World Academic Union
The idea of increased information exchange is not completely new. For instance hill and aguirre already observed the growing recognition that there would be high utility in integrating the output of different entities involved in network security, including routers, firewalls, proxies, as well as host-based and network-based Intrusion Detection Systems (IDS). Likely, they were thinking of heterogeneous entities, a mix of various vendors' products and government products and prototypes. In spite of several standardization efforts that would enable it, that level of integration has not occurred.