Revision confusion
NIST’s current publication and the revision incorporated by a specific contract or program may not always be the same.
NIST SP 800-171 Readiness
Protect Controlled Unclassified Information with a defined, evidence-based security program.
NIST SP 800-171 provides security requirements for protecting the confidentiality of CUI in nonfederal systems and organizations. Citadel Networks helps contractors understand scope, assess the applicable revision, implement requirements, and organize evidence.
CUI protection depends on scope, system design, process discipline, and evidence.
Organizations must know where CUI exists, which systems and people are in scope, how security requirements are implemented, and how those implementations can be demonstrated.
Boundary sprawl
CUI can move through email, endpoints, cloud services, vendors, remote access, backups, and shared systems.
Evidence weakness
A control can appear implemented until an assessment asks for repeatable proof, ownership, and supporting records.
Requirement-driven implementation
Follow the controlling requirement and build a defensible system security plan.
We help determine the applicable requirement with the appropriate stakeholders, define the environment, assess implementation, and manage remediation and documentation.
- Contract and revision confirmation support
- CUI flow and system-boundary mapping
- Requirement gap assessment
- System Security Plan development
- Remediation roadmap and project coordination
- Assessment evidence preparation
Support can include
- CUI data-flow and scope workshops
- Asset inventory and network diagrams
- Gap assessment against the applicable revision
- System Security Plan development or update
- Plan of Action and Milestones tracking when permitted
- Policy and procedure development
- Technical safeguard implementation
- Evidence matrix and documentation repository structure
- Readiness review using applicable assessment procedures
- Coordination with legal, contracting, and assessment professionals
The Citadel Networks Method™
A continuous approach to understanding risk, protecting what matters, adapting to change, and strengthening your business over time.
Discover Defend Adapt Strengthen Discover
Discover
Understand Your Business
We start by understanding the organization, goals, technology, regulatory obligations, and risks.
Outcome: Know where you stand and what matters most.
Defend
Protect What Matters
We implement practical cybersecurity controls, compliance safeguards, and secure technology practices around people, systems, data, and operations.
Outcome: Reduce risk without creating unnecessary complexity.
Adapt
Respond to Change
Cyber threats evolve, regulations change, businesses grow, and AI introduces new opportunities and risks. We continuously reassess and adjust the security program as the environment changes.
Outcome: Stay prepared instead of becoming outdated.
Strengthen
Build Long-Term Resilience
We improve security maturity, strengthen governance, close gaps, and prepare the organization for what comes next.
Outcome: Become a stronger, more resilient business over time.
What leaders often ask before getting started
Do we automatically need NIST SP 800-171 if we work with the federal government?
Not every contract has the same information or clauses. Applicability depends on the contract, the data involved, and the governing requirements.
What is the difference between NIST 800-171 and CMMC?
NIST SP 800-171 defines security requirements for protecting CUI in nonfederal environments. CMMC is a DoD program that uses specified safeguarding requirements and assessment mechanisms to verify implementation for applicable contracts.
Can Citadel Networks perform the official assessment?
We provide readiness, implementation, and evidence support. Formal assessments must be performed by the organization or authorized assessors as required by the governing program.
Review NIST SP 800-171 Revision 3
NIST SP 800-171 Revision 3 is the current NIST publication, while CMMC regulations currently incorporate Revision 2 for CMMC Level 2. Contracts and program requirements control. Confirm the applicable revision before designing or assessing the environment.
Take the next step
Schedule a NIST 800-171 Conversation
Define the CUI environment and build a defensible implementation.
Start with the contract, the applicable revision, and a clear understanding of where CUI moves through the business.