If your organization handles Controlled Unclassified Information (CUI), you’ve likely heard about FIPS 140-2. You may have seen vendors promising “FIPS-validated encryption,” auditors asking whether your systems use FIPS modules, or assessors flagging encryption gaps in NIST 800-171 environments.
But what does FIPS really require — and how does it impact your CMMC readiness?
At CMMC IT Support, our San Diego-based consultancy helps Department of Defense (DoD) contractors and subcontractors achieve and maintain CMMC Level 2 compliance. One of the most common problem areas we see during readiness reviews is misunderstanding what FIPS means and how to implement it correctly.
This guide breaks down FIPS in plain English so your team can make smart, defensible security decisions — and avoid costly compliance gaps.
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What is FIPS? (And What FIPS Means for Defense Contractors)
FIPS means Federal Information Processing Standards.
These are cybersecurity standards created by the National Institute of Standards and Technology (NIST) so that federal agencies — and the companies that work with them — protect sensitive data consistently.
In other words:
FIPS is a federally approved way to ensure encryption tools meet strict, independently tested security expectations.
When your environment touches CUI, FIPS isn’t optional. It becomes part of your legal and contractual responsibility.
What is FIPS Encryption?
When we talk about FIPS encryption, we’re referring to cryptographic modules that have been tested and validated under the Cryptographic Module Validation Program (CMVP).
Here’s the key distinction:
- ❌ “We use strong encryption” — not enough
- ❌ “We use AES-256” — still not enough
- ✔️ “Our encryption module is FIPS 140-2 validated by NIST” — meets the requirement
FIPS validation proves that:
- Algorithms are implemented correctly
- Encryption modules pass rigorous testing
- Self-tests, key handling, and error handling follow strict rules
- Documentation and operation align with NIST standards
This matters because even strong encryption can be implemented incorrectly — leading to vulnerabilities assessors will flag.
What is FIPS 140-2?
FIPS 140-2 is the specific standard that governs how cryptographic modules must be designed, tested, validated, and used.
It covers things like:
- Key generation and storage
- Algorithm implementation
- Physical module protections
- Random number generation (entropy)
- Self-testing and failure responses
- Secure roles and services
- Module integrity
And most importantly:
If encryption protects CUI anywhere in your environment, the encryption modules must be FIPS 140-2 validated — not simply “FIPS-compatible.”
This includes:
- Laptops and desktops
- Servers
- Cloud storage and collaboration tools
- Email encryption platforms
- Mobile devices
- File sharing solutions
- Backup systems
- VPN / remote access
If it encrypts CUI — it must use FIPS-validated cryptography.
FIPS Compliance and NIST 800-171 (And Why Assessors Care)
All DoD contractors handling CUI are required to comply with:
- DFARS 252.204-7012
- NIST SP 800-171
- Eventually CMMC Level 2
Inside NIST 800-171, control 3.13.11 specifically states:
Employ FIPS-validated cryptography when using cryptography to protect the confidentiality of CUI.
Multiple other controls reference cryptography for:
- Protecting CUI in transit
- Remote access security
- Session encryption
- Data protection on endpoints
That means encryption gaps quickly cascade across multiple control failures.
And assessors know it.
In fact, failure to meet FIPS 140-2 is one of the most common “not met” findings during Joint Surveillance Voluntary Assessments (JSVAs) and NIST score reviews.
How to Know if Your Vendor Uses Real FIPS 140-2 Encryption
Many vendors claim:
“We follow FIPS standards”
“FIPS Inside”
“FIPS-ready encryption”
But unless they appear in the official NIST CMVP Validated Modules Database, they are not FIPS validated.
You should be able to:
- Ask for their CMVP certificate
- Look up their module directly in the NIST database
- Confirm version numbers match your deployed solution
If they can’t provide proof — assume it is not compliant.
“FIPS Inside” vs Actual FIPS Validation
Here’s the trap many contractors fall into:
Some software vendors use FIPS-approved algorithms (like AES) but never actually get their module validated.
This creates risk because:
- Implementation flaws may exist
- Entropy and randomness may be weak
- Key storage might be insecure
- Error and failure responses may be unsafe
- Self-testing may not occur properly
Without independent validation, you simply cannot prove compliance — and auditors won’t take “trust us” as an answer.
Why FIPS Matters for CMMC Level 2
CMMC Level 2 aligns directly to NIST 800-171.
So if your encryption is not FIPS validated:
- You risk failing assessments
- You may be forced into expensive remediation
- You could lose your contract eligibility
- Your organization may face breach exposure
On the other hand, when FIPS encryption is implemented correctly:
✔️ Assessments move faster
✔️ Documentation is easier
✔️ Your environment becomes more defensible
✔️ You significantly reduce cyber risk
And that’s exactly what we help organizations achieve.
How CMMC IT Support Helps Contractors Implement FIPS-Validated Solutions
At CMMC IT Support, we work daily with small and mid-size defense contractors nationwide.
Our team helps you:
- Identify where CUI actually lives
- Map which systems require FIPS encryption
- Validate vendor claims and certificates
- Replace non-compliant tools with secure alternatives
- Document cryptographic implementations properly
- Prepare for NIST and CMMC audits with confidence
We take something that feels overwhelming — and make it manageable.
Ready to Simplify FIPS Compliance?
If you’re unsure whether your tools truly meet FIPS 140-2, don’t wait until an assessor tells you the bad news.
Let’s review your environment together.
👉 Schedule a free compliance call or request a quote:
🔗 https://www.cmmcitsupport.us/contact-us/
📞 858-483-8770
📧 info@cmmcitsupport.us
We’ll help you understand exactly where you stand — and what to do next.
Frequently Asked Questions About FIPS (Quick Answers)
What is FIPS?
FIPS means Federal Information Processing Standards, which define how encryption must be implemented to protect sensitive U.S. government data.
What is FIPS encryption?
Encryption that has been tested, validated, and listed by NIST under FIPS 140-2 or newer.
Is FIPS required for CMMC?
Yes — because NIST 800-171 requires FIPS-validated encryption when protecting CUI.
Is AES-256 automatically FIPS?
No. AES-256 must run inside a validated cryptographic module to meet FIPS requirements.
How do I know if my software is FIPS-validated?
Ask for the vendor’s CMVP certificate and confirm it in the NIST database.
Final Word: FIPS Isn’t Just Technical — It’s Contractual Protection
As a defense contractor, FIPS compliance protects your business, your contracts, and the sensitive data entrusted to you.
And with the right guidance, it doesn’t have to be complicated.
CMMC IT Support is here to help you:
- Implement the right tools
- Avoid costly mistakes
- Protect your contract eligibility
- Move toward secure, documented, auditable compliance
Start with a quick conversation today. We’re here to support you every step of the way.
👉 https://www.cmmcitsupport.us/contact-us/
📞 858-483-8770
📧 info@cmmcitsupport.us
