A system includes a first computer processor that receives a data transmission from a second computer processor. The data transmission includes a client certificate authentication and a user-based authentication. If the incoming information cannot be authenticated by the client certificate in a first layer of the system landscape, then there is no further data transmission to a second layer. If the first layer can authenticate the client certificate authentication, the system landscape transmits the data transmission to the second layer. If the second layer cannot authenticate the user-based authentication, the system prevents the data transmission from being processed at the second layer. If the second layer can authenticate the user-based authentication, the system processes the data transmission at the second layer.