password managers generate a unique password for each website. this means if one of your passwords leaks it won't compromise any of your other website logins.
nostr-login is a regression: if you leak your nsec then they have access to every website that you've ever logged in to.
using your npub for logging into everything is a really bad idea security wise, please be conscious of this before implementing or pushing this as a login solution to websites which may contain sensitive information.
We need deriviative keys.
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yes but how do you maintain identity???
Main npub could sign for valid derived keys and invalidated ones via an event?
Consistency is a big problem, events do not broadcast