Minimal CA with Nitrokey
I’ve been using nitrokey’s for personal key management for several years. They can be a little big hard to use since there isn’t much in the way of documentation other than “go and use xca”. Which while is good advice, doesn’t address more advanced setups where the signing operation itself is the bit that matters.
I wanted to use purely command line tools with as minimal configuration as possible and does not use the hard disk so that signing operations may realistically happen from an ephemeral live booted device with no persistant storage.