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AC-11(1) AC · Access Control

Pattern-hiding Displays

LOW ✓ MODERATE ✓ HIGH
1 Overlay 0 Related Controls
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Requirements NIST SOURCE

Conceal, via the device lock, information previously visible on the display with a publicly viewable image.

Discussion (NIST Supplemental Guidance)

The pattern-hiding display can include static or dynamic images, such as patterns used with screen savers, photographic images, solid colors, clock, battery life indicator, or a blank screen with the caveat that controlled unclassified information is not displayed.

Implementation Guidance

Engineering Interpretation

Original engineering commentary written for this explorer — not NIST source text and not authoritative guidance.

No engineering interpretation has been authored for AC-11(1) yet. This section is architected to receive it — see the Requirements and Assessment sections above for the authoritative NIST source content in the meantime.

Assessment

NIST SP 800-53A REV 5.2.0

Assessment Objectives

  1. information previously visible on the display is concealed, via device lock, with a publicly viewable image.

Examine

[SELECT FROM: Access control policy; procedures addressing session lock; display screen with session lock activated; system design documentation; system configuration settings and associated documentation; system security plan; other relevant documents or records].

Interview

[SELECT FROM: System/network administrators; organizational personnel with information security responsibilities; system developers].

Test

[SELECT FROM: System session lock mechanisms].

Overlays

Showing the OT/ICS overlay for the parent control AC-11 — see the AC-11(1) entries within each baseline below.

OT/ICS Overlay SP 800-82r3

NIST SP 800-82r3 Appendix F, Table 22. Blank baseline means the control/control enhancement is not selected in that initial OT baseline.

LOW

Not applicable at this tier.

MODERATE

  • Base control: Included (matches standard baseline)
  • Included: (1)

HIGH

  • Base control: Included (matches standard baseline)
  • Included: (1)

STIGs & CCIs

No STIG checks or CCI mappings are currently loaded for AC-11(1). This section is architected to display, per product: STIG ID, Finding ID, Severity, Title, Description, Check, Fix, CCI, and NIST control mapping — but nothing is populated here until a real DISA STIG/CCI dataset is ingested.

Learn more about STIG/CCI integration →

Evidence

Potential Evidence — Derived

Categorized from the SP 800-53A "Examine"/"Test" artifact list above by keyword — not an authoritative NIST evidence list.

Policy

  • Access control policy
  • system security plan

Configuration

  • system design documentation
  • system configuration settings and associated documentation

Testing

  • System session lock mechanisms

Other Records

  • procedures addressing session lock
  • display screen with session lock activated
  • other relevant documents or records