Hardware signing devices to hold your nsec, offline
Similar to a Bitcoin hardware wallet
Discussion
It would have no use, a private key for Nostr needs is exactly like a private key for a lightning node. It has to be online all the time in order to sign notes. Otherwise you just have a dead, unusable account.
What you could do is put the private key on a secure enclave inside of a hardware wallet, but it would still need to be connected to a device that is always online in order to be functional.
Then why are people building them? And how does Amber work?
https://shop.lnbits.com/product/nsec-remote-signer
https://shop.lnbits.com/product/nostr-signing-device
What nostr:nprofile1qqs99d9qw67th0wr5xh05de4s9k0wjvnkxudkgptq8yg83vtulad30gpp4mhxue69uhkummn9ekx7mqpz4mhxue69uhks6tnwshxummnw3ezumrpdejqz9rhwden5te0wfjkccte9ejxzmt4wvhxjmc3zhm7j is building (NFC card nsec remote signer)
