this guy is working on Anelok, a little passwords/keys/etc storage that has a little screen and few buttons:
http://downloads.qi-hardware.com/people/werner/anelok/tmp/mk3-running/on-acc...
mailing list for history of his work on it:
Photos: http://lists.en.qi-hardware.com/pipermail/discussion/2017-February/011048.ht...
latest post: http://lists.en.qi-hardware.com/pipermail/discussion/2017-May/011077.html