Secure Authentication

The WinCC OA DNP3 driver supports Secure Authentication (SA) version 5 as defined in IEEE Standard. 1815-2012 section 7. This allows a device to request authentication for critical operations. What a critical operation is, is up to the device configuration and cannot be defined by the DNP3 driver. If the driver is executing a critical operation (e.g. send a binary command), the device requests authentication. If the driver can successfully authenticate, the operation is executed. Otherwise it is rejected.