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> 1. Private messaging: Signal, WhatsApp, Cwtch

WhatsApp’s record over the last decade does not inspire confidence, and the issues raised this year alone are quite serious:

https://wikipedia.org/wiki/Reception_and_criticism_of_WhatsA...

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It still uses better encryption than Telegram, Threema, and several other products that market themselves as "private messaging" apps.

So don't use WhatsApp. That's a reasonable decision to make! I don't ever opt into it or recommend it to people (though I'd happily use it in preference to PGP email, which is doubtlessly the most risky secure messaging implementation on the Internet, arguably even more dangerous than simply using ordinary plaintext email with Google Mail).

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