As ever, I genuinely and eagerly await the response from @Moxie and others on here (whom have a huge amount more knowledge of encryption than I do) and their an

As ever, I genuinely and eagerly await the response from @Moxie and others on here (whom have a huge amount more knowledge of encryption than I do) and their analysis of this. My first response is...wouldn't touch Viber with a barge-poll. Not open source, a strong Israeli Defence connection at the board level etc etc etc