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 and commonly trusted root CA, we expect minimal disruption to clients. However, for TLS clients that operate with custom root stores, we recommend that customers and application vendors ensure that their applications trust at least our minimum root set (PEM file)
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