Abstract: A unidirectional secured network adapter to receive an at least one communication from an at least one device of plurality of devices of the secure network over an unsecured communication protocol which include a privilege data. The unidirectional secured network adapter writes the privilege data in a memory, converts the privilege data from first parallel. data stream to serial data stream and passes the serial data stream through an isolation unit, converts the serial data stream of the privilege data to a second parallel data stream and writes the privilege data in a read only memory. The unidirectional secured network adapter applies an unsecured communication protocol to the privilege data and transmits the privilege data to at least one device of the unsecured network.