobile application as a second factor for authorization.


We have refactored styles in the Two-Factor Authentication by Duo add-on. Also the window for the second step of authentication has been adapted to the height of the screen.