Millions of devices, including Android, Windows and iPhone phones, are just a few days away from completely losing Internet access.

A security expert has warned that the upcoming change, which begins Thursday, September 30, could have major repercussions on a wide range of devices made by leading household names, and could potentially be the reason for the Internet blockade, according to the HTTPS security protocol, RT.

Did you know that HTTPS (also known as Hypertext Transfer Protocol Secure) is HTTPS?

When you visit a website in browsers like Chrome, you may notice a lock icon in the address bar.

This means that the website uses HTTPS, which means that the site is secure and any information you enter is protected, so why is this important for Android, iPhone and Windows users?

On Thursday, September 30, the root certificate – which is used to encrypt communications between devices and the web and is required for HTTPS – expires.

After this date, devices and web browsers will no longer trust certain certificates called IDentTrust DST Root CA X3.

For most devices, this will not cause problems, but for older devices that have not been updated for many years (and do not have the right to use the new certificate), you may lose access to the Internet.

According to Scott Helmin’s blog post, security researcher is betting next Thursday that “some things are going wrong”.

In an online article, Helm said, “This is not the first time that the root CA certificate has expired, and I imagine it will follow an earlier expiration course, where things will break down, and if your certificate has a root certificate expired, you have a good chance of failing things. “

The affected root certificates were issued by the non-profit Lets Encrypt, which has issued more than two billion certificates – a large part of the web.

For iPhone users, you need to make sure you are not running an update lower than iOS 10, and for Android smartphone users, make sure you are not running version 7.1.1 of the Google software.

Windows users need to make sure you are running nothing less than Windows XP SP3, and if you have a Mac, you should make sure you are not running anything less than 10.12.1.

“There are a few other sites that need further investigation to see if they fail after the Identrust DST Root CA X3 expires,” Helm said.

It includes Amazon Kindle e-readers with patch less than 3.4.1 and PS4 game console with less than 5.00 firmware.

Here is the complete list of affected software versions:

– OpenSSL <= 1.0.2.

– Windows

– Magos <10.12.1.

– iOS <10 (iPhone 5 is the lowest model to access iOS 10).

– “Android” <7.1.1.

– Mozilla Firefox <50.

Ubuntu <16.04.

– دبيان <8.

– Java 8 <8u141.

Java 7 <7u151.

– NSS <3.26.

Amazon FireOS (Silk Browser).