There doesn't seem to be a mention of encryption anywhere. I'm surprised they didn't avail themselves of a little PGP. If a giant notorious terrorist organization isn't using public key cryptography, who is?
It's probably better for attempting to elude the NSA, as well. Get lost in the mix, as opposed to having big large red flags in your messages.
(Lots of people have died because of inadequate training in these areas. Eastern Flight 401 is a good example: http://en.wikipedia.org/wiki/Eastern_Air_Lines_Flight_401. The crew was so busy debugging a faulty light bulb that they forgot to fly the plane. It crashed into a swamp.)