The Failure Mechanism in OT Systems: Identity Boundaries at Execution Context

Opening Position Operational technology security does not fail because operators lack awareness. It fails because the control layer enforces no identity boundary at runtime. IT/OT convergence has been treated as a networking problem - segment the traffic, firewall the boundary, monitor the flows. This assumes the protocols behind the boundary enforce their own trust. They do not. OPC UA, Modbus TCP, DNP3 over IP, and BACnet all permit command execution without runtime identity validation in thei