SC-36: Distributed Processing and Storage

Quick-reference card

What this control requires

SC-36 requires you to distribute processing and storage components across multiple physical locations or logical domains to prevent single-point compromise. Rather than letting all sensitive workloads run on one server cluster or reside in one database, this control pushes organizations to spread those assets across independently managed boundaries.

In practice, that means identifying which processing and storage components carry your highest-consequence data, then placing them across locations or domains that each maintain their own authentication perimeter and monitoring surface. The distribution doesn’t require a single primary site. Instead, it allows for parallel processing and storage, increasing redundancy while multiplying the effort an adversary needs to compromise the full dataset.

The operational goal, consistent with the broader System and Communications Protection family, is structural resilience. By segmenting where data lives and where computation happens, you force attackers to breach multiple independent systems rather than one, and you give your detection capabilities more boundaries to watch.

Why it matters

Under the NIST SP 800-53 framework, organizations that consolidate all sensitive processing and storage in a single location are making an architectural bet that one set of access controls, one monitoring boundary, and one set of event logs will hold against a determined adversary. That bet fails more often than most security teams expect.

When every critical dataset sits behind a single access point, an attacker who compromises that boundary owns everything. Automated collection tools (T1119) can systematically sweep and stage an entire sensitive dataset within hours. The same access that enables reading the data also enables manipulating it through stored data manipulation (T1565.001), whether to alter financial records, corrupt backup copies, or cover exfiltration tracks. Because all data resides in one place, the attacker can clear a single set of event logs (T1070.001) to remove evidence of the operation.

Distributed architectures fundamentally change this calculus. To collect a complete dataset, an attacker must compromise multiple, independently administered systems. Each system presents its own authentication boundary, its own monitoring surface, and its own log store that can’t be cleared from a single access point. The work factor for complete exfiltration scales with the number of independent locations, and the probability of detection scales with the number of monitored boundaries the attacker must cross.

What attackers exploit

• Centralized data stores as single exfiltration targets — Once inside a centralized file server, database, or document repository, automated collection (T1119) lets attackers stage the entire dataset for extraction within hours
• Stored data manipulation (T1565, T1565.001) — Access to a single data store lets attackers modify financial records, corrupt backups, or plant false information without needing to compromise additional systems
• Centralized log clearing (T1070, T1070.001, T1070.002) — When all event logs live in one place, a single privilege escalation lets the attacker erase evidence of collection and manipulation
• Lack of independent monitoring boundaries — A single-site architecture means one compromised monitoring system blinds the entire detection capability

For high-consequence data like master encryption keys, national security information, or critical intellectual property, SC-36 represents a structural control that limits the damage ceiling of any single intrusion.

How to implement

The biggest challenge with SC-36 isn’t deciding whether to distribute. It’s deciding what to distribute and how many independent boundaries you need to create a meaningful increase in attacker work factor.

For your organization

Start by mapping your highest-consequence data and identifying which processing and storage components currently share a single location, authentication boundary, or administrative domain.

Step 1 — Classify and inventory data flows. Build a data flow diagram that shows where sensitive information is processed and stored. Identify single points of concentration, particularly centralized file servers, monolithic databases, and shared document repositories. Your system architecture documentation within the NIST SP 800-53 framework should reflect these flows.

Step 2 — Define distribution boundaries. Determine whether you’ll distribute across physical locations, logical domains, or both. Physical distribution means placing processing and storage in geographically separate facilities. Logical distribution means using separate network segments, virtual private clouds, or independently administered database clusters within the same facility. Each boundary should maintain independent authentication and access controls.

Step 3 — Implement independent monitoring per boundary. Each distributed location or domain needs its own logging infrastructure, intrusion detection, and alerting pipeline. The goal is to ensure that compromising one location’s logs doesn’t blind you to activity at the others. Feed all logs into a centralized SIEM for correlation, but store source logs locally at each boundary.

Step 4 — Establish synchronization and consistency controls. Distributed architectures introduce data consistency challenges. Define replication policies, conflict resolution procedures, and recovery point objectives for each distributed component. Document these in your contingency plan alongside your alternate storage site agreements. Your alternate processing site agreements should reflect the same synchronization requirements.

Step 5 — Test independently. Validate that each distributed component can operate independently during a partial outage or compromise. Run tabletop exercises that simulate an attacker gaining access to one location and verify that the remaining locations detect anomalous cross-boundary access attempts.

For your vendors

When evaluating whether a vendor has implemented SC-36, focus on evidence that their architecture creates genuine independence between processing and storage boundaries, not just geographic redundancy on the same platform.

Step 1 — Request architecture documentation. Ask for system architecture diagrams that show how processing and storage components are distributed. Look for evidence of independent authentication boundaries between locations, not just load-balanced replicas behind a single access layer.

Step 2 — Evaluate distribution independence. A vendor running three database replicas in the same availability zone behind the same IAM policies hasn’t implemented SC-36 in a meaningful way. Look for separate administrative domains, independent credential stores, and distinct monitoring infrastructure at each location.

Step 3 — Review processing site and storage site agreements. Request copies of agreements that govern each distributed location. These documents should define roles, responsibilities, and security requirements for each site, as well as procedures for handling a compromise at one location without impacting the others.

Step 4 — Verify logging independence. Ask how the vendor ensures that an attacker who compromises one processing or storage location can’t tamper with logs at the other locations. Independent log stores with separate access controls are a key indicator of genuine distribution.

Step 5 — Assess contingency integration. Verify that the vendor’s distributed architecture integrates with their contingency planning. Distribution without tested failover procedures creates complexity without resilience.

Evidence examples

Cross-framework mapping

No cross-framework mappings are currently configured for SC-36.

Related controls

• CP-06 — Alternate Storage Site: Provides the physical or logical alternate location where storage components can be maintained, directly supporting SC-36’s requirement to distribute storage across independent sites
• CP-07 — Alternate Processing Site: Provides the alternate location for processing operations, enabling the geographic or logical distribution of processing that SC-36 requires
• PL-08 — Security and Privacy Architectures: Defines the architectural framework within which distribution decisions are made, ensuring that distributed components maintain consistent security properties
• SC-32 — System Partitioning: Complements SC-36 by dividing system components into separate physical or logical partitions, reinforcing the independence of boundaries that distribution creates

Frequently asked questions

What is NIST SP 800-53 SC-36

SC-36 requires organizations to distribute processing components and storage components across multiple physical locations or logical domains to increase the work factor for adversaries attempting to compromise or exfiltrate a complete dataset. This control exists within the System and Communications Protection family of NIST SP 800-53 Revision 5. It applies at the organization level and is relevant to both first-party security programs and third-party risk assessments. The control doesn’t mandate a specific number of locations. Instead, it requires that each distributed boundary maintain independent authentication and monitoring to create genuine resilience.

What happens if SC-36 is not implemented

Without SC-36, organizations concentrate processing components and storage components in a single location or domain under the NIST SP 800-53 framework, creating a centralized target that an attacker can fully compromise through a single breach. Automated collection tools can sweep and stage an entire dataset from one access point, and a single set of event logs can be cleared to erase evidence. The damage ceiling of any intrusion remains uncapped because there are no independent boundaries forcing the attacker to repeat their effort across multiple systems.

How do you audit SC-36

Auditing SC-36 starts with verifying that processing components and storage components are deployed across distinct physical locations or logical domains, each with independent authentication boundaries and separate logging infrastructure. Review system architecture diagrams to confirm that distribution creates genuine independence, then examine configuration settings and site agreements for evidence that each boundary maintains its own access controls. Test whether compromising one location’s credentials or clearing one location’s logs would leave the other locations’ monitoring and access controls intact.

What is the difference between distributed processing and alternate processing sites

Distributed processing under SC-36 spreads processing components across multiple locations or logical domains during normal operations, with all sites actively handling workloads in parallel. Alternate processing sites under CP-07 are standby locations that activate only during a disruption or contingency event. SC-36 focuses on increasing the attacker’s work factor by requiring multiple independent compromises, while CP-07 focuses on continuity of operations when a primary site becomes unavailable. Many organizations implement both controls together, using distributed processing as the baseline architecture and alternate sites as the failover layer.