The Ultimate Defense: What Is an Air Gapped Computer? – How-To Geek

The Ultimate Defense: What Is an Air Gapped Computer? – How-To Geek


Physically cutting an Ethernet cable to a laptop.
a_v_d/Shutterstock.com

When reading about cyber-security, you’ll probably see talk about “air-gapped” computer systems. It’s a technical name for a simple concept: A computer system that’s physically isolated from potentially dangerous networks. Or, in simpler terms, using a computer offline.

What Is an Air-Gapped Computer?

An air-gapped computer system has no physical (or wireless) connection to unsecured systems and networks.

For example, let’s say you want to work on sensitive financial and business documents without any risk of ransomware, keyloggers, and other malware. You decide that you’ll just set up an offline computer in your office and not connect it to the internet or any network.

Congratulations: You’ve just re-invented the concept of air-gapping a computer, even if you’ve never heard of this term.

The term “air gapping” refers to the idea that there is a gap of air between the computer and other networks. It isn’t connected to them and it can’t be attacked over the network. An attacker would have to “cross the air gap” and physically sit down in front of the computer to compromise it, as there’s no way to access it electronically over a network.

When and Why People Air Gap Computers

An electrical engineer in front of computers in the control room of a thermal power plant.
Suwin/Shutterstock.com

Not every computer or
Source…

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