A recent announcement from a certificate-authorizing organization, Let’s Encrypt, states that around 30% of the websites will stop working on many older Android devices starting from 2021. This will be a result of the termination of Let’s Encrypt’s partnership with another cert-authorizing organization called Identrust.
“Some software that hasn’t been updated since 2016 (approximately when our root was accepted to many root programs) still doesn’t trust our root certificate, ISRG Root X1. Most notably, this includes versions of Android prior to 7.1.1. That means those older versions of Android will no longer trust certificates issued by Let’s Encrypt.”, read the official announcement.
