5 ms·

I would agree with your assessment. If it's connected to _something_, then it's not air-gapped, right? I've never built an air-gapped system before but I imagin

I would agree with your assessment. If it's connected to _something_, then it's not air-gapped, right? I've never built an air-gapped system before but I imagine that I would want to start with a room lined with copper mesh and a big battery bank.

3pt14159 9y ago
Outside of a military context (and often even there too) air-gaps don't mean nearly as much as programmers think they do. There are too many possible ways in / out.
BillinghamJ 9y ago
Perhaps we should start going with vacuum gapping ;)
- williamscales 9y ago
  Yes! We have to rule out the acoustic factor entirely. Better put big graphite blocks around it too for good measure.
  - ClassyJacket 9y ago
    I'll take it a step further and suggest that highly secure applications should be causality gapped - the system is only activated when more than 5 billion light years from Earth, so no data could make it back before the sun destroys the planet. For critical applications, the system should be launched far enough from the edge of all observable matter, that it is causality gapped to the heat death of the universe.
    - Razengan 9y ago
      Your suggestions might be vulnerable to wormholes and other “shortcuts” across spacetime.
saltcured 9y ago
A pretty robust secure room even from many decades ago would combine isolation tricks you would see in various single-purpose laboratory settings and in hollywood movies. A room within a room with non-parallel walls for acoustic isolation over a wide frequency range. The inner room is hanging from a spring suspension system. A mesh layer for electromagnetic shielding. A power isolation system doing some elaborate AC-DC-AC conversion (mechanically and/or electrically). Also, separate air handling systems to avoid connected duct work. And of course, there could be significant buffering and filtering via mass loading, shock absorbers, capacitor banks, chilled water tanks, etc.

3pt14159 9y ago

Outside of a military context (and often even there too) air-gaps don't mean nearly as much as programmers think they do. There are too many possible ways in / out.

BillinghamJ 9y ago

Perhaps we should start going with vacuum gapping ;)

williamscales 9y ago
Yes! We have to rule out the acoustic factor entirely. Better put big graphite blocks around it too for good measure.
- ClassyJacket 9y ago
  I'll take it a step further and suggest that highly secure applications should be causality gapped - the system is only activated when more than 5 billion light years from Earth, so no data could make it back before the sun destroys the planet. For critical applications, the system should be launched far enough from the edge of all observable matter, that it is causality gapped to the heat death of the universe.
  - Razengan 9y ago
    Your suggestions might be vulnerable to wormholes and other “shortcuts” across spacetime.

saltcured 9y ago

A pretty robust secure room even from many decades ago would combine isolation tricks you would see in various single-purpose laboratory settings and in hollywood movies. A room within a room with non-parallel walls for acoustic isolation over a wide frequency range. The inner room is hanging from a spring suspension system. A mesh layer for electromagnetic shielding. A power isolation system doing some elaborate AC-DC-AC conversion (mechanically and/or electrically). Also, separate air handling systems to avoid connected duct work. And of course, there could be significant buffering and filtering via mass loading, shock absorbers, capacitor banks, chilled water tanks, etc.