In the CIM RMI protocol, each request from the client to the WBEM server contains a message authenticator that is constructed from the message data. A one-way digest is also created with a session key that is established during the authentication exchange.
The WBEM server verifies this message authenticator. This verification guarantees that the request came from the same client that was authenticated and that the message was not modified or replayed on its way to the server.
If the message was modified, replayed, or created by a source that was not the original client, the WBEM server returns a CIM security exception. This exception contains the CHECKSUM_ERROR error. The WBEM server also writes a log message to the WBEM log.