[deathanatos]

I once joked (I think because my employer had a similar, crazy requirement) that my keyboard's firmware was programmable, and I could just reprogram that FW so that Level3Shift+some key would rattle off the month's password.

Obviously, this is a terrible idea.

[michaelt]

Believe it or not, "Yubikey" security keys have about 8 different configurable modes. One of them is "emulate a USB keyboard and enter a static password".

So not only could you implement your idea - you could also tell people you "log in with a yubikey" and they'll think you're at the forefront of security.