SHA-1

In a new support document, Apple has indicated that macOS Catalina and iOS 13 drop support for TLS certificates signed with the SHA-1 hash algorithm, which is now considered to be insecure. SHA-2 is now required at a minimum. Apple says all TLS server certificates must comply with these new security requirements in macOS Catalina and iOS 13:TLS server certificates and issuing CAs using RSA...