Comment by 0cf8612b2e1e
19 days ago
A real innovation from the Bitcoin world! There are several physical password store systems that they have suggested for this kind of use case. The simplest is basically using a nail to punch out a password onto a piece of sheet metal.
Articles such as https://blog.lopp.net/metal-bitcoin-seed-storage-stress-test... will help you pick among the various seed stores out there.
And so we return to our programming-roots with punchcards. :p
Additionally hardware wallets which can use a seed to generate huge variety of keys.
Including AGE keys (so you can encrypt arbitrary data), SSH keys, FIDO2 and passkeys.
Additionally you might want to store a hardware wallet in a deposit box instead of the seed (if you trust the security model).
Just make sure that the metal you use has a high enough melting point.
Do people usually find big pools of metal on the ground in burned houses, or is everyday metal fine?
Especially inside a fireproof safe.
Wouldn't trust aluminium, solder, Wood's metal, gallium, or mercury, but apart from that...
Maybe a clay tablet (assuming it's safe from water)?
Tungsten, perhaps.