[oncallthrow]

> It can be on tape, or optical, or silicon, or paper.

You can pick up a hardware security module for a few thousand bucks. No excuse not to.

[xandrius]

I see a good excuse right there: the few thousand bucks.

I'd rather one the most reliable and cheap hardware security model we know of: paper.

Print a bunch of QR/datamatrix codes with your key. Keep one in a fireproof safe in your house, and another one elsewhere.

Total cost: ~$0.1 (+ the multipurpose safe, if needed)

[HeatrayEnjoyer]

Printers often have hard drives with cached pages

[okeuro49]

That's why you buy a printer, then destroy it with a baseball bat after you print.

It is a bit expensive when it gets to 5-10 printers but still cheaper than the thousands.

[xandrius]

Put the printer in the safe with the paper?

[alwa]

Yubico will sell you one for $650

https://www.yubico.com/store/