| name | IA-4_identifier-management |
| description | Manage system identifiers by: Receiving authorization from [organization-defined] to assign an individual, group, role, service, or device identifier; |
| category | authentication |
| version | 5.2.0 |
| author | cyberstrike-official |
| tags | ["nist","sp800-53","rev5","ia-4","ia"] |
| tech_stack | ["aws","azure","active-directory","linux","windows"] |
| cwe_ids | ["CWE-287"] |
| chains_with | ["AC-5","IA-2","IA-3","IA-5","IA-8","IA-9","IA-12","MA-4","PE-2","PE-3"] |
| prerequisites | [] |
| severity_boost | {"AC-5":"Chain with AC-5 for comprehensive security coverage","IA-2":"Chain with IA-2 for comprehensive security coverage","IA-3":"Chain with IA-3 for comprehensive security coverage"} |
IA-4 Identifier Management
High-Level Description
Family: Identification and Authentication (IA)
Framework: NIST SP 800-53 Rev 5
Common device identifiers include Media Access Control (MAC) addresses, Internet Protocol (IP) addresses, or device-unique token identifiers. The management of individual identifiers is not applicable to shared system accounts. Typically, individual identifiers are the usernames of the system accounts assigned to those individuals. In such instances, the account management activities of AC-2 use account names provided by IA-4 . Identifier management also addresses individual identifiers not necessarily associated with system accounts. Preventing the reuse of identifiers implies preventing the assignment of previously used individual, group, role, service, or device identifiers to different individuals, groups, roles, services, or devices.
What to Check
How to Test
Step 1: Review Documentation
Examine the System Security Plan (SSP) and related artifacts for IA-4 implementation details. Verify the organization has documented how this control is satisfied.
Step 2: Validate Implementation
# For cloud environments, use cloud-audit-mcp tools
# For on-premises, review system configurations directly
# Example: Check if account management policies exist
grep -r "account.management\|access.control" /etc/security/ 2>/dev/null
Step 3: Test Operating Effectiveness
Verify the control is actively functioning, not just documented. Check logs, configurations, and operational evidence.
Tools
| Tool | Purpose | Usage |
|---|
| cloud-audit-mcp | Check authentication settings | cloud_audit_iam_policies |
| hackbrowser-mcp | Test authentication mechanisms | browser_auth_test |
Remediation Guide
Control Statement
Manage system identifiers by:
Receiving authorization from [organization-defined] to assign an individual, group, role, service, or device identifier;
Selecting an identifier that identifies an individual, group, role, service, or device;
Assigning the identifier to the intended individual, group, role, service, or device; and
Preventing reuse of identifiers for [organization-defined].
