iOS 18.1.1 Trust Store Version (Certificate Trust Settings)

In simple terms, The Trust Store contains the digital signatures of issuers of the SSL certificates that are used to encrypt access to websites and email servers. There are billions of SSL certificates in use around the world. They are issued by a relatively small number of agencies and companies (called Certificate Authorities, or CAs), who, as part of the process of issuing the certificate, verifies that the site is legitimate. When you visit a website the certificate from that site is sent to your browser. Your browser then verifies that the certificate was issued by one of the agencies whose signature is in the Trust Store. If the signature is not in the trust store you see a warning that the site may not be what it seems. The Trust Store is updated as part of an iOS update. It will change whenever the list of certificate authorities changes, which is very rare. The Trust Store version is actually the date and time the trust store contents were last updated. So, for example, version 2024051501 was last updated on May 15, 2024 at 1 AM.

The trust store version has absolutely nothing to do with security vulnerabilities. If you keep your Apple product updated to the latest version of MacOS or iOS it will be protected against all known vulnerabilities, despite whatever mis-information has been posted in the forum. 

iOS 18.1.1 iPhone 12 Pro has this Trust Store and Asset version see the pic below

Understand older Trust and Seet versions.

If you are referring to this article where they are referring to iOS 16 --> List of available trusted root certificates in iOS 16, iPadOS 16, macOS 13, tvOS 16, and watchOS 9 - Apple Support (IN)

Here is the pic of latest Trust Asset Versions

iOS 16, 16.3, 16.5/16.6 have different Store Versions and Asset Versions. Please go through my entire post

iPhone 12 Pro and 8 (iOS 16.6.1)

For iOS 15.7.8 and iOS 16.6 refer to the pic below (Date Based)

For iOS 15.7.8 and iOS 16.6 refer to the pic below

This is the correct trust store version for iOS 16.5 - 2023032800. Please see the pic below on iOS 16.5 iPhone 12 Pro.

Learn about Available trusted root certificates for Apple operating systems - Apple Support

This is part of iOS updates which can be clearly seen below

All my devices, iPhone 8 (iOS 16.0), iPhone 12 Pro (iOS 16.1.1) & iPhone 13 Pro on iOS 16.1.1 also iPad Pro on iPadOS 16.1 are with Trust Store Version: 2022070700 and Trust Asset Version 18

iPhone SE (1st Gen) iOS 15.7 2022031500 and Trust Asset Version 18

Earlier, iPhone 8, SE (1st Gen), iPhone 12 Pro & iPhone 13 Pro on iOS 15.6.1 also iPad Pro on iPadOS 15.6.1 all are with Trust Store Version: 2022031500 and Trust Asset Version 17

iPhone 6 iOS 12.5.5 Trust Store Version 2018121000, Does not have Trust Asset Version

After updating my iPhone 6 to iOS 12.5.6 it still has Trust Store Version 2018121000, Does not have Trust Asset Version

There is an old discussion thread on Trust Asset Versions that may help you understand --> Trust asset version 11. - Apple Community

Please check the iOS versions on each device again

Learn about Available trusted root certificates for Apple operating systems - Apple Support

This is part of iOS updates which can be clearly seen below

iPhone 12 Pro iOS 16.3 Trust Store Version: 2022070700 and Trust Asset Version 20

iPhone 8 iOS 16.2 Trust Store Version: 2022070700 and Trust Asset Version 20

iPad Pro 9.7" iOS 16.2 Trust Store Version: 2022070700 and Trust Asset Version 20

iPhone 13 Pro iOS 16.2 Trust Store Version: 2022070700 and Trust Asset Version 20

I may have missed Asset Version 19

All my devices, iPhone 8 (iOS 16.0), iPhone 12 Pro (iOS 16.1.1) & iPhone 13 Pro on iOS 16.1.1 also iPad Pro on iPadOS 16.1 are with Trust Store Version: 2022070700 and Trust Asset Version 18

iPhone SE (1st Gen) iOS 15.7 2022031500 and Trust Asset Version 18

Earlier, iPhone 8, SE (1st Gen), iPhone 12 Pro & iPhone 13 Pro on iOS 15.6.1 also iPad Pro on iPadOS 15.6.1 all are with Trust Store Version: 2022031500 and Trust Asset Version 17

iPhone 6 iOS 12.5.5 Trust Store Version 2018121000, Does not have Trust Asset Version

After updated my iPhone 6 to iOS 12.5.6 it still has Trust Store Version 2018121000, Does not have Trust Asset Version

There is an old discussion thread on Trust Asset Versions that may help you understand --> Trust asset version 11. - Apple Community