So according to the BBC this morning (link below) the Yank government has been cooperating with our government and the makers and providers of online encryption services to ensure they ( the yanks) can access all current encryption systems either by attacking them with huge sodding great new super computers, and / or by manipulating the encryption systems many preppers currently use so they have a "back door" way of viewing your encrypted materials.
My point is rather simple its not as convenient or speedy but face to face RVs are still clearly far more secure than any online comms system be it digital or analogue. If you want to ensure privacy between yourself and who ever you want to exchange information with the best bet is still to print off the docs and hand em over at a rendezvous.
If you dont think of this as a major issue I can assure you large numbers of American preppers definately do as they have seen articles published by agencies the dept for HS that basically classify preppers as potential extremists.
Food for though but would'nt you be better off making the effort to attend SD or the other members RVs if you need to share info?
http://www.bbc.co.uk/news/world-us-canada-23981291