I wanted to know if something exists that would allow the following.
Whenever I use my RSA key(when using ssh for example) I'm prompted for my passphrase. I would like to, instead of being prompted for it, if a "USB-Key" is plugged in, it would use it instead of the passphrase.
But if the USB is not plugged in, then would have a fallback to the passphrase prompt.
If there is a solution to this could someone point it to me? Or at least give me some keywords/links for me too refine my search for it?