# NIST800 171 3.8.2 — Media Access

- Source: https://support.icompaas.com/support/solutions/articles/a_gen_nist800171_382_6236f19810-nist800-171-382-media-access
- Section: [Solutions](https://support.icompaas.com/support/solutions) › [NIST SP 800-171 Readiness](https://support.icompaas.com/support/solutions/c_gen_nist800171) › [Media Protection](https://support.icompaas.com/support/solutions/folders/f_gen_cgennist800171_mediaprotection)
- Last updated: 2026-05-30
- Publisher: iCompaas, Inc. (https://www.icompaas.com)

NIST800 171 · Control 3.8.2 · Priority: high · Component: Media Protection

### What this control covers

This control restricts access to Controlled Unclassified Information (CUI) on system media to authorized personnel or roles. It involves physical control of media, including conducting inventories and ensuring secure check-out and return procedures. For digital media, access is further restricted through cryptographic means to prevent unauthorized access to CUI. This control supports the Media Access Management capability within the Media Protection (3.8) family.

### Why it matters

Risk is the language an executive team understands; this control connects technical reality to board-level decisions and budget allocation.

### How to implement

#### AWS

Codify the policy intent as **SCPs, AWS Config conformance packs, and Security Hub standards** so the cloud enforces what the document says.

#### Azure

Codify in **Azure Policy initiatives** (built-in regulatory compliance for CIS, ISO 27001, SOC 2, HIPAA) and assign at management-group level.

#### GCP

Use **Cloud Identity** (or Workspace) as the IdP and **IAM** for resource access. Grant roles at the lowest scope (project > folder > org) using **Workload Identity Federation** for CI/CD and **service accounts** for workloads — never download service-account keys when avoidable. Enable **Policy Intelligence** recommenders to right-size privileges and detect dormant identities.

#### Google Workspace

Enforce **2-Step Verification** (preferably hardware keys for admins) for the entire org, set session length to ≤ 12 hours, and disable less-secure-app access. Use **Context-Aware Access** levels to restrict admin sign-in by IP/device posture. Provision and de-provision users via **SCIM** from your HRIS so leavers lose access on day one.

#### GitHub

Require **SSO + SCIM** from your IdP on the organisation; enforce **2FA** org-wide and use **fine-grained PATs** (or, better, GitHub Apps) instead of classic tokens. Restrict **outside collaborators**, require signed commits on protected branches, and use **OIDC** from Actions to short-lived AWS/GCP/Azure credentials rather than stored secrets.

#### Zoho Mail

Make **two-factor authentication** mandatory for all users (TOTP, OneAuth, or YubiKey) in _Admin Console → Security_. Configure **SAML SSO** against your IdP and disable password-based logins for admins. Use **role-based privileges** (Admin / Spam Moderator / Mail Account Admin) and review the _Login history_ report monthly for anomalies.

#### On-premises

Maintain a policy library with a documented review cadence (annual minimum); store in your GRC tool with attestation tracking. Map each policy to controls so an audit pull cites the exact policy clause.

### Evidence to collect

-   `identity_scan` — See the iCompaas Evidence library for the canonical source for this evidence type.
-   `infra_scan` — See the iCompaas Evidence library for the canonical source for this evidence type.

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

### Quick checklist

-   Access — Management / Cui
-   Information — Management / Cui
-   Protection — Management / Cui
-   Authorized — Management / Cui
-   System — Management / Cui
-   Media — Management / Cui

### Related articles on this site

-   [NIST 800-171 3.1.1 Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).](https://support.icompaas.com/support/solutions/articles/62000229223-nist-800-171-3-1-1-limit-information-system-access-to-authorized-users-processes-acting-on-behalf-of)
-   [NIST 800-171 3.8.2 Limit access to CUI on system media to authorized users](https://support.icompaas.com/support/solutions/articles/62000229311-nist-800-171-3-8-2-limit-access-to-cui-on-system-media-to-authorized-users)
-   [NIST 800-171 3.8.5 Control access to media containing CUI and maintain accountability for media during transport outside of controlled areas.](https://support.icompaas.com/support/solutions/articles/62000229314-nist-800-171-3-8-5-control-access-to-media-containing-cui-and-maintain-accountability-for-media-durin)
-   [CMMC 2.0 AC.1.001 Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems)](https://support.icompaas.com/support/solutions/articles/62000229379-cmmc-2-0-ac-1-001-limit-information-system-access-to-authorized-users-processes-acting-on-behalf-of-)

## Related compliance guidance

- [NIST SP 800-171 and CMMC: a practical guide to protecting CUI in the cloud](https://support.icompaas.com/compliance/nist-sp-800-171-rev-3): The CUI requirements CMMC Level 2 assesses, the SPRS score, POA&M rules and the phased DFARS rollout.
- [NIST SP 800-53 Rev. 5: a practical implementation guide for cloud teams](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5): The federal catalogue 800-171 is derived from — useful when a contract also cites a FedRAMP baseline.