If your device runs an earlier Android version, the Lollipop upgrade offers to enable encryption during the upgrade. Otherwise, you must manually enable it after the upgrade.

Android's Messages app now has end-to-end encryption. Make sure you enable it. You can still be exposed for posting filth in the group chat, though.

WhatsApp has implemented end-to-end encryption for Android backups, marking a significant enhancement to the security of users’ chat backups stored outside the messaging application. The feature, ...

Add a layer of privacy and security to messages in Android by using end-to-end encryption, a feature that is now out of beta.

How to enable End-to-end Encryption (E2EE) on Ring Video Doorbells & cameras To get started, you’ll want to open up the Ring app, and make sure you are on the latest version.