CMMC
DoD framework certifying cybersecurity for FCI and CUI
NIST 800-171
U.S. standard for protecting CUI in nonfederal systems
Quick Verdict
CMMC certifies DoD contractors' cybersecurity maturity via tiered assessments for FCI/CUI, while NIST 800-171 provides the 110-control baseline it implements. Organizations pursue CMMC for contract eligibility; NIST 800-171 ensures foundational CUI protection across federal supply chains.
CMMC
Cybersecurity Maturity Model Certification (CMMC) 2.0
Key Features
- Three tiered levels escalating from self-assessment to DIBCAC
- Direct mapping to NIST SP 800-171/172 without additions
- Independent C3PAO third-party verifications for Level 2
- Mandatory flow-down across DIB supply chains
- Enclave scoping for targeted FCI/CUI protection
NIST 800-171
NIST SP 800-171 Protecting CUI in Nonfederal Systems
Key Features
- Protects CUI confidentiality in nonfederal contractor systems
- 97 requirements across 17 control families in Rev 3
- Requires SSP and POA&M for implementation documentation
- Supports CUI enclave scoping to limit compliance scope
- DFARS-mandated for DoD contractors with incident reporting
Detailed Analysis
A comprehensive look at the specific requirements, scope, and impact of each standard.
CMMC Details
What It Is
Cybersecurity Maturity Model Certification (CMMC) 2.0 is a DoD certification program verifying cybersecurity protections for Federal Contract Information (FCI) and Controlled Unclassified Information (CUI) across the Defense Industrial Base (DIB). It employs a tiered, cumulative model with three levels, drawing from FAR 52.204-21, NIST SP 800-171 Rev 2, and NIST SP 800-172 for risk-aligned assurance.
Key Components
- **LevelsLevel 1 (17 basic FAR practices), Level 2 (110 NIST 800-171 controls), Level 3 (+24 NIST 800-172 enhancements).
- 14 domains (e.g., Access Control, Incident Response) with practices assessed via interview, examine, test.
- Built on NIST frameworks; certification valid 3 years with annual affirmations in SPRS/eMASS; limited POA&Ms (180-day closure).
Why Organizations Use It
- Mandatory for DoD contracts, ensuring eligibility and flow-down compliance.
- Mitigates IP theft, supply chain risks; boosts resilience, reduces incidents.
- Provides competitive edge, primes prefer certified subs; builds stakeholder trust.
Implementation Overview
- **PhasedGovernance, scoping/gaps, remediation, assessment (self/C3PAO/DIBCAC), sustainment.
- Applies to all DIB firms handling FCI/CUI; enclave scoping aids SMEs.
- Key: SSP development, evidence collection; triennial audits for Levels 2/3.
NIST 800-171 Details
What It Is
NIST SP 800-171, Protecting Controlled Unclassified Information in Nonfederal Systems and Organizations, is a U.S. government framework providing security requirements for safeguarding CUI confidentiality. It targets nonfederal entities like contractors, using a control-based approach tailored from NIST SP 800-53 Moderate baseline, focusing on systems processing, storing, or transmitting CUI.
Key Components
- 17 families in Rev 3 (97 requirements), expanded from 14 in Rev 2, including new areas like Planning (PL), Supply Chain Risk Management (SR).
- Core elements: SSP, POA&M, assessment procedures via SP 800-171A.
- Built on FIPS 200 and SP 800-53; supports tailoring and ODPs.
- Compliance via self-assessment or third-party (e.g., CMMC Level 2).
Why Organizations Use It
- Mandatory for federal contractors via DFARS 252.204-7012.
- Reduces breach risk, ensures contract eligibility, builds supply chain trust.
- Strategic benefits: market access, resilience, FedRAMP equivalence.
Implementation Overview
Phased: scoping CUI enclave, gap analysis, control deployment (MFA, SIEM), documentation. Applies to contractors handling CUI; audits via examine/interview/test. (178 words)
Key Differences
| Aspect | CMMC | NIST 800-171 |
|---|---|---|
| Scope | Tiered certification levels for FCI/CUI with 171 practices across 14 domains | 110 requirements across 14 families for CUI confidentiality protection |
| Industry | DoD Defense Industrial Base contractors/subcontractors | All nonfederal organizations handling federal CUI |
| Nature | Mandatory DoD certification program with assessments | NIST baseline standard enforced via contracts |
| Testing | Self-assess Level 1/2 or C3PAO/DIBCAC every 3 years | Examine/interview/test per SP 800-171A procedures |
| Penalties | Contract ineligibility without certification | Contractual remedies, audits, potential debarment |
Scope
Industry
Nature
Testing
Penalties
Frequently Asked Questions
Common questions about CMMC and NIST 800-171
CMMC FAQ
NIST 800-171 FAQ
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