Identrust DST Root CA X3 expire September 30

Identrust DST Root CA X3

Since 30 September, millions of computers, smartphones and even game consoles have been disconnected from the internet. This is because a high-level security certificate has expired, the "Identrust DST Root CA X3" certificate. This is an electronic document that enables website authentication. This certificate is used when an internet user starts the browser. It checks the reliability of the site you are surfing to. The data is encrypted and the content of the websites you visit is protected by encryption with public and private keys. The first can be shared with anyone.

Actuary Corinne Hénin, a cyber security expert explains. “Anyone with access to your public key can use it to send you encrypted data. Only you can decrypt it because you have the private key.”

Source: Bouwend Nederland Ledenmagazine


As of this date, this “IdenTrust DST Root CA X3” has expired. However, this certification plays the role of a trusted authority for signing and encrypting most websites. The latter is a certification body launched in 2015 that has made web encryption widely available, particularly finding HTTPS connections. Because this certificate has now expired, other certificates now have no trusted authority to check the reliability of your connection. As a result, the connection is no longer made.


This only affects older models of smartphones, computers and game consoles whose manufacturers no longer provide updates. The company Let's Encrypt has even issued a new “ISRG Root X1” certificate, but it only works on newer devices.

  • The versions below, and anything older, are affected:
  • Windows XP Service Pack 3
  • MacOS 10.12.1r
  • iOS 10
  • Android 7.1.1
  • Mozilla Firefox 50


If the Driver App or Planner App is installed on an Android device with a version older than 7.1.1. or iPhone with iOS 10 or lower, this application will no longer be able to make a secure connection with our servers.

Windows XP is also part of the list. This operating system of Microsoft is no longer supported by Microsoft itself. When this operating system is still in use, communication with our Studio 3 application is no longer possible. These computers require replacement or an upgrade to Windows 10.

Is Studio 2 still in use?

This version is no longer supported, and has been replaced by Studio 3. The upgrade can be found on the support page.


To still be able to use the apps on Android version 7.1.1. or lower, we have made a temporary change whereby the secure connection is replaced with a standard connection without encryption of data. As a result, the apps remain usable with older versions of Android at this time but we recommend upgrading systems for the best and safest experience.