SC-30 Concealment and misdirection requirements

What SC-30 concealment and misdirection asks for

SC-30 requires your organization to define which concealment and misdirection techniques it will use, on which systems, and for which time periods, so that those techniques make it harder for adversaries to understand and target your environment. The control does not prescribe a specific technique. It asks you to decide, write down and apply the techniques that fit your risk. SC-30 is not assigned to any SP 800-53B baseline, so it applies to a system only when your organization selects it through tailoring or an overlay. Treat that selection as a deliberate decision, record the rationale in the system security and privacy plan, and expect an assessor to ask why it was included or excluded.

In practice, the techniques fall into three broad groups. Randomness means varying values an attacker might otherwise predict, such as network addressing, identifiers or timing. Changing processing locations means moving workloads or data between components or sites so that a fixed target is harder to map. Misleading information means presenting plausible but false details about the system, such as deceptive banners or misdirecting responses. Each technique addresses the same adversary risk: reconnaissance that depends on a stable, accurate picture of your environment. Illustrative example: an organization that rotates internal service addresses and removes version details from public responses has selected techniques from two groups, and it must still define the systems and periods where they apply.

The difficulty lies in the nature of the requirement. Because the organization defines the techniques, systems and time periods, there is no fixed answer to check against, and you must justify your choices in writing. The evidence is also design-level rather than tool output. Assessors examine documentation such as the list of techniques, system design documentation, configuration settings and architecture, and they test whether the documented design is what actually operates. Confirm with your assessor which artifacts they will accept before you build the evidence, and confirm the current procedure in the release you are assessed against by reading the SP 800-53A entry for SC-30 in the NIST SP 800-53 OSCAL content.

Which systems and decisions bring SC-30 into scope

SC-30 is not in any SP 800-53B baseline, so its scope starts with a deliberate choice to select it. Once selected, the work depends on which systems carry the defined techniques, which time periods apply, who operates them and whether a FedRAMP Rev5 class brings the control in.

Tailoring or overlay selection

Because SC-30 appears in no SP 800-53B baseline, it reaches a system only when the organization selects it through tailoring or an overlay. Record who made that decision, the risk it addresses and the systems it covers. Without that record, an assessor will find the control claimed in a plan but unsupported by any defined technique. Check that the selection survives each baseline review.

Systems that carry the techniques

SC-30 requires the organization to define which concealment and misdirection techniques apply to which systems. Start with internet-facing services, administrative interfaces and any system where an adversary would benefit from knowing the configuration. Each system in scope needs a named entry in the technique list, so the assessor can trace each technique to a system design document and its configuration settings.

Defined time periods

The control also asks the organization to define the time periods during which each technique operates. A technique that runs continuously needs a different configuration record from one that runs only during elevated threat conditions. Document the schedule, the trigger that changes it and who approves the change. Assessors test whether the defined periods match what the system actually does.

Architecture and engineering teams

Architecture teams hold the system design documentation and architecture views that assessors examine for SC-30. Platform engineers hold the configuration settings that implement techniques such as request randomization or changing processing locations. Both groups must agree on the technique list before evidence is gathered, because a configuration without a matching design record fails the examination.

Third-party hosting and services

Techniques that move processing or change resource locations may depend on a cloud provider, a managed platform or a content delivery service. Confirm in writing which of those techniques the provider controls, which the organization configures and what evidence the provider supplies. Inherited techniques need the same documented definition as internal ones, or the assessor cannot test them.

FedRAMP Rev5 class

FedRAMP's Rev5 baselines do not require SC-30 at Class B, C or D. A cloud service offering at those classes can still select SC-30 voluntarily, but it will not appear as a required control in the FedRAMP package. Confirm the class and the FedRAMP baseline version with the authorizing body before deciding whether SC-30 adds work beyond the required set.

How an assessor tests SC-30

This table maps the single SP 800-53A determination statement for SC-30 to the examine, interview and test methods an assessor uses, and to the assessment objects each method reviews. Read it as a checklist of what to have ready before the assessor arrives, and note where a documented technique list alone will not satisfy the determination statement.

Assessment element	What the assessor does	Evidence that passes	Where it usually fails
Determination statement	Checks whether the organization has defined concealment and misdirection techniques for defined systems and time periods, and whether those techniques are employed as defined	A written statement that names each technique, the systems it covers and the time periods it applies to	Techniques are described in general terms with no link to named systems or periods
Examine: list of techniques	Reads the list of concealment and misdirection techniques employed for organizational systems and confirms each entry is specific and bounded	A dated list with each technique, its target systems, its activation period and the owner who approved it	A list that names no specific system or time period, or that was never approved
Examine: system design documentation	Traces each listed technique into the design to confirm it is part of the intended architecture	Design documents that show where randomization, location changes or misleading information are built in	Techniques appear in policy but are absent from design documents
Examine: configuration settings and documentation	Compares the live or exported settings with the technique list and the stated time periods	Configuration exports, change records and settings documentation that match the list entry by entry	Settings drift from the list, or no record shows when a technique was turned on or off
Examine: system architecture	Checks the architecture diagrams to confirm the systems named in the list exist and that the techniques fit the topology	Current architecture diagrams that identify the systems, network zones and components covered by each technique	Diagrams are outdated or omit components that the technique list covers
Interview	Asks system owners, architects and security staff how each technique is chosen, operated and reviewed	Consistent answers across roles that match the documents and the configuration	Interviewees cannot describe the techniques or disagree with the written list
Test	Verifies that the technique operates as documented on the defined systems during the defined periods	Test records or demonstrations showing the technique working in the stated scope	No test has been run, or the test covers a system outside the listed scope

Selecting and implementing concealment and misdirection techniques

This sequence turns SC-30 from a line in a tailoring record into a documented, configured and verified set of techniques that an assessor can examine, interview staff about and test against the design.

Confirm SC-30 is selected in the tailoring record
The system owner and the authorizing official check the security plan's control selection to see whether SC-30 has been chosen. SP 800-53B does not assign SC-30 to any baseline, so it appears only when the organization adds it through tailoring or an overlay. If it is not selected, the record should say why it was left out, because an assessor will look for that reasoning. The step closes when the tailoring record names SC-30, its owner and the reason for selection or exclusion.
Define the systems and time periods in scope
The control asks the organization to set its own parameters, so the security team defines which systems the techniques cover and during which periods they apply, such as continuously or only during elevated threat conditions. The architecture team and the risk owner approve the list. The output is a scoped statement that names each system and its periods, and it is the first thing an assessor compares against the design documentation.
Choose techniques that fit the architecture
The team selects concealment and misdirection techniques that suit the environment, such as variable addressing, changing processing locations or misleading responses, and records how each one reduces what an adversary can learn about the system. Techniques are chosen with operations staff so they do not break availability, logging or incident response. Confirm with the platform vendor and your own engineers which techniques the chosen components can support. The output is a list of selected techniques with the systems each one applies to.
Document the techniques in the system design
The selected techniques are written into the system design documentation and system architecture diagrams so that the design shows where each one operates. The document also explains how it interacts with logging, monitoring and access control, so reviewers can see that the techniques do not hide events from defenders. An assessor will examine this design documentation directly, so the step is complete when every technique on the list appears in the design with its location.
Configure the techniques in the platform
Engineers apply the techniques in the self-hosted platform, for example by setting the relevant configuration parameters, scheduling changes or deploying components to alternate locations inside the approved boundary. Changes go through the organization's configuration management process, and each setting is recorded with its owner and date. Implementation partners can prepare configurations and runbooks, but the organization approves them. The step closes when the configuration baselines and change records show each technique as set up.
Verify the techniques operate as designed
Testers check that each configured technique is active and that it behaves as the design states, using configuration reviews and, where appropriate, controlled tests in a non-production environment. The test confirms that the technique does not disable required audit records or break authorized access. Results are written down with the method used, the person who ran the test and any defects found. The step is complete when each technique has a recorded test result and any defect has an assigned fix.
Record the decision rationale for the assessor
The organization writes a short rationale explaining why each technique was chosen, what risk it addresses, what it does not address and which residual risk the authorizing official accepted. The rationale links to the tailoring record, the design and the test results so an assessor can follow the chain. Reviewers update it when systems or threats change. The output is a signed decision record that connects the selection, the design, the configuration and the verification for SC-30.

Evidence that passes an SC-30 assessment

SC-30 has a single determination statement, so an assessor will look for one coherent story: which concealment and misdirection techniques the organization chose, where they apply, and how that choice was approved and kept current. The cards below cover the artifacts that answer each examine object and the habits that keep them aligned with the system security plan.

Approved technique list

This is the core artifact. It names each concealment or misdirection technique the organization employs, the defined systems it covers, and the time periods in which it applies, which are the organization-defined parameters SC-30 requires. Record the approver, the approval date and the rationale for each technique. Check that every entry maps to a parameter value and that no technique is listed without a system it protects. Assessors compare this list against the system design and configuration evidence, so any mismatch will surface during examination.

Architecture and design documentation

Architecture and system design documents show where each approved technique sits in the system. They should identify the components that change processing locations, present misleading information or randomize behavior, and the trust boundaries those components cross. Keep diagrams versioned with the system and review them whenever a component is added or moved. An assessor who cannot trace a listed technique to a specific component in the architecture will treat the technique as unimplemented.

Configuration exports and settings records

Configuration exports show that a technique is active, not just planned. Export the relevant settings from the platforms that implement each technique, such as traffic rules, routing or address policies and randomization parameters, and store them with the date and source host. Pair each export with the associated configuration documentation so the assessor can read what each setting does. Re-export after every change window so the evidence reflects the running state rather than an earlier design.

Change records for concealment controls

Change tickets show how techniques were introduced, modified or retired over time. Each record should link the change to the approved technique list entry it affects, name the reviewer, and state whether the system security plan was updated. Records of rejected or reverted changes are also useful because they show the list is governed rather than ceremonial. Confirm that your change tool retains these records for as long as your assessment cycle requires.

Tailoring decision and rationale

SP 800-53B does not assign SC-30 to any baseline, so its presence in your control set is a deliberate tailoring decision. Record who selected SC-30, why it was selected for this system, and which risks it addresses. If the decision was to exclude it, document that rationale too, because an assessor will ask. Store the decision alongside the baseline selection in the plan and review it when the system's threat profile or mission changes.

System security plan linkage

The system security plan is where the assessor starts. It should state that SC-30 is implemented, summarize the techniques, and point to the approved list, architecture sections and configuration evidence by location. Each time the list or architecture changes, update the plan in the same cycle. Use a simple cross-reference table in the plan so every technique has a traceable path from requirement to implementation to evidence, and confirm the plan's approval date matches the most recent change to the list.

Open-source tools that support SC-30 evidence

Coraza (Apache-2.0) is a web application firewall that is compatible with ModSecurity SecLang rulesets and the OWASP Core Rule Set. It defends against attacks such as SQL injection, cross-site scripting and code injection, and it integrates with Caddy, HAProxy, Traefik and Nginx, so it can sit in front of the web tier your architecture documentation describes. Coraza does not satisfy SC-30 on its own. It supports the configuration and architecture evidence an assessor examines, because the rules and their placement show what traffic handling is in place.

Rule set as configuration evidence: Export the SecLang rule files and keep their version history, so the settings an assessor reviews match what runs in production.
Placement in the architecture: Document which front-end proxy hosts Coraza and which applications it protects, matching the system design documentation.
Supported integrations: Record whether you run Caddy, HAProxy, Traefik or Nginx, because the integration determines where the configuration lives and how it is exported.
Change control: Route rule changes through your configuration management process so each change has an owner, an approval and a record.

Confirm with your assessor which rule changes count as implementing a technique you selected, and check the chosen integration against the Coraza documentation before you write the evidence plan.

What meeting SC-30 costs in money and effort

This table lists the cost components of putting SC-30 into practice, who is paid for each, whether it is one-time or recurring, and what moves it up or down. Use it to build a written quote request, since no supplied source gives a dollar figure or duration for SC-30 work.

Cost component	Who is paid and for what	One-time or recurring	What drives it up or down
Design and architecture review	Internal architects or an implementation partner decide which concealment or misdirection techniques apply to which systems and time periods	One-time, with revisits when architecture changes	Number of systems in scope, how many defined parameters the organization sets, and how often system design changes
Tooling licenses	Open-source components such as OPNsense or Coraza carry no license fee, so the cost is the time to select, configure and test them	One-time setup, recurring patching	Whether the chosen techniques need commercial add-ons, and how much custom configuration the design requires
Hosting for self-hosted tools	Infrastructure team for compute, storage and network capacity that the tools run on	Recurring	Traffic volume, redundancy design and whether the tools share infrastructure with other controls
Engineering to implement techniques	Platform and security engineers configure techniques such as randomized responses, changed processing locations or misleading information	One-time build, recurring tuning	Complexity of the techniques selected, integration with existing monitoring, and the amount of testing needed before production
Evidence upkeep	Compliance or security staff keep configuration records, technique lists and change history current for assessors	Recurring	Frequency of system changes, number of owners, and whether evidence is generated automatically from configuration management
Internal testing and review	Security testers check that the techniques work as designed and do not disrupt operations	Recurring, often per release	Size of the attack surface, whether testing is fixed-scope or retained, and the frequency of changes
Auditor or assessor sampling	The independent assessor examines documentation, configuration and architecture, and may interview staff; the organization pays the assessor	Recurring with each assessment cycle	Number of systems sampled, quality of the technique list, and how quickly staff can produce records
External review of the design	Independent specialists review whether the chosen techniques meet the parameters the organization defined	Optional, one-time or periodic	Novelty of the design, regulatory pressure, and whether internal staff have the expertise

Who does what for SC-30

The organization owns the control decision. Because SC-30 is not in any SP 800-53B baseline, the first accountable act is deciding whether it belongs in the system's control set at all, through tailoring or an overlay, and then defining which concealment and misdirection techniques apply, to which systems and for which time periods. That decision, and any acceptance of the residual risk where the control is not selected, sits with named system owners and the authorizing official, not with a vendor.

Selection and tailoring: record whether SC-30 is selected, the rationale, and the parameter values that define the techniques and periods.
Risk acceptance: document who accepts the risk when the control is not selected and when the chosen techniques are only partly deployed.
Ownership: assign a control owner who can answer assessor questions about the chosen techniques.
Policy linkage: tie the decision to the system security and privacy plan and to the SC-1 policy.
Review: schedule reassessment when architecture or threat conditions change.

Before engaging any partner, confirm the selection and parameter values in writing, since they define the scope every later task is measured against.

Where SC-30 efforts usually fall short

SC-30 is a control that organizations often select on paper and then fail to operate. The gaps below cluster around three problems: the techniques are not chosen or scoped for specific systems, the choices do not stay true in design and configuration, and the control is confused with neighboring SC controls. Each card names one gap and the check that closes it.

Techniques selected without a tailoring record

SC-30 is not in any SP 800-53B baseline, so its presence in a system's control set is a deliberate tailoring decision. When no one records why SC-30 was selected, or why it was left out, an assessor has no rationale to test. Check that the system security and privacy plan or tailoring worksheet names SC-30, the reason for selecting it, and the owner who approved it.

Generic technique lists without scope

SC-30 asks the organization to define the concealment and misdirection techniques and the systems and time periods where they apply. A list that says the organization uses randomization or deception, without naming the systems, environments or periods, does not meet the defined parameters. Confirm that each technique is tied to named systems, such as an internet-facing application tier, and to a stated period of operation.

Techniques that exist only in policy

A policy that describes moving processing locations or varying service responses is not evidence that the technique runs. Assessors look for the configuration, scheduled job or design element that performs the technique. For each listed technique, ask the system owner to show the setting, pipeline or deployment record that implements it and to show that it operated during the period in scope.

Design documents that drift from configuration

Architecture diagrams and design notes often describe a fixed topology while the running environment changes through autoscaling, redeployments or firewall edits. SC-30 evidence depends on the examined design documentation and system configuration matching each other. Compare the design document with exported configuration from the firewall, orchestrator and reverse proxy, and record every difference as a finding.

No link to the system security plan

When the SSP describes SC-30 in generic terms or omits it, the control has no owner, no implementation statement and no link to the assessment. An assessor reading the plan cannot trace a technique to a system component. Require an implementation statement for SC-30 that names the techniques, the components that run them, the responsible role and the monitoring evidence, and cross-reference it to the assessment report.

Confusion with SC-26 and related controls

SC-30 is often mixed up with SC-26 Decoys, SC-25 Thin nodes and SC-29 Heterogeneity, which share the theme of making targeting harder. SC-26 requires decoy components that attract attackers, a different mechanism from SC-30's broader techniques. Write a short boundary note for each of these controls in the SSP, stating what it covers, what it does not cover and which component implements it, so each control is assessed on its own evidence.

Questions buyers ask about SC-30

Is SC-30 required by default under NIST SP 800-53?

No. SC-30 is not assigned to any SP 800-53B baseline (low, moderate, high or privacy), so it applies only when your organization selects it through tailoring or an overlay, or when a contract or authorizing body requires it. Appendix C of SP 800-53 Rev. 5 lists it as implemented by the organization and marks it as an assurance-related control. Before planning work, ask your authorizing official or contracting authority whether they expect SC-30 in your control set. FedRAMP's Rev5 baselines also do not require it at Class B, C or D, so a cloud service pursuing that path should confirm the same thing with its assessor.

How much effort does SC-30 take to implement and assess?

The effort depends on how many techniques you decide to employ and how many systems they cover. SC-30 has three organization-defined parameters and five control enhancements (four active, one withdrawn), and none of those enhancements is in an SP 800-53B baseline. Assessment uses one determination statement, so the evidence is concentrated in a list of chosen techniques, design documentation, configuration settings and architecture. Most of the cost is internal decision-making about which techniques are appropriate and defensible, followed by documenting them. No figure for effort is supplied here, so ask your assessor how many systems and techniques they expect to review before agreeing a scope.

How long does it take to prepare SC-30 evidence?

The duration depends on whether your architecture already has the technical features that SC-30 techniques depend on, and on how quickly your organization can approve the chosen approach. Preparation usually runs through four steps: defining the techniques and the systems and periods they cover, reviewing system design and architecture, configuring and testing the controls, and writing the documentation an assessor will examine. No timeline is supplied for this work, so treat any schedule as something to agree in a written plan with your implementation partner and confirm against your assessment calendar.

What does SC-30 need from the internal team?

SC-30 needs decisions and documentation more than new infrastructure. Your team must define which concealment and misdirection techniques apply, which systems and time periods they cover, and who owns each decision. Architecture owners need to confirm how the design supports those techniques, and operations staff need to produce configuration settings and change records. Security and compliance leads should keep the technique list aligned with the system security and privacy plan and with the risk assessment that justified it. Ask early whether the organization has an approval path for security design choices of this kind.

Can we implement and document SC-30 in-house?

Yes, an organization can do this in-house if it has staff who understand the architecture, the control's assessment procedure and the threat model behind each technique. The work is mainly governance and documentation, which many internal teams already run for other SP 800-53 controls. An outside partner is most useful when the team lacks architecture or hardening experience, or when the technique list needs to be tested rather than simply written down. Any partner prepares systems and evidence, but only an independent assessor issues assessment results, and the organization remains accountable for the control.

What does an implementation partner change for SC-30?

An implementation partner changes the speed and confidence of the technical and evidence work, not who owns the control. DeployOpen plans, implements, hardens and documents self-hosted open-source platforms inside your own infrastructure, and can prepare configurations and evidence for an assessor. Engagements are fixed-scope, with deliverables and timelines agreed in writing before work starts. DeployOpen does not issue audit reports or attestations. Ask any partner to show how it will map each chosen technique to the evidence an assessor expects, and to explain which parts of the work it will hand over to your team.

How does SC-30 relate to SC-26 and SC-29?

SC-30 is the umbrella control for techniques that make targeting harder, while SC-26 and SC-29 are two specific ways of doing that. SC-26 covers decoys such as honeypots that attract attackers so their techniques can be detected and analyzed. SC-29 covers heterogeneity, using diverse technologies so one exploited vulnerability does not compromise every component. Related controls for SC-30 in the Release 5.2.0 catalog also include SC-25, SC-44 and SI-14. In practice, you can cite a decoy or heterogeneity design as one of the techniques under SC-30, but confirm with your assessor whether they want each one documented against its own control.

How DeployOpen prepares SC-30 systems and evidence

SC-30 is a tailoring decision, not a baseline requirement, so the work starts with agreeing whether the organization selects it and for which systems. DeployOpen then helps prepare the technical design, configuration records and documentation an independent assessor would examine, while the organization keeps ownership of the control and its risk decisions.

How we scope

Confirm with the organization whether SC-30 is selected through tailoring or an overlay, and for which systems.
Record the defined concealment and misdirection techniques, the systems they cover and the time periods they apply to.
Agree deliverables, exclusions and timelines in writing before any work begins, since engagements are fixed-scope.

How we build

Implement the agreed techniques on self-hosted open-source platforms inside the client's own infrastructure, such as OPNsense rules and Coraza WAF configuration.
Configure and document system settings and architecture so an assessor can trace each selected technique to its implementation.
Test the configured techniques in the client's environment and record results against the agreed scope.

How we hand over

Deliver system design documentation, configuration baselines and the list of techniques in the form the assessor will examine.
Map each deliverable to the SC-30 assessment objects in SP 800-53A so gaps are visible before the assessment begins.
Transfer ownership of the controls, runbooks and evidence to the client's team, with the independent assessor's role kept separate.

How we support

Ongoing support, upgrades and continuous testing are available as a retainer after handover.
Review changes to the selected techniques and their configurations when systems or threats change, and update the documentation.
Ask any implementation partner to confirm how it will keep SC-30 evidence current between formal assessments.