So, I have a half working prototype of an improved keyboard wedge. So far I can pull a passphrase from a random location on a mifare 1k.
Tomorrow I will start work on the USB keyboard output portion.
This is an RC522 RFID reader attached to an adafruit trinket m0. The trinket is mounted on a small breadboard for ease of use and the white wire is not actually in use it was just plugged in up there to keep it out of the way.
Total parts cost about $15. I was originally going to use a digispark but it wasn’t much cheaper and had a much less capable chip on it.
I will document it more thoroughly once I have the keyboard part working.