Corporations and PCN vendors are incapable of taking action to improve the security posture of the current or future process environments without specific solution requirements. Just saying "we need firewalls and encrypted SCADA protocols" is not enough.
BCIT Group for Advanced Information Technology, “Good Practice Guide on Firewall Deployment for SCADA and Process Control Networks - Policy and Best Practice ID. 00157”, National Infrastructure Coordination Centre, UK , 23 February 2005
E. Byres, J. Carter, A. Elramly and D. Hoffman; “Worlds in Collision: Ethernet on the Plant Floor”, ISA Emerging Technologies Conference, Instrumentation Systems and Automation Society, Chicago, October 2002
