Their comms are what they are.Their every comm is monitored "almost" in real time. They are stuck with their own code as"almost"any change is monitored as well. The exception being a secure skiff...not so easy any more...or a good old fashion note. In either case any code change will be noted very quickly. The brilliance of Trump/Q code is that it is actually the DS code. This understanding unravels much (half) of the mystery of it's seeming complexity particularly regarding time/time stamps. MI is pretty damn good at code and code breaking.  It's no longer an enigma. Comey and DS are stuck with "T"unny...sats down.