If you rely on a single secure (for certain values of the word 'secure') messaging system or protocol you're absolutely insane. You'd want to be splitting your

If you rely on a single secure (for certain values of the word 'secure') messaging system or protocol you're absolutely insane. You'd want to be splitting your communication across multiple communication sources, with none of them ever seeing enough data to compromise whatever it is you're worried about. Deep and computationally expensive is great; deep, computationally expensive and broad is better. If one form (e.g. Telegraph) falls they've not got the full message, and they've still got a lot more work to do to get the whole thing.