These are interesting times for Universal Serial Bus (USB) security. With increasing pressure to limit network access to industrial control systems, industrial plant dependence upon USB removable media to transfer information, files, patches and updates has been greater than ever. At the same time, past research into USB threats has shown that portable USB drives are one of the top threat vectors impacting industrial control systems.
the research was done by Honeywell, which is one of the largest ICS global OEM
hope you will find it interesting
