This is a very good point. However, nothing can protect you against a NSA-level adversary. Signal is designed to protect you against Google or Facebook.https://twitter.com/RealSexyCyborg/status/1347455529241612294 …
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please allow me a little joke: you'll be more secure on anything not being a random Android phone. (not only because Android's many flaws, but also bad practices of phone manufacturers, carriers and users)
That kind of specialized hardware stops many attacks against Signal but not all because Signal itself has a big attack surface. Particularly it wouldn't have stopped things like this.https://twitter.com/ortegaalfredo/status/995017143002509313 …
I realized precursor can't run Android nor Signal. Well I guess that's a way to secure software. It's basically the OpenBSD approach, it works.
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