Very cool project! Would make a great bitcoiner Christmas present!

“Nostr Key Backups

The machine is general purpose enough to engrave anything within the physical constraints of the plate. Backing up your Nostr private keys (NSEC) on steel with scannable QR representations allows a stateless device such as a SeedSigner to securely sign Nostr events.” nostr:note1pgml9jw5rmpsnjn8u3kxnxhdaf3rwky8p4hnn052stffzphrra7qurueg3

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Discussion

No chance I'm putting my seed in a machines memory. Thank you, good old punch kit is worth X10 less and is X10 more reliable.

Isn’t it the same issue for a SeedSigner, or any signer?

The seedhammer runs code from a seedsigner, you load the seed into ram (volatile memory where power is required), after removal of the storage medium.

Upon the removal of power, ram loses all all electrical charge (typically within microseconds)

The only potential risks are ram dumps from compromised software, cold boots or forensic tools which require immediate access to the device.