Too frequently security professionals only consider software vulnerabilities when considering the risks of connecting devices to their networks and systems. When it comes to considering potential risks of connected devices and the Internet of Things, not only must security professionals consider potential vulnerabilities in the software and firmware of these systems, but also physical vulnerabilities in hardware. This document considers the potential risk posed by hardware modification of seemingly innocuous hardware devices attached to critical systems, by showing how a simple KVM switch can be modified for use as a key logger. Continue reading