RA-2 — Security Categorization

Official NIST control content

Control statement

a.Categorize the system and information it processes, stores, and transmits;
b.Document the security categorization results, including supporting rationale, in the security plan for the system; and
c.Verify that the authorizing official or authorizing official designated representative reviews and approves the security categorization decision.

Official NIST discussion

Discussion

Security categories describe the potential adverse impacts or negative consequences to organizational operations, organizational assets, and individuals if organizational information and systems are compromised through a loss of confidentiality, integrity, or availability. Security categorization is also a type of asset loss characterization in systems security engineering processes that is carried out throughout the system development life cycle. Organizations can use privacy risk assessments or privacy impact assessments to better understand the potential adverse effects on individuals. [CNSSI 1253](#4e4fbc93-333d-45e6-a875-de36b878b6b9) provides additional guidance on categorization for national security systems. Organizations conduct the security categorization process as an organization-wide activity with the direct involvement of chief information officers, senior agency information security officers, senior agency officials for privacy, system owners, mission and business owners, and information owners or stewards. Organizations consider the potential adverse impacts to other organizations and, in accordance with [USA PATRIOT](#13f0c39d-eaf7-417a-baef-69a041878bb5) and Homeland Security Presidential Directives, potential national-level adverse impacts. Security categorization processes facilitate the development of inventories of information assets and, along with [CM-8](#cm-8) , mappings to specific system components where information is processed, stored, or transmitted. The security categorization process is revisited throughout the system development life cycle to ensure that the security categories remain accurate and relevant.

Original Bare Metal Cyber perspective

From control text to operational evidence

Use Security Categorization as a testable risk decision. Translate the official statement into accountable people, repeatable processes, configured technology, and evidence that demonstrates the outcome over time. In this family, pay particular attention to risk framing, threat and vulnerability analysis, impact, criticality, and response decisions.

Implementation workflow

Define the control boundary, responsible owner, inherited portions, and systems or processes in scope.
Resolve each organization-defined parameter before declaring the control implemented.
Document how the implementation satisfies every clause of the official control statement.
Collect evidence as a normal byproduct of operation rather than only before an assessment.
Review exceptions, changes, and monitoring results on a risk-based cadence.

Evidence examples

risk assessments and threat models
vulnerability findings and prioritization records
supply-chain risk assessments
risk response and acceptance decisions

Common failure patterns

risk registers detached from technical evidence
vulnerability severity treated as business impact
assessments not updated after material change
accepted risks have no owner or expiration

Questions practitioners should ask

What risk decision is this control intended to support in this system?
Which parts are implemented locally, inherited, shared, or not applicable—and what evidence supports that decision?
Do the documented narrative, deployed configuration, operating process, and collected evidence agree?
What event or threshold requires the implementation to be reviewed or changed?

Official NIST SP 800-53A content

Assessment objectives and methods

Show the assessment objective

RA-02a.the system and the information it processes, stores, and transmits are categorized;
RA-02b.the security categorization results, including supporting rationale, are documented in the security plan for the system;
RA-02c.the authorizing official or authorizing official designated representative reviews and approves the security categorization decision.

Examine

Risk assessment policy
security planning policy and procedures
procedures addressing security categorization of organizational information and systems
security categorization documentation
system security plan
privacy plan
other relevant documents or records

Interview

Organizational personnel with security categorization and risk assessment responsibilities
organizational personnel with security and privacy responsibilities

Test

Organizational processes for security categorization

Official relationships

Related controls

These relationships come from the official OSCAL catalog. They indicate useful dependencies or context, not automatic inheritance or equivalence.

Official NIST enhancements

Control enhancements

Enhancements add specificity, strength, or scope to the base control. Baseline badges show explicit selections in the official SP 800-53B OSCAL profiles.

Official NIST control enhancement

RA-2(1) — Impact-level Prioritization

Conduct an impact-level prioritization of organizational systems to obtain additional granularity on system impact levels.

Official discussion

Organizations apply the "high-water mark" concept to each system categorized in accordance with [FIPS 199](#628d22a1-6a11-4784-bc59-5cd9497b5445) , resulting in systems designated as low impact, moderate impact, or high impact. Organizations that desire additional granularity in the system impact designations for risk-based decision-making, can further partition the systems into sub-categories of the initial system categorization. For example, an impact-level prioritization on a moderate-impact system can produce three new sub-categories: low-moderate systems, moderate-moderate systems, and high-moderate systems. Impact-level prioritization and the resulting sub-categories of the system give organizations an opportunity to focus their investments related to security control selection and the tailoring of control baselines in responding to identified risks. Impact-level prioritization can also be used to determine those systems that may be of heightened interest or value to adversaries or represent a critical loss to the federal enterprise, sometimes described as high value assets. For such high value assets, organizations may be more focused on complexity, aggregation, and information exchanges. Systems with high value assets can be prioritized by partitioning high-impact systems into low-high systems, moderate-high systems, and high-high systems. Alternatively, organizations can apply the guidance in [CNSSI 1253](#4e4fbc93-333d-45e6-a875-de36b878b6b9) for security objective-related categorization.

Assessment objectives and methods

an impact-level prioritization of organizational systems is conducted to obtain additional granularity on system impact levels.

Examine

Risk assessment policy
security and privacy planning policy and procedures
procedures addressing security categorization of organizational information and systems
security categorization documentation
system security plan
privacy plan
other relevant documents or records

Interview

Organizational personnel with security categorization and risk assessment responsibilities
organizational personnel with security and privacy responsibilities

Test

Organizational processes for security categorization

Source record

Authoritative sources

Bare Metal Cyber is an independent educational publisher and is not affiliated with or endorsed by NIST. Official control requirements and interpretations remain with NIST and the responsible authorizing organization.