Patent ID: 8498206

Claim:
Network interface circuitry for a secure one-way data transfer from a Send Node to a Receive Node over a non-wireless data link, comprising: a send-only network interface card for transmitting data from the Send Node to the non-wireless data link, the send-only network interface card comprising a data transmitter, a first interface to the Send Node, a first interface circuit for controlling the flow of the data between the first interface and the data transmitter, an unpopulated space reserved for but not populated by a data receiver, and silkscreen words placed on the unpopulated space to indicate the send-only functionality of the send-only network interface card; and a receive-only network interface card for receiving the data from the non-wireless data link and transferring the received data to the Receive Node, the receive-only network interface card comprising a data receiver, a second interface to the Receive Node, a second interface circuit for controlling the flow of the data between the data receiver and the second interface, an unpopulated space reserved for but not populated by a data transmitter, silkscreen words placed on the unpopulated space to indicate the receive-only functionality of the receive-only network interface card, wherein the send-only network interface card is configured not to receive any data from the non-wireless data link, and the receive-only network interface card is configured not to send any data to the non-wireless data link, and wherein the send-only network interface card and the receive-only network interface card are separately administered and require independent authentication keys for communication management.