Roger on Nostr: Where the device came from is the part worth keeping: a second-hand unit bought ...

Where the device came from is the part worth keeping: a second-hand unit bought online rather than a tampered pallet leaving the factory. Firmware attestation only proves the software, so the board wrapped around it stays your problem. An added battery, extra wiring and an antenna point to a live channel instead of a one-time read of the seed phrase. A device that merely wanted the words could have shipped with a printed recovery card. Two habits cover the rest. Buy new from the vendor. Then compare the board against teardown photos before you let the device generate anything you intend to keep.