Blueprint 02
ICS/SCADA Drift Enforcement
Real-time integrity monitoring for industrial control systems with deterministic resource bounds. Designed for environments where predictable timing and bounded memory are critical.
Dragos, Claroty, NozomiFIG. 4-5, Claims 5, 11
1. Target System
Industrial Control Systems (ICS), SCADA networks, Distributed Control Systems (DCS), and Operational Technology (OT) environments including power grids, water treatment facilities, manufacturing plants, and transportation systems.
2. Threat Model
Firmware modification during maintenance windows
Configuration drift from baseline state
Unauthorized PLC logic changes
Replay attacks on control commands
Supply chain compromise of control software
3. Integration Points
Telemetry Ingestion
Push-based sensor data with signed requests
Drift Detection
RANGE/THRESHOLD rules with configurable tolerances
Enforcement Actions
ALERT / ISOLATE / SAFE-STATE responses
O(1) Processing
Bounded queues, deterministic resource usage
┌─────────────────────────────────────────────────────────────────┐ │ ICS/SCADA ENVIRONMENT │ │ │ │ ┌──────────┐ ┌──────────┐ ┌──────────┐ ┌──────────┐ │ │ │ PLC │ │ RTU │ │ HMI │ │ Sensor │ │ │ └────┬─────┘ └────┬─────┘ └────┬─────┘ └────┬─────┘ │ │ │ │ │ │ │ │ └───────────────┴───────────────┴───────────────┘ │ │ │ │ │ ┌──────────▼──────────┐ │ │ │ Local Governance │ │ │ │ Engine │ │ │ │ ┌──────────────┐ │ │ │ │ │ O(1) Process │ │ │ │ │ │ Bounded Queue│ │ │ │ │ └──────────────┘ │ │ │ └──────────┬──────────┘ │ │ │ │ │ ┌────────────────┼────────────────┐ │ │ ▼ ▼ ▼ │ │ ┌────────┐ ┌────────┐ ┌────────┐ │ │ │ ALERT │ │ISOLATE │ │SAFE- │ │ │ │ │ │ │ │STATE │ │ │ └────────┘ └────────┘ └────────┘ │ └─────────────────────────────────────────────────────────────────┘
4. Resource Guarantees
O(1) Per-Event Processing
Constant-time operations regardless of history depth
Bounded Memory Queues
Configurable limits with backpressure (HTTP 429)
5. Measurable Outcomes
Tamper-evident audit trails for regulatory compliance
Real-time drift detection with sub-second response
Deterministic resource usage for real-time environments
Automatic enforcement without operator intervention
Sample Bundle
SCADA telemetry enforcement variant