'A developer has created the USG, "a small, portable hardware USB firewall...to prevent malicious USB sticks and devices laden with malware from infecting your computer." An anonymous reader quotes ZDNet:

The problem is that most computers automatically trust every USB device that's plugged in, which means malicious code can run without warning... Cars, cash registers, and some ATMs also come with USB ports, all of which can be vulnerable to cyberattacks from a single USB stick. That's where the USG firewall comes in...a simple hardware serial link that only accepts a very few select number of safe commands, which prevents the device from executing system commands or intercepting network traffic. That means the data can flow from the USB device, but [it] effectively blocks other USB exploits.

The firmware has been open sourced, and the technical specifications have also been released online "to allow anyone to build their own from readily available development boards."'

-- source: https://hardware.slashdot.org/story/17/03/11/1658238

Cheers, Peter