^ The Nitrokey looks interesting.
What I would like to see is a (internal) solid state drive running free
software. Preferably, such a device would run only very simple software to
make auditing much more simple and to minimise the quantity of bugs in the
software. The device would need to be flashable only with hardware tools so
that malware wouldn't be able to arbitrarily upload malicious firmware (e.g.
the way in which BIOS firmware can be trivially compromised by anyone who
knows how and the same goes for all HDDs and SSDs on the market today). As
far as I know, such a device does not exist.
I would definitely use a Nitrokey as OS storage, if I trusted it and I could
just boot from USB that way. I am not sure if I trust it though just from
skimming over their website.