Replay-Resistant Authentication (03.05.04)_replay-resistant-authentication

Replay-Resistant Authentication (03.05.04) Replay-Resistant Authentication

High-Level Description

Family: Identification and Authentication Framework: NIST SP 800-171 Rev 3 Applicability: Systems processing, storing, or transmitting CUI

Replay-Resistant Authentication

What to Check

• Verify Replay-Resistant Authentication (03.05.04) Replay-Resistant Authentication is implemented for CUI systems
• Review SSP documentation for Replay-Resistant Authentication (03.05.04)
• Validate CMMC Level 2 assessment objective for Replay-Resistant Authentication (03.05.04)
• Confirm POA&M addresses any gaps for Replay-Resistant Authentication (03.05.04)

How to Test

Step 1: Review System Security Plan

Examine the SSP for Replay-Resistant Authentication (03.05.04) implementation description and responsible parties.

Step 2: Assess Implementation

# Verify security controls protecting CUI
# Check access controls, encryption, monitoring as applicable

# For Linux systems:
ls -la /etc/security/ 2>/dev/null
grep -r "CUI\|controlled" /etc/security/ 2>/dev/null

# For cloud:
# Use cloud-audit-mcp tools to assess posture

Step 3: CMMC Assessment Validation

Verify this requirement passes CMMC Level 2 assessment methodology per SP 800-171A Rev 3.

Tools

Remediation Guide

Requirement Statement

Implement Replay-Resistant Authentication per NIST SP 800-171 Rev 3.

Supplemental Guidance

Authentication processes resist replay attacks if it is impractical to successfully authenticate by recording or replaying previous authentication messages. Replay-resistant techniques include protocols that use nonces or challenges, such as time synchronous or challenge-response one-time authenticators.

Risk Assessment

CWE Categories

References

• NIST SP 800-171 Rev 3
• NIST SP 800-171A Rev 3 (Assessment)
• CMMC Model Overview
• NIST OSCAL Content

Checklist

• SSP documents Replay-Resistant Authentication (03.05.04) implementation
• Evidence of operating effectiveness collected
• POA&M addresses any gaps
• CMMC assessment objective met
• Continuous monitoring active