+AC-11 Device Lock
---+AC-11(01) Pattern-hiding Displays
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AC-11 Device Lock
Control
- Prevent further access to the system by [Selection(one-or-more): initiating a device lock after {{ insert: param, ac-11_odp.02 }} of inactivity; requiring the user to initiate a device lock before leaving the system unattended] ; and
- Retain the device lock until the user reestablishes access using established identification and authentication procedures.
Discussion
Device locks are temporary actions taken to prevent logical access to organizational systems when users stop work and move away from the immediate vicinity of those systems but do not want to log out because of the temporary nature of their absences. Device locks can be implemented at the operating system level or at the application level. A proximity lock may be used to initiate the device lock (e.g., via a Bluetooth-enabled device or dongle). User-initiated device locking is behavior or policy-based and, as such, requires users to take physical action to initiate the device lock. Device locks are not an acceptable substitute for logging out of systems, such as when organizations require users to log out at the end of workdays.
Assessment Objective
- further access to the system is prevented by [Selection(one-or-more): initiating a device lock after {{ insert: param, ac-11_odp.02 }} of inactivity; requiring the user to initiate a device lock before leaving the system unattended];
- device lock is retained until the user re-establishes access using established identification and authentication procedures.
Assessment Method
Examine
Access control policy
procedures addressing session lock
procedures addressing identification and authentication
system design documentation
system configuration settings and associated documentation
security plan
system security plan
other relevant documents or records
Interview
System/network administrators
organizational personnel with information security responsibilities
system developers
1. Overview
| Summary |
Standard |
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AC-11(01) Pattern-hiding Displays
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Control
Conceal, via the device lock, information previously visible on the display with a publicly viewable image.
Discussion
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.
Assessment Objective
information previously visible on the display is concealed, via device lock, with a publicly viewable image.
Assessment Method
Examine
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
System/network administrators
organizational personnel with information security responsibilities
system developers
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1.1 References
1.2 Identified Requirements
1.3 Related Regulations
2. Identified Requirements
Requirements
| Source |
Requirement |
3. Related Regulations
Regulations
| Source |
Regulation |
Linked Issues
- NIST -
EN: Publications of the National Institute of Standards and Technology (NIST), U.S. Department of Commerce, https://www.nist.gov/, from their electronic versions (OSCAL; SP 800-63-4 from its HTML version, https://pages.nist.gov/800-63-4/). Works of NIST employees are not subject to copyright protection in the United States (17 U.S.C. § 105); the OSCAL content is dedicated to the public domain worldwide (CC0 1.0); outside the United States NIST grants the right to reprint its technical series publications in all formats (NIST copyright statement). Republished courtesy of the National Institute of Standards and Technology; each document names its citation. Divided into sections and converted into the GRCA format, the wording unchanged. Only the versions published by NIST are authoritative.
DE: Veröffentlichungen des National Institute of Standards and Technology (NIST), U.S. Department of Commerce, https://www.nist.gov/, aus ihren elektronischen Fassungen (OSCAL; SP 800-63-4 aus ihrer HTML-Fassung, https://pages.nist.gov/800-63-4/). Werke von NIST-Beschäftigten sind in den USA urheberrechtlich nicht geschützt (17 U.S.C. § 105); die OSCAL-Inhalte sind weltweit gemeinfrei gestellt (CC0 1.0); außerhalb der USA räumt das NIST das Recht ein, seine Technical-Series-Publikationen in allen Formaten neu zu veröffentlichen (Copyright-Hinweis des NIST). „Republished courtesy of the National Institute of Standards and Technology“; jedes Dokument nennt seine Zitierangabe. In Abschnitte aufgeteilt und in das GRCA-Format umgewandelt, der Wortlaut unverändert. Maßgeblich sind allein die vom NIST veröffentlichten Fassungen.
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