Designed for use in secure defense and intelligence applications, this SDHN-2D-P 2-Port Dual-Head 4K DP-to-HDMI KVM Switch with CAC Port from IPGard features mechanical, electrical and optical signal isolation to prevent hacking and data leakage. It controls data relays using inverted signals, shielding connections from outside intrusion by forcing them to work one at a time. Each port uses its own isolated data channel and each unit features a non-reprogrammable ROM to protect the switch's functions.

The switch emulates the presence of a keyboard and a mouse for every attached computer through a USB cable, preventing direct connection between the peripherals and the connected computer. It allows users to assign specific peripheral devices to the CAC port. Once a peripheral device has been registered by an authenticated admin, users can then switch the connection between that device and the PC's along with KM switching.

The switch simulates a generic EDID as default, allowing it to operate most of the connected monitors. Both selected and non-selected computers maintain a constant connection with the unit's video emulation controllers, restricting discovery of newly connected monitors during switching operations. Upon activating the KVM, the unit will quickly and automatically learn new EDID for specific monitors. The unit then prevents unwanted and unsecure data from getting transmitted through DDC lines by means of secure EDID learning and emulation.