This read-create value is the shared secret between the RADIUS Dynamic Authorization client and RADIUS server, maintained across reboots, though all implementations must return an empty string on a read even though the official access level is read-create. An admin sets this to the same secret configured on the RADIUS server so dynamic authorization requests between them can be authenticated, but should not expect to be able to verify the configured value by reading it back. For example, an admin configuring this object with a shared secret would need to confirm it was set correctly by other means, such as testing an actual disconnect request, since reading this object always returns empty.