This has been my challenge and the reason why I wanted to keep the key login as an option.
Discussion
What about creating an identity wallet where you maintain a keyring of all your past keys?
Like a nostr password keeper? 🤔
Yeah maybe, you could make it seemless so they don't have to see all the keys. But just have it just give notifications and when they reply,ithe keeper uses the original key used in the post
You would want a button to let them see all the keys so that they could confirm on their own that their privacy is still maintained