That problem is, I think, a showstopper for "anti-circumvention" tools like whatever- the- next- generation- of - Tor will be. Dictatorships have little to lose by backdooring or rootkitting devices; they'll laugh off any outrage stirred up by the discovery of these methods.
Well until something like the DIY Cellphone gets more traction to deal with backdooring/rootkitting: https://webcache.googleusercontent.com/search?q=cache:http:/... (MIT Media Lab)