A few months after WhatsApp started encrypting all conversations by default, and a few weeks after Facebook announced encryption was coming to Messenger too, Facebook has turned on the security feature, with 'Secret Conversations' available to beta testers of the app.

Secret Conversations do have a few caveats users should probably be aware of. They are not turned on by default, and neither is end-to-end encryption. A normal Messenger conversation can be made secret by a toggle - more on that in a minute - and these conversations will be encrypted.

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