None of this has anything to do with Signal itself, which is as secure as it gets.

Didn’t I say that at the start of my questions? What’s your point?

server would catch and reject it if it’s fingerprints don’t match the previously known good copy, or a public version

If I understand you correctly, you mean that Signal app checks itself and sends the result to the server that can then deny access to it? Is that what Signal does and what makes it difficult to spoof this fingerprint?

I don’t think you answered any of my questions though since they weren’t about Signal.

Now you’re just coming up with weird things to justify the paranoia

I’m just asking questions about security I don’t know answers to, I’m not stating that’s how things are.