Controlling the flow of data between a high security network and a lower security network is a must-have capability for military, intelligence, and critical infrastructure operations. Data diode technology is the most effective and efficient option for achieving this goal, whether data must travel in one direction or two. Some vendors whose products lack the capabilities of true data diodes—for example, the ability to provide secure two-way communication—position their products as “unidirectional gateways” and attempt to describe their limitations as advantages.
