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You cannot reproducibly build signal, what you get in the play store is effectively closed.
by krageon 6y ago
You cannot reproducibly build signal, what you get in the play store is effectively closed.
- tialaramex 6y agoYou can build the core code, reproducibly. As I understand it if you take this code, and the binary blobs of the code that does stuff like video calls, you can verify that's what is inside your Play Store APK. Now, if you're a tinfoil hat wearer obviously you can consider that maybe the video call code secretly reads your messages and sends them to the FBI, or indeed that the Android OS just ignores this APK and when you install it you get something else entirely anyway. But it sure looks like the source code is in fact for the app you get.
- dane-pgp 6y agoIt would be nice if Android let you check the hash of the APK against a Binary Transparency log hosted by a third party. Google have even written extensively about this idea: https://transparency.dev/application/add-tamper-checking-to-a-package-manager/ https://transparency.dev/application/add-tamper-checking-to-...
- psanford 6y agoAndroid does verify that any new versions of an APK are signed with the same signing key as previously installed versions. So you would have to compromise the signing key held by the developer in order to push an evil APK.
- gruez 6y agoSource? This page says otherwise: https://github.com/signalapp/Signal-Android/tree/master/reproducible-builds https://github.com/signalapp/Signal-Android/tree/master/repr...
- deleted 6y ago[deleted]