# Certificates

The Certificates page of the Single Sign-On application allows you to upload a self-signed certificate to use to establish the https connection. The Certificates page lets you ensure a secure authentication when using EI Tunnel Manager.

If you do not already have a certificate, EI Tunnel Manager automatically creates one for you.

To add a certificate, click on Upload on the top left corner of the Certificates page.

The Upload Certificate pop-up appears.

You can also check the File Protected By Password checkbox to create a password for the uploaded file.