The Audit Defense Library

Practitioner-depth analysis across federal and private compliance: FISMA and NIST RMF, FedRAMP, CMMC, federal AI governance, SOC 2, AI governance, cybersecurity, and GRC engineering. Written by a CPA, CISSP, CISA with Big 4 audit experience.

All FISMA & NIST RMF FedRAMP CMMC Federal AI Governance GovCon Compliance Federal Cybersecurity Federal Zero Trust Federal GRC Engineering AI Governance GRC Engineering Cybersecurity Cloud Security HIPAA SOC 2
Federal AI Governance

OMB M-25-21 Compliance Guide: The New Federal AI Governance Framework

Editor's Note (Updated August 30, 2026): Both of the deadlines in this article have passed. OMB M-25-21 was issued April 3, 2025, so the 180-day AI Strategy and compliance-plan deadline fell on September 30, 2025...

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CMMC

CMMC Level 2 Assessment Preparation: The 90-Day Readiness Sprint

Updated July 30, 2026: On July 13, 2026 the Department of War suspended CMMC Phase II, which had been scheduled for November 10, 2026. Phase I self-assessment requirements, DFARS 252.204-7012, NIST SP 800-171 Rev 2,...

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DCAA Audit Readiness

FAR Part 31 Allowable Costs: The Definitive Guide for Government Contractors

The notification arrived on a Tuesday. A Defense Contract Audit Agency (DCAA) auditor was on-site, reviewing overhead pool charges for the prior fiscal year. By Wednesday afternoon, the auditor had flagged $47,000 in entertainment expenses...

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Federal GRC Engineering

OSCAL Explained: The Machine-Readable Compliance Standard Reshaping Federal GRC

Federal compliance documentation practice has not changed materially in twenty years: security professionals write System Security Plans (SSPs) by hand, auditors read them by eye, and agencies process authorization packages the same way they processed...

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CMMC

SPRS Score Explained: How to Calculate and Improve Your DoD Compliance Score

What is your Supplier Performance Risk System (SPRS) score right now? Not the score you submitted. The score that reflects your actual implementation status today, measured against the 110 controls in NIST SP 800-171 Rev...

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CMMC

CMMC Enclave Architecture: Scoping Your CUI Environment to Minimize Assessment Cost

The following is an illustrative composite drawn from current CMMC assessment market conditions. Contractor A had 340 workstations, four office locations, a shared IT environment spanning HR, finance, and engineering, and a standard enterprise network...

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FedRAMP

FedRAMP 20x: What Changes for Cloud Service Providers in 2026

FedRAMP has been running essentially the same authorization process for fifteen years. Cloud service providers submit narrative security packages, assessors review documentation, the Program Management Office (PMO) validates controls, and an agency issues an Authorization...

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FedRAMP

RFC-0024 Machine-Readable Compliance: FedRAMP’s Phased OSCAL Deadline Guide

In 2025, FedRAMP processed more than 100 Rev5 authorizations without a single Open Security Controls Assessment Language (OSCAL) submission, a figure RFC-0024 itself cites in its background section to justify its proposed machine-readable requirements (FedRAMP...

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FISMA & NIST RMF

NIST RMF Step-by-Step: The 7-Step Implementation Guide for Federal Systems

Every federal agency that failed an authorization review in the past three years has something in common. The finding is rarely about a missing firewall rule or an unpatched server. The finding is about a...

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FISMA & NIST RMF

NIST 800-171 Rev 2 vs Rev 3: What Defense Contractors Need to Know

Two defense contractors received the same Cybersecurity Maturity Model Certification (CMMC) Level 2 notice in Q1 2026. The first pulled up NIST SP 800-171 Rev 2, confirmed their 110-control gap analysis, and started booking Certified...

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AI Governance

AI Literacy Training Requirements: What the EU AI Act Article 4 Demands from Every Organization

The EU AI Act covers 450 million people and governs every organization that deploys AI systems touching EU residents. Most compliance teams know about the high-risk system obligations, the conformity assessments, the technical documentation requirements....

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Cybersecurity

PCI DSS 4.0 Compliance Requirements: The 12 Requirements Rebuilt for 2026

The QSA flagged it on day two of the on-site assessment. A payment page was loading three JavaScript files from external CDNs that had no inventory entry, no integrity hash, and no authorization record. The...

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The Authority Brief

One compliance analysis per week from Josef Kamara, CPA, CISSP, CISA. Federal and private compliance, written for practitioners.