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Tangentially related: digital currencies like Bitcoin and Ethereum have spawned a burgeoning physical-document-security industry. If you don't want your private
by sowbug 5y ago
Tangentially related: digital currencies like Bitcoin and Ethereum have spawned a burgeoning physical-document-security industry. If you don't want your private key to leave the airgapped computer that created it, but you do want a backup, then you might manually etch, engrave, or stamp your key onto metal rectangles. Some companies are now providing kits to facilitate this tedious process. It's a little steampunk.
Even more tangentially related: if you've seen the Rick and Morty episode "Morty's Mind Blowers," do you know the name of the red container that Summer snapped open to reveal emergency recovery instructions? You also see them in old Atomic Age movies. I don't know if they've had any practical application in the last 20-30 years, but they are pretty cool and maybe useful for protecting the secrets mentioned above.
- etothepii 5y agoI've always been fascinated by this idea, since surely this introduces a number of other machines that have seen your private key. It is not unusual for the factory default settings on a printer to allow reprints of the last few documents, for example.
- aardvark179 5y agoI believe they are called sealed authenticators. They would provide part of a mechanism to prove a backup code had never been accessed, but I don’t know how you would ensure a code was not used and sealed into a new case.
- sowbug 5y agoThank you. That's the best lead I've gotten yet. https://www.keysure.net/ https://www.keysure.net/ is the closest to a real product, but everything else suggests that it's only a product of Hollywood imagination.