By wrapping the Nostr key in the FIDO2 protocol, a.k.a. "Passkey," you can handle your account in a common and well-known way.

Demo video: https://youtu.be/iK-UCSVdw7s

For example

• Account registration by email
• Recovery by e-mail in case of password loss

These can be achieved by

• Extend NIP-42 for Passkey authentication
• Storing encrypted secret keys to the server etc.

Not completely trust a server, unlike simply delegating secret keys.