Since 2010 there are a set of SharePoint Deployed Certificates for SharePoint Security Token Service, SharePoint Security Token Service Encryption, and SharePoint Services. When a Farm is Created, the SharePoint Root Authority is not set to be trusted. When a farm is created or when a server is joined into a farm the SharePoint Root Authority could be added in as trusted to potentially mitigate slowness that may be experience per this KB:https://support.microsoft.com/en-us/help/2625048/site-slowness-because-of-sharepoint-sts-certificate-crl-checking