I've never heard the military say that wired is secure. It is in fact printed on every telephone on a military base that it is subject to be monitored and they don't mean only by them. Every briefing I took when getting a security clearance said the same thing.
On a tempest rated computer everything is shielded or filtered. The power had a large filter section for the AC before it's fed to the supply. The vents used honeycomb shields. If data had to be sent from the computer to somewhere else it either got hand carried on a disk or the computer was hooked by shielded cable to an encryption device that would encrypt it and send it safely on it's way.
The cases have extra space for all the filters. Any part of it that opened to the outside had an RF gasket.
The concept of red/black is that red is unencrypted and had to be in a shielded and protected machine/area, black is encrypted and can go wherever you want.
no subject
On a tempest rated computer everything is shielded or filtered. The power had a large filter section for the AC before it's fed to the supply. The vents used honeycomb shields. If data had to be sent from the computer to somewhere else it either got hand carried on a disk or the computer was hooked by shielded cable to an encryption device that would encrypt it and send it safely on it's way.
The cases have extra space for all the filters. Any part of it that opened to the outside had an RF gasket.
The concept of red/black is that red is unencrypted and had to be in a shielded and protected machine/area, black is encrypted and can go wherever you want.