NIST SP 800-53 Rev. 5 IA-5(10) — Dynamic Credential Binding

What this control requires

Control mandates binding identities and authenticators dynamically using organization-defined rules, enabling authentication without pre-provisioning by leveraging external mechanisms like smartcards and pre-established trust relationships. This control supports the IAM capability within the Identification and Authentication family.

In plain English

Control mandates binding identities and authenticators dynamically using organization-defined rules, enabling authentication without pre-provisioning by leveraging external mechanisms like smartcards and pre-established trust relationships. In practice, this means you can prove you dynamic management-level controls on a defined cadence.

Why it matters

SP 800-53 is the catalogue every U.S. federal authorisation (FedRAMP, FISMA, CMMC) and most regulated industries point at. A missing control surfaces as a Plan of Action & Milestones (POA&M) item that an Authorizing Official must approve before the Authority To Operate is granted or renewed.

What an auditor looks for

A 3PAO (FedRAMP) or Independent Assessor (NIST RMF) tests against NIST SP 800-53A assessment procedures. For each control they expect a documented implementation that addresses every assessment objective (Examine, Interview, Test) and an implementation summary in the System Security Plan.

Within Identification and Authentication, the assessor will trace your implementation back to the catalogue reference (Control IA-5(10)) and look for objective evidence on the latest two assessment cycles.

How to implement

Code Review Testing

Pipeline. Require at least one human reviewer plus passing CI (lint, type, unit, security scan) before merge — protected branches enforce this.

Operational checklist

• Dynamic. Document the trigger, the owner and the cadence.
• Access. Document the trigger, the owner and the cadence.
• Review. Document the trigger, the owner and the cadence.
• Authentication. Document the trigger, the owner and the cadence.
• Identity. Document the trigger, the owner and the cadence.
• Scope: management, authentication, organization, identity, review, capability, authenticators, identification.

Evidence to collect

• Identity Scan. IAM / IdP exports — Entra ID, Okta, IAM Identity Center, Workspace directory — showing accounts, roles, MFA state and last sign-in.

Identity analytics (Okta, SailPoint, Access Analyzer) demonstrates least-privilege. Focus: Dynamic Credential Binding.

How it maps to other frameworks

Computed from shared tags, control component and key-operation subjects — handy when you are reconciling controls across an audit.

• NIST SP 800-171 Rev. 3 3.5.5 — Identifier Management
• CIS Controls v8 9.2 — Use DNS Filtering Services
• ISO/IEC 27001:2022 A.8.23 — Web filtering
• ISO/IEC 27701:2025 A.3.8 — Identity management
• SOC 2 (2017 TSC) CC6.8 — Malicious Code Protection

Related controls in NIST SP 800-53 Rev. 5

• Control IA-5(12) — Biometric Authentication Performance
• Control IA-4(5) — Dynamic Management
• Control IA-5 — Authenticator Management
• Control IA-5(7) — No Embedded Unencrypted Static Authenticators
• Control IA-5(1) — Password-Based Authentication
• Control IA-5(17) — Presentation Attack Detection For Biometric Authenticators

References

• NIST Computer Security Resource Center — NIST SP 800-53 Rev. 5
• Catalogue identifier: Control IA-5(10)

Topics: identity accessidentity managementaccess reviewprivileged accesscode review testing