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how to enable E2E on Google messages app
To try out E22EE right now, you’ll need to enroll in the Google Messages beta program on Android
(Otherwise, hang tight, as the feature will roll out to everybody in an upcoming update for the stable version of the app)
From there, you’ll need to turn on Chat features in Messages:
Tap the three-dot button in the upper-right, then tap “Settings.”
Select “Chat features.”
Toggle “Enable chat features” on
All other conversations—including group chats—will be left unencrypted. It’s theoretically possible that group-chat encryption could show up in a future Messages update, but Google hasn’t indicated such a feature is on the way.
Encrypted conversations display a padlock icon next to the “delivered” tag under the most recently-sent message, and also on the “Send” button.
Note that Google Message’s E2EE only kicks in when both members in a conversation are using the latest version of the app on devices and mobile networks that support RCS messaging (most do).