"a custom high-entry password that's different from the user's local password?"
You mean an RSA private key? (no really, that's exactly what it is... you can put your private key in your password manager and copy it to your computer)
I can manually type in a 30-letter password that I can see from my password manager on my phone. I'm pretty sure I'm not going to be manually typing in an RSA private key stored on my phone.
You mean an RSA private key? (no really, that's exactly what it is... you can put your private key in your password manager and copy it to your computer)