Old versions of Android will stop working with Let's Encrypt certificates

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Active member
Oct 25, 2020
Wow, Android 7 is quite recent. Especially with the fact that this specific version of Android changed the way it handles certificates from the user trust store.

Funny enough, Android 6 and older would still be able to manually install LetsEncrypt's root CA with a few technical instructions, but Android 7 itself denies applications access to user installed certificates unless the app requests some specific permissions. Going around that requires root access, and that pretty much renders the entire trust store of CAs a moot point.