Apple has blocked on iOS and iPadOS a set of eight compromised security certificates that were found to be astoundingly weak. It’s a bit more complicated on Mac.

Apple and others have to deal with many online threats, both severe and idiotic.

Apple and others have to deal with many online threats, both severe and idiotic.
Security certificates (SSL/TLS) are used to keep Internet users secure, thanks to using encryption to secure traffic and to verify domain ownership. However, a collection of certificates from one authority has been pulled from use after security researchers found them to be extremely weak.
As a result, Indian certificate authority eMudhra revoked the certificates. This prevents the certificates from being used by websites, closing the barn door after their discovery and disclosure on October 17.