# IA-04 Identifier Management

NIST SP 800-53 control. Family: IA Identification and Authentication. Function: preventative. Baselines: low, moderate, high. Mapping licence: CC BY-SA 4.0.

Statement: Manage system identifiers by: a. Receiving authorization from [Assignment: organization-defined personnel or roles] to assign an individual, group, role, service, or device identifier; b. Selecting an identifier that identifies an individual, group, role, service, or device; c. Assigning the identifier to the intended individual, group, role, service, or device; and d. Preventing reuse of identifiers for [Assignment: organization-defined time period].
Guidance: 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-02 use account names provided by IA-04. 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.

## Enhancements (6)
- IA-04(01) Prohibit Account Identifiers as Public Identifiers
- IA-04(04) Identify User Status. Baselines: moderate, high
- IA-04(05) Dynamic Management
- IA-04(06) Cross-organization Management
- IA-04(08) Pairwise Pseudonymous Identifiers
- IA-04(09) Attribute Maintenance and Protection
Withdrawn by NIST: IA-04(02) (now in IA-12(01)); IA-04(03) (now in IA-12(02)); IA-04(07) (now in IA-12(04)).
Each enhancement's statement: /api/v1/controls/IA-04?fields=enhancements

## Patterns that use it (13)
- Critical (3): SP-032 Modern Authentication; SP-044 SaaS Identity Lifecycle Management; SP-052 Decentralised Identity & Verifiable Credentials (draft)
- Important (9): SP-019 Secure Ad-Hoc File Exchange Pattern; SP-021 Realtime Collaboration Pattern; SP-022 Board of Directors Room; SP-029 Zero Trust Architecture; SP-030 API Security; SP-033 Passkey Authentication; SP-037 Privileged User Management; SP-047 Secure Agentic AI Frameworks; SP-051 Tokenised Asset Security Architecture (draft)
- Standard (1): SP-028 Secure DevOps Pipeline Pattern

## Clauses by framework (62 frameworks)
- iso_27001_2022: A.5.16
- iso_27002_2022: 5.16
- cobit_2019: DSS05
- pci_dss_v4: 8.2
- nist_csf_2: PR.AA-01, PR.AA-02. OSA's own, not in NIST's crosswalk: PR.AA-02
- cis_controls_v8: CIS 5, CIS 5.5, CIS 6.6
- soc2_tsc: CC6.1, CC6.1-POF3, CC6.1-POF4, CC6.6, CC6.6-POF2, CC6.6-POF3
- finos_ccc: CCC-C11
- mas_trm: 9
- bsi_grundschutz: ORP.4
- anssi: Hygiene.6, Hygiene.7, Hygiene.11, Hygiene.32, SecNumCloud.10.2
- osfi_b13: B-13.3.2
- finma_circular: IV.B.d(59), IV.B.d(60)
- gdpr: Art.5(1)(f), Art.32(1)(b)
- dora: Art.9(4)(c), Art.9(4)(d)
- bio2: 5.16
- rbi_csf: Annex1.8, ITGRCA.19
- fisc: FISC.T2
- hkma_tme1: TME1.8.1
- mlps_2: 8.1.4.1
- dnb_good_practice: DNB.17.1, DNB.17.2
- cra: CRA.I.2d
- cbb_tm: TM-6
- cbuae: CR-4
- nca_ecc: 2-2
- qatar_nia: AC
- sama_csf: 3.1
- uae_ia: T9
- bog_cisd: CISD-VIII
- bom_ctrm: 3.3
- cbe_csf: CTO-1
- cbn_csf: Part3.2
- popia: s19
- sa_js2: JS2-7.1
- bot_cyber: Ch2.2
- cpmi_pfmi: CG.PR
- eba_ict: 3.4.2
- ecb_croe: CROE.2.3.1
- ffiec_is: II.C.7(b), II.C.15
- hipaa_sr: §164.308(a)(3)(ii)(C), §164.308(a)(4)(ii)(C), §164.308(a)(5)(ii)(D), §164.312(a)(2)(i), §164.312(d)
- iosco_cyber: PROT-1
- nydfs_500: 500.7
- sebi_cscrf: PR.AA
- cmmc_2: AC, IA
- doe_c2m2: ACCESS
- iaea_nss: Sec 5.2
- common_criteria: CC Part 2 — FIA
- isae_3402: Clause 4
- fca_sysc_13: SYSC 13.7.3
- fda_21_cfr_11: §11.10(d), §11.100(a), §11.100(b), §11.200(a)(2), §11.300(a), §11.300(c)
- fda_cyber: SA-1
- hitrust_csf: 01.a, 02.c
- iso_27799: 7.3, 9.3
- lloyds_ms: MS8.3
- naic_ds: 4-access, 4B
- nhs_dspt: NDG-4.1, NDG-4.2
- pra_ss1_23: P-IT.1
- solvency_ii: EIOPA-ICT-4.4
- csa_ccm_v4: IAM-03, IAM-06, IAM-13
- csa_aicm: IAM-03, IAM-06, IAM-13
- mica: Art.63(2)
- basel_sco60: SCO60.62
OSA's mapping for iso_27001_2022 and nist_csf_2 takes NIST's published crosswalk as its base. A clause not marked as OSA's own is in that crosswalk.

## More
- This control as JSON, with guidance and ATT&CK techniques: /api/v1/controls/IA-04
- Clauses only: /api/v1/controls/IA-04?fields=mappings
- Page for people: /controls/ia-04/