"...the reason this guy didn't get into any classified information is because the military doesn't store classified information on the NIPRNet, that is, Unclassified but sensitive Internet Protocol Router Network. This NIPRNet is the Internet that DARPA originally developed and that everyone here uses today. Classified information is transmitted only along a SIPRNet, or Secret Internet Protocol Router Network, which is not actually connected to the public Internet.Releasing or altering classified information would almost certainly require physical access to one of the computers that's already linked to the military SIPRNet. If the rest of the computers across the military are protected in similar fashion to the ones where I work--behind a foot-thick wall of steel with armed guards stationed at the entrances--I feel pretty good about the security of our classified information networks."