https://techcrunch.com/2018/07/25/google-cloud-introduces-shielded-vms-for-additional-security/

While we might like to think all of our applications are equal in our eyes, in reality some are more important than others and require an additional level of security. To meet those requirements, Google introduced shielded virtual machines at Google Next today.

As Google describes it, “Shielded VMs leverage advanced platform security capabilities to help ensure your VMs have not been tampered with. With Shielded VMs, you can monitor and react to any changes in the VM baseline as well as its current runtime state.”