FIPS 140-3 Validated Cryptography: What FedRAMP Requires

What “FIPS-Validated” Means

Using “FIPS-compliant algorithms” in software is not the same as running a CMVP-validated module in an approved mode. FedRAMP assessors look for validated modules (and correct configuration) for cryptography protecting federal data in the authorization boundary.

140-3 vs 140-2

• 140-3 — preferred for new designs and refreshes
• 140-2 — may still appear for inherited platforms or transition windows; track sunset / migration guidance

CSP Actions

• Inventory TLS terminators, disk encryption, VPN, HSM/KMS, and libraries in scope
• Map each to a CMVP certificate and validated version
• Document approved modes and key management in the SSP
• Treat crypto module swaps as potential significant changes

How CyberSilo Helps

• Evidence workflows for SSP, POA&M, and control status via Compliance Standards Automation
• ThreatHawk SIEM for AU-family logging, ConMon telemetry, and investigation evidence
• Advisory scoping for readiness, baseline selection, and agency-path planning — contact CyberSilo

Frequently Asked Questions

Is AES-256 enough to claim FIPS?

No. Algorithm choice is necessary but not sufficient — FedRAMP expects validated modules used in approved modes.

Can we list a certificate our hyperscaler uses?

Only where inheritance is accurate. Document what you inherit vs what you configure in your boundary.

Does 20x remove FIPS expectations?

Modernization changes validation mechanics; cryptographic module expectations remain a core federal security theme — verify current FedRAMP crypto guidance for your class.

Related FedRAMP Resources

SSP · Checklist · 3PAO · Hub