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>So Nyaira decided to share the photos with him on Messenger (Facebook's private chat tool).

>That was a big mistake. Almost instantly, Facebook's computer software deactivated her.

I thought Facebook was using the Signal protocol from Open Whisper for Messenger, so that even Facebook cannot access the content.

Are pictures/attachment in clear? Or was it the previous version? What's the situation today?

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E2E encrypted chats aren't by default. But they did achieve what they planned - you thought they were because you saw it mentioned sometime somewhere, but didn't look into the fine details. When reading headlines, a person might memorize "facebook encrypted chats available", but the devil is always in the details.

Thanks

The sibling comment is correct that e2e encrypted messages are not the default, but they likely weren't available at all in this case. They started rolling it out in July 2016[0], but that case started in June 2016.

[0] https://newsroom.fb.com/news/2016/07/messenger-starts-testin...

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