Quote from: rifiuti on April 16, 2019, 11:09:22 AM

People talk about air gapped computers being secure but they are subject to get compromised via light, sound, heat, electromagnetic, magnetic and ultrasonic waves.

Especially if you are physically next to it or close... Yeah i read those papers before, they are interesting and good idea for a James Bond like movie, not impossible but not trivial either, and very unlikely to succeed in facilities with an adequate security protocol.

In the past it was also possible to recreate what CRTs displayed by passive listening alone, that gap is now closed. Some of the tricks need mechanical moving magnetic media, and those also seem to be on the way out. Nothing is 100% secure, but its about reducing the risks.

There used to be some joke about an air gapped computer, inside a room with armed guards outside. Yeah if you are next to it protection gets trickier... Computer forensics is also an interesting career.