alt Hacker NewsNever rely on a platform used by the masses to perform E2EE. It is far too easy to strip away E2EE for targeted users without their knowledge as they maintain the server and client code. This advise is to protect from corporations gobbling up and ultimately leaking sensitive data. Spooks can target the device itself via debug access for nation state level threats.
Consider instead using a code word or phrase to move sensitive conversations to something self hosted such as jabber using OMEMO XEP-0384 and XEP-0373 OpenPGP for XMPP and SASL SCRAM. OMEMO is an implementation of the Signal protocol on top of the XMPP protocol.
e.g. "_Expletive_! I stubbed my toe!" other-person: "lol geezer watch where you are walking." conversation quietly and temporarily moves to the pre-shared self-hosted Jabber server. Temporarily because going dark can draw attention. Feed the big chat platform boring garbage and misdirection.
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Unless you're actually a spy, there's no reason to do this. Just use your secure solution all the time with those conversation partners who are willing to use it.
People catch the spooks and their exploits all the time though.
It is possible to defend against them. Maybe not on your phone though.