Air-gapping is a process where a computer is isolated from all external networks, including the internet. It is done by using either a physical or logical barrier. The reason is to prevent unauthorised access and/or cyberattacks. As a freelancer, I had one computer that was permanently offline for occasional high-stakes high confidentiality projects that used to come my way (for information about some of the precautions I used to take, check out this post). One customer even used to bring me physically into their premises for some jobs.
Air-gapping still remains very common practice in investigative journalism – as notably featured in Dan McCrum’s “Money Men” about the Wirecard scandal.
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