Foundations for OT Cybersecurity: Asset Inventory Guidance for Owners and Operators

What the authority record establishes

The joint guide describes a regularly updated OT asset inventory and taxonomy tied to function and criticality as a foundation for risk, vulnerability, architecture, and incident-response work.

Nonbinding guidance by itself

The exact official title, issuing body, jurisdiction, version or application record, and linked source define the scope of this page. Readers should not transfer the authority's status to a commercial product or infer transaction-, patient-, system-, site-, or organization-specific applicability from this summary.

Why it matters to this market

It raises the evaluation bar from device counts to governed identity, taxonomy, criticality, ownership, dependency, lifecycle, and use across operating functions.

Affected operating stages

• Scope
• Collect
• Normalize
• Classify
• Maintain
• Use

Capabilities to examine

Passive OT Asset Discovery And Inventory

Ask how the system or service identifies the controlling source and version, applies customer-specific interpretation, handles exceptions, preserves human judgment, and retains evidence for passive OT asset discovery and inventory.

Active OT-Safe Discovery And Query Governance

Ask how the system or service identifies the controlling source and version, applies customer-specific interpretation, handles exceptions, preserves human judgment, and retains evidence for active OT-safe discovery and query governance.

Topology, Communication, And Dependency Mapping

Ask how the system or service identifies the controlling source and version, applies customer-specific interpretation, handles exceptions, preserves human judgment, and retains evidence for topology, communication, and dependency mapping.

Asset Criticality And Operational Context

Ask how the system or service identifies the controlling source and version, applies customer-specific interpretation, handles exceptions, preserves human judgment, and retains evidence for asset criticality and operational context.

Vulnerability And Exposure Correlation

Ask how the system or service identifies the controlling source and version, applies customer-specific interpretation, handles exceptions, preserves human judgment, and retains evidence for vulnerability and exposure correlation.

Firmware, SBOM, And Component Intelligence

Ask how the system or service identifies the controlling source and version, applies customer-specific interpretation, handles exceptions, preserves human judgment, and retains evidence for firmware, SBOM, and component intelligence.

Configuration, Baseline, And Change Monitoring

Ask how the system or service identifies the controlling source and version, applies customer-specific interpretation, handles exceptions, preserves human judgment, and retains evidence for configuration, baseline, and change monitoring.

Multi-Site Sensor, Data, And Policy Management

Ask how the system or service identifies the controlling source and version, applies customer-specific interpretation, handles exceptions, preserves human judgment, and retains evidence for multi-site sensor, data, and policy management.

IT Security-Operations Integration And APIs

Ask how the system or service identifies the controlling source and version, applies customer-specific interpretation, handles exceptions, preserves human judgment, and retains evidence for IT security-operations integration and APIs.

Affected buyer audiences

• asset owners
• OT security teams
• engineering
• maintenance
• incident response

Implementation questions

• Which entities, products, populations, transactions, systems, sites, or jurisdictions are actually within scope?
• What is binding, what is guidance, and what is a technical or consensus standard?
• Which publication, adoption, effective, application, transition, and enforcement dates differ?
• Who owns legal, clinical, quality, regulatory, policy, or operational interpretation?
• How will a source revision affect open work and historical decisions?

Interpretation boundary

The guidance does not endorse a discovery method or permit unsafe active scanning of a production environment.