The North American Electric Reliability Corporation (NERC) develops and enforces reliability standards. The NERC Critical Infrastructure Protection (CIP) standards provide a security framework for the protection of Critical Infrastructures.
The Fox DataDiode provides a hardware-enforced one-way method to transfer data and works as a data diode device as described in the NERC document CAN-0024. It uses a specialized non-routable protocol that enables one-way data transfer with an assured high level of data integrity while protecting cyber assets inside the Electronic Security Perimeter (ESP). Proxy servers on either side of the Fox DataDiode are connected to networks, either the upstream or the downstream network, using regular network connections.