An attacker loads malicious code onto a USB memory stick in order to
						infect any supply chain-relevant machine which the device is plugged in to.
						This initially infected machine could then propogate the infection to
						products moving through the supply chain process. USB drives present a
						significant security risk for business and governmnent agencies. Given the
						ability to integrate wireless functionality into a USB stick, its possible
						to design malware that not only steals confidential data, but sniffs the
						network, or monitor keystrokes, and then exfiltrates the stolen data
						off-site via a Wireless connection. Also, viruses can be transmitted via the
						USB interface without the specific use of a memory stick. The attacks from
						USB devices are often of such sophistication that experts conclude they are
						not the work of single individuals, but suggest state sponsorship.