Certificate Authority Google commonly uses TLS (previously known as SSL) to secure communications between Google services and our users. As part of TLS, a server is required to provide proof of its identity in the form of a certificate that's signed by a CA. Google has long used certificates ultimately issued by the CA “GeoTrust.” In the coming months, Google will begin using the GlobalSign R2 CA (“GS Root R2”). As it's a well-established Continue Reading