Why OT Security Is Different
Operational technology (OT) and industrial control systems (ICS) exist in a world where availability and safety are paramount. Unlike traditional IT, where confidentiality often leads, OT environments prioritize keeping operations running without interruption.
The Convergence Challenge
As IT and OT networks converge, industrial environments inherit IT-world threats — ransomware, unauthorized access, lateral movement — without the same security controls to defend against them.
A Framework for OT Security
- Asset Visibility: You can’t protect what you can’t see. Start with a comprehensive OT asset inventory.
- Network Segmentation: Separate IT and OT networks to contain threats and reduce attack surface.
- Risk Assessment: Evaluate risks specific to your operational environment, aligned with NIST 800-82.
- Secure Remote Access: If remote access is necessary, implement secure, monitored solutions.
- Monitoring and Detection: Deploy monitoring that understands OT protocols and can detect anomalies.
- Incident Response Planning: Build response plans that prioritize operational continuity.
Frameworks to Follow
Align your OT security program with established frameworks including NIST 800-82, ISA/IEC 62443, and CISA guidance. These provide structured, proven approaches to securing industrial environments.
Getting Started
OT security doesn’t require shutting everything down. A phased, careful approach can dramatically improve your security posture while maintaining operational continuity.