[Cryptography] USB firewall/condom HW/SW

[John-Mark Gurney]

Jerry Leichter wrote this message on Mon, Mar 13, 2017 at 18:20 -0400:
> Can we consider the realities of such a device?  Can a useful device like this actually be built?  If I plug a memory stick into it and the firmware has been modified to actually report that it's a keyboard, and it starts typing commands into the console ... how could the USB firewall know?  It sees a device that identifies itself as a valid keyboard.  How can it know that it was supposed to be something else?

I'd imagine it'd be easy to add a slider switch that you can set to
select what type of device, or auto for making things quick and easy..
That way you can force the thumb drive to only be a mass storage
device, and not be a HID...

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."