I wonder by "end-to-end" do they mean they will be implementing Signal Protocol, that would be a pretty awesome increase in security (for most peoples threat models)...WhisperSystems are genuinely amazing at what they do, they have like less than 5 staff and very little budget but they are literally saving hundreds if not thousands of lives. Any chance some rich HN member will recognise this and open up the chequebook to OWS?