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Air-Gapped Networks (Part 3): Cross-Domain Solutions and Off-Site Backups (Download)

July 20, 2023

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In Part 1 of this three-part series, we introduced the concept of “air-gap networks”—secure  computer networks that are physically isolated (“air-gapped”) from their unsecured counterparts.

In Part 2, we considered the problems associated with physically moving information from one air-gapped network to another. As part of this, we noted that the removable, encrypted drive is a fundamental building block to solve information transport issues created by maintaining isolated systems with no common networks.

In this third and final article, we delve a little deeper into the issues associated with trying to implement cross-domain solutions. Also, irrespective of whether information is on an accessible network or air-gapped to keep it isolated, it still needs to be backed up. Thus, we will also delve into the secure procedures required to conduct such backups.


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