This feature is available as an open beta, which means you can use it without enrolling in a specific beta program. While this feature is available for Google Docs initially, with support coming for Google Sheets and Slides in the future.

Additional details
Note that when sharing encrypted files, you can only assign “viewer” or “editor” permissions — the “comment only” permission is not supported.
Comments are saved each time the document is autosaved. If you restore the document to a previous version, the comments added to the document in that version are also restored.
Getting started
- Admins: Client-side encryption can be enabled at the domain, OU, and Group levels (Admin console > Security > Access and data control > Client-side encryption). Visit our Help Center to learn more about client-side encryption.
- End users: If client-side encryption is enabled by your admin, use our Help Center to learn more about working with encrypted files in Drive, Docs, Sheets & Slides.
Rollout pace
- Rapid Release domains: Gradual rollout (up to 15 days for feature visibility) starting on January 16, 2024
- Scheduled Release domains: Gradual rollout (up to 15 days for feature visibility) starting on February 1, 2024
Availability
- Available to Google Workspace Enterprise Plus, Education Standard and Education Plus customers