One upcoming feature on modern computers is automatic face recognition login. Someone has made a system to do this (called howdy) for Linux (see: https://github.com/Boltgolt/howdy ). Basically its windows hello. From a technical perspective comparable librem’s would need IR camera’s (to do it in the dark) and an option at install to enable the system (plus and easy way to disable it.
Now I know this would be controversial but;
- the code is floss
- could be easily turned (either by kill switch or not clicking a box during install
- the face recognition is done locally without going out to a server