this post was submitted on 27 Jan 2026
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Well, no. At least not by default as you are running a compiled version of it. Someone could inject code you don't know anything about before compilation that for example leaked your keys.
One way to be more confident no one has, would be to have predictable builds that you can recreate and then compare the file fingerprints. But I do not think that is possible, at least on android, as google holds they signature keys to apps.
Signal is also on F-Droid, so it should be verifiable
Signal has reproducible builds and here's the instruction how to check it on Android https://github.com/signalapp/Signal-Android/blob/main/reproducible-builds/README.md