No worries. Sufficient encryption, or encryption breaking, technology trends toward behavior as a weapon. As such, the military is highly, highly interested in mathematics generally, and cryptography specifically. There's a ton of really fun and riveting history there, if you're interested. For a long time, "encryption" to a certain degree was export controlled, but that's not really how it works today. The point is, you cannot have effective cyberweapons without extremely sophisticated ... math.
Oh, I mean, I'm fully aware of the emphasis on codebreaking and on areas like operations research that provide optimization tools for tacticians, not to mention the ITAR restrictions on crypto export.
(I was there when only 40-bit SSL was unrestricted! I very much remember those days! They sucked!)
I guess the hangup I have is that my forays into areas like differential geometry and algebraic topology are extremely abstract, and I cannot control anyone who isn't me who misuses those tools in decidedly not-sober ways. I can only make sure that I don't have a direct hand in that kind of misuse.
