This would be pretty easy to test. Just get a bunch of friends to start exchanging encrypted messages about bombing an embassy or govt office. If these douche-bags can break it, they'd be on you like white on rice.
can anyone think of a lower risk way to test...?
no body going to take this risk even its end of a life
send the NSA a letter and see if they answer your question
ooh I like the way you think. Direct and to the point!