Reproducible builds help with 3) as well. There was just an announcement re that a few days ago: https://whispersystems.org/blog/reproducible-android/ https://w

Reproducible builds help with 3) as well. There was just an announcement re that a few days ago: https://whispersystems.org/blog/reproducible-android/ https://whispersystems.org/blog/reproducible-android/