Thanks for the link to tresorit. Will check it out. I checked out WhisperSystems. Signal (their iOS app) needs access to Contacts to work. Why?! (1) Why should I trust them with my contacts that I'm NOT reaching through their App, (2) Smells the same like WhatsApp where it is only a matter of time, where they sell out and start selling my contacts for "correlation" value at least.

Cross posting this rant as a ask HN post.