[gherkin0]

> Something like a smartcard, with an eInk display and membrane keypad, that lets you select a credential and then provide it to the application via keyboard injection, or where possible over using challenge-response over the existing smartcard interface so the secret never leaves the card.

You might be interested in this:

https://hackaday.io/project/86-mooltipass

[shabble]

Interesting. I had seen that a while back I think, but totally forgot when writing my comment just now. It's not quite 100% what I was thinking, but it's closer than anything else.