An air gap or air wall is a network security measure

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How can I securely and conveniently move keys, certs and other short data across an air gap?

What options are available for transferring data between unix machines separated by an air gap? USB flash drives Optical media eg CDs and DVDs Printed paper and Scanning+OCR QR Code software, ...
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airgap a smartphone?

im looking to use my smartphone purely as a portable computer, with no network functionality in order to protect my privacy, is removing the sim cards from it enough to airgap it or do i need to go ...
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1answer
150 views

How safe are CD's for Air Gapped computers?

It is often suggested, for air-gapped PC's, to use CD/DVD's as a transfer medium between machines instead of USB sticks or portable hard-drives as it is difficult to write data to a CD/DVD without the ...