Google has rolled out end-to-end encryption for Gmail to enterprise users on Android and iOS devices, expanding on last year's desktop implementation. The feature uses client-side encryption, allowing organizations to control their own encryption keys while users can now read and compose encrypted messages directly within the mobile Gmail app. It's currently available for Google Workspace Enterprise Plus customers with specific add-ons, and administrators need to enable it through the admin console before users can activate it by selecting additional encryption from the lock icon.