@Avitus @Linux @delta Several examples over the last few years showed governments gaining access to Signal chats and interrupting illegal activities. How did they do it? Simple device seizure.

It doesn't matter how secure your chat app is or that it has the greatest key exchange algorithm and implements Perfect Forward Secrecy if you don't immediately delete the chat history off your device.

Literally nobody is being attacked by their government with a MITM. Instead, they're coming for your device which nobody properly secures but encryption enthusiasts always stay focused on the network protocols. Even TLS would be sufficient to stop them from snooping, every additional layer is just bragging rights IMO.