Observation: If a Certificate Authority (CA) is down or unreachable over the Internet for whatever reason -- then effectively all transactions which require that CA to work are down as well...
If all CA's are simultaneously down or unreachable -- then effectively any protocol that requires a CA -- is also down...
This includes SSL, TLS, and everything which requires HTTPS to work -- not just all HTTPS web pages -- but all HTTPS web services as well...
If all CA's are simultaneously down or unreachable -- then effectively any protocol that requires a CA -- is also down...
This includes SSL, TLS, and everything which requires HTTPS to work -- not just all HTTPS web pages -- but all HTTPS web services as well...
A "single point vulnerability" indeed!