Facebook starts testing encrypted secret Messenger convos

The social network will make it more widely available this summer.

Facebook has begun rolling out an experimental Messenger feature for those who want their secrets protected by something more than the other parties' promise to keep it to themselves. If you're lucky enough to be chosen as one of the testers, you'll be able to start sending end-to-end encrypted "secret conversations" through the app. Any text you wrap with this extra layer of protection can only be accessed on one of the recipient's devices. So, even if your friend has two phones, a tablet and a computer, he can only see what you typed on one of them. According to Facebook's announcement post, not even the company can access your secret messages.

In addition, you can set a timer to indicate how much time your friend has to read what you wrote. Once time's up, it will disappear, much like Snaps. It's not perfect -- the recipient can still screencap your conversation -- but that goes for all ephemeral messaging apps. Since it can be a pain to deal with messages that can only be accessed on a single device, though, the feature is completely optional, confirming The Guardian's report of an opt-in encryption feature for Messenger back in May.

Unfortunately, secret messaging doesn't support rich content like GIFs or videos. But then again, we imagine you're much less protective of your meme collection than, say, your credit card or bank account details. The experimental feature uses a protocol developed by Open Whisper Systems, which Facebook also used for WhatsApp's encryption. It's the same technology Google is using for Allo's Incognito Mode and the same one that's powering Snowden's favorite messaging app Signal. While it's only available to a very small number of users at this point, the company promises to make secret messaging "more widely available this summer."