It's Michens' MOSSAD/not-MOSSAD question[1]. Any half-decent encryption will protect you from bulk collection and monitoring, but if you're targeted, you lose.
[1] http://research.microsoft.com/en-us/people/mickens/thisworld...
[1] http://research.microsoft.com/en-us/people/mickens/thisworld...
https://www.usenix.org/system/files/1309_14-17_mickens.pdf
i don't know how he gets paid to write these. perhaps as class clown for the fine folks at microsoft research? in any case, very amusing.
http://research.microsoft.com/en-us/people/mickens/
He just also has a sense of humor, and makes time to exercise it.