Welcome to the forum!
Are you referring to the certificates of the device? If yes, you need to update or re-install the software using the Nokia Suite.
You can use this link to download the Nokia Suite: www.nokia.com/nokiasuite
By using the Nokia Suite, you can be sure that your contacts, messages, calendar entries, tasks, web feeds, and other important stuff are backed up safely. The contents of your phone memory and memory card, such as photos and videos, are safe and won’t be affected during the update.
You can follow the steps below to back up the files:
Connect the phone you want to back up to your computer with a USB cable. On your phone, select Nokia Suite (or PC Suite) and then select OK.
In Nokia Suite, click Tools then Backup. Nokia Suite shows you a list of the content types that you can back up and prepares a list of information that can be backed up.
Select the information that you want to back up. If you want to change where the backup file is saved, click Browse and choose another location. If you have a lot of music, photos or videos on your phone, including them in the backup will cause the backup process to be slower.
Click Start to begin backing up. Do not disconnect or switch off your phone during the backup. If you need to stop the backup, click Stop. Nokia Suite will reach a safe stop point and will then stop the backup.
Click Finish to close the window after the backup is complete.
To update your phone software, you can follow the steps below:
In Nokia Suite, select Tools then Software updates. If an update is available for your phone, you can see it here along with any other updates that are available.
Click Install to start the installation. During the installation, Nokia Suite takes you through the following steps:
Back up (recommended)
Please do not disconnect your phone until the installation is completely finished. Doing so might cause damage to your phone or result in its contents being lost.
Otherwise, if you're not referring to the certificates, can you explain further your concern so we can provide you the correct solution? What authority files are you referring to?
Hope this helps.