Tor was built by the US. Navy, but since it's been known for a few years now that tor is attack-able on a number of fronts, and since a bunch of NSA tools were just leaked I'm not surprised they are working with blockchain encryption now. However they obviously are going to take the time to do this right, with probably multiple different encryption algorithms and conversions to further obfuscate things, since while it hasn't been 100% proven, it is theoretically possible, and a pool of people have already started trying to brute force puzzle btc wallets. (look up large bitcoin collider) Now, imagine your a nation state, and everyone is spying on each other, if any large nation state wanted to attack the major blockchain projects they could, just think about all the NSA server farms THAT WE KNOW of. This looks promising, I wonder what it will end up being used for, maybe we will never know, maybe our grand kids might under a FOIA request. In blockchain we trust!