NIST 800-171
U.S. standard protecting CUI in nonfederal systems
FedRAMP
U.S. program standardizing cloud security for federal agencies
Quick Verdict
NIST 800-171 safeguards CUI in nonfederal contractor systems via DFARS contracts, while FedRAMP authorizes cloud services for federal use through standardized 3PAO assessments. Contractors adopt 800-171 for DoD eligibility; CSPs pursue FedRAMP for agency procurement access.
NIST 800-171
NIST SP 800-171r3: Protecting CUI in Nonfederal Systems
Key Features
- Tailored SP 800-53 controls for nonfederal CUI protection
- Mandates SSP and POA&M documentation artifacts
- Scoped CUI enclave isolation with boundary controls
- Contract-enforced via DFARS 252.204-7012 clause
- r3 adds supply chain and planning families
FedRAMP
Federal Risk and Authorization Management Program
Key Features
- Assess once, use many times reusability model
- NIST 800-53 Rev 5 controls at three impact levels
- Independent 3PAO security assessments required
- Continuous monitoring with monthly deliverables
- FedRAMP Marketplace for authorized CSP listings
Detailed Analysis
A comprehensive look at the specific requirements, scope, and impact of each standard.
NIST 800-171 Details
What It Is
NIST SP 800-171r3 is a U.S. government framework providing security requirements to protect Controlled Unclassified Information (CUI) confidentiality in nonfederal systems. Tailored from SP 800-53 Moderate baseline, it applies to contractors via contracts like DFARS 252.204-7012, using a control-based, scoped approach.
Key Components
- 97 requirements across 17 families (r3), including Access Control, Audit, new Supply Chain Risk Management.
- SSP describes implementation; POA&M tracks remediation.
- SP 800-171A r3 for examine/interview/test assessments.
- Built on FIPS 200, supports tailoring and cloud equivalency.
Why Organizations Use It
- Meets DoD contractual mandates for CUI handling.
- Enables CMMC Level 2 certification, procurement eligibility.
- Reduces breach risks, builds supply chain trust.
- Strategic for federal contractors seeking competitive edge.
Implementation Overview
Phased: scope CUI enclave, gap analysis, implement controls (MFA, SIEM), document SSP/POA&M. Applies to contractors globally; self or third-party assessments. High complexity for mid-large firms, 12-18 months typical.
FedRAMP Details
What It Is
FedRAMP (Federal Risk and Authorization Management Program) is a U.S. government-wide framework standardizing security assessment, authorization, and continuous monitoring for cloud services used by federal agencies. Its primary purpose is enabling "assess once, use many times" to reduce duplication, based on NIST SP 800-53 Rev 5 controls tailored to FIPS 199 impact levels (Low, Moderate, High).
Key Components
- Baselines with ~156 (Low), ~323 (Moderate), ~410 (High) controls, plus LI-SaaS variant.
- Core artifacts: SSP, SAR, POA&M, continuous monitoring plans.
- Built on NIST standards; compliance via 3PAO assessments and agency/program authorizations.
Why Organizations Use It
- Unlocks federal contracts (e.g., $20M+ opportunities) and CMMC compliance.
- Demonstrates robust security for commercial differentiation.
- Mitigates risks via standardized, reusable assessments.
- Builds stakeholder trust in cloud providers.
Implementation Overview
- Phased: preparation, assessment, authorization, monitoring (12-18 months typical).
- Involves gap analysis, documentation, 3PAO audits; suits CSPs targeting U.S. federal market.
- High costs ($150k-$2M+); requires specialized teams.
Key Differences
| Aspect | NIST 800-171 | FedRAMP |
|---|---|---|
| Scope | CUI protection in nonfederal systems | Cloud service security assessments |
| Industry | DoD contractors, federal supply chains | Cloud providers serving federal agencies |
| Nature | Contractual requirements via DFARS | Government-wide authorization program |
| Testing | Self/third-party assessments, CMMC | 3PAO independent assessments, annual |
| Penalties | Contract loss, CMMC ineligibility | Marketplace delisting, no federal sales |
Scope
Industry
Nature
Testing
Penalties
Frequently Asked Questions
Common questions about NIST 800-171 and FedRAMP
NIST 800-171 FAQ
FedRAMP FAQ
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