Given the recent detainment of a French person who got detained because he said something bad about the current administration in his WhatsApp messages. It makes me wonder if WhatsApp is truly end to end encrypted as they claimed. How did they even single him out?

As a corollary question, if I were to pass Customs, and if I delete WhatsApp , Reddit etc just before I reach the counter, will they be able to find out that I just deleted the apps minutes ago? I’ll be deleting them from my phone but keep them on the cloud.

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[–] Telorand@reddthat.com 3 points 6 days ago

If the encryption is ever hacked, knowing who you are is probably the least of anyone's concerns. I would imagine that any adversary could build a profile or plan a response without knowing a particular phone number.

"These two people are planning civil rights activism here on Friday," is just as useful as, "MLK Jr and Malcolm X are planning activism here on Friday."

Thankfully, they'd have to not only break encryption but also MitM the conversations, since Signal doesn't actually store chat data on their servers.