What a simple way to make a portable Raspberry Pi. When you say signing are you talking message encryption or Crypto transfers?
What a simple way to make a portable Raspberry Pi. When you say signing are you talking message encryption or Crypto transfers?
Either.
The lack of bios is an advantage for Pi
Disable wlan0, hci0, etc. and make persistent before saving image.
Also have a cheap old webcam for qr code transfers.
Easy and inexpensive to destroy drive.
Cost ~$100