The math for systems like this is pretty well vetted; considering that DHTs have been used in a number of projects for over a decade, any flaw that the NSA know

The math for systems like this is pretty well vetted; considering that DHTs have been used in a number of projects for over a decade, any flaw that the NSA knows about almost certainly would have spilled out into the rest of the world by now. There are theoretical attacks against portions of this -- the 51% attack against the bittorrent protocol for signing IDs -- but in practice, they'd be very very difficult to actually pull off. Yes, a "few people" implemented it, but it's all pieces that have been vetted elsewhere.