It would be cool to turn one into a private key safe. The Rasberry Pi interfaces your normal computer over USB, but only encrypts or signs files and does absolu

It would be cool to turn one into a private key safe. The Rasberry Pi interfaces your normal computer over USB, but only encrypts or signs files and does absolutely nothing else. So even if your computer is compromised the attacker still can't get your private key. This might exist already, but so far I've only seen smart USB drives that can be decrypted for a certain amount of time. Not the same thing.