Honestly, a fixed trusted keyset with a jumper you can use to switch to a programmable keyset. Ideally with a jumper to set that in programmable or read-only mo

Honestly, a fixed trusted keyset with a jumper you can use to switch to a programmable keyset. Ideally with a jumper to set that in programmable or read-only mode. That makes it extremely obvious when something wants to mess with it, without actually preventing you if that's actually what you want.