DarkNode™ technology is a suite of network functionality that creates a device that has no open ports, does not respond to or acknowledge any network requests and is invisible to the network. It uses encrypted packets with dynamic keys and creates the equivalent of a black box with a lock: access is granted only using a valid key; access attempts without a valid key are not acknowledged and result in an inability to explore the network that resides within the black box. DarkNode devices authenticate with matched twins (hardware or software) and a certificate authority creating an impenetrable cyber perimeter. 3eTI DarkNode technology can be applied to both government and commercial critical systems requiring assured, secure connectivity through non-secure networks.