You can use SNA session-level encryption in the same way that it is currently used in SNA networks. In this way, the application can be assured that the traffic is received from the sender and that it has not been modified. This provides a reliable transmission method that is useful if sections of the network remain SNA (non-EE) and the data being transmitted is especially sensitive in nature. If the only section of the network that is unsecured is the IP network, or if authentication is the only requirement, other methods might work better for your needs.