npub1lv…20ep2 on Nostr: I was just thinking on a concept taken from 2FA sort of thing. When we use Authy or ...

I was just thinking on a concept taken from 2FA sort of thing. When we use Authy or any other authenticator, the ongoing 30 seconds codes are created from an initial key (usually the platform QR code connected to our account).
Can this be a solution for what we are looking for? The idea is the first use of our key in a Nostr platform, can create timed ongoing keys, that we could use to login/access.
What I don't know, is how to implement something similar into the platform.
Just a "daft" idea.