Maybe a remote signer is what you’re looking for?

The idea being that your business nsec would be only be on one phone or computer, then you would authorize it to sign events coming from other apps and devices.

The spec is nip-46: https://nips.nostr.com/46

Remote signers that come to mind would be:

(Android) Amber by @greenart7c3 : https://github.com/greenart7c3/Amber/releases

(Web) Nsec.app by @brugeman : https://nsec.app

(Server) nsecbunker by @PABLOF7z : https://nsecbunker.com 

 Thanks! Great info.  

 Remote signer, but also maybe check thread below. Will be adding that to nostr-login and nsec.app

nostr:nevent1qqstv6cl32tfwgtttz9v2sysfra85l9l35plc4zq25mvuf4a3u0h72qpremhxue69uhkummnw3ez6ur4vgh8wetvd3hhyer9wghxuet59upzqv6kmesm89j8jvww3vs5pv46hqm7pqgvpm63twlf9hszfqzqhz7aqvzqqqqqqy84amuq 

 I would like remote signers to have a QR code to sign air gapped logins to desktop applications. 

 they often do.  

 nak bunker works