TrunkMonkey
Spy Navy
Can't they just restrict/block the use of thumbdrives and other devices on SIPR computers?
The Army network we used in Afghanistan did this - disabled the USB ports on all SIPR computers. We needed them for legitimate operational reasons, went through the Army's "thumbdrive training" and appeal process 3x, never got access, and eventually discovered a software work-around.
The real problem, in my mind, is people who think it is OK to "cross the streams" with memory media, or the people who leave SIPR thumbdrives in their uniform pockets when they go to the laundry, and they turn up the next day at the bazaar.