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  AC-11: Session Lock  

base control objective:
The information system:
a. Prevents further access to the system by initiating a session lock after [Assignment: organization-defined time period] of inactivity or upon receiving a request from a user; and
b. Retains the session lock until the user reestablishes access using established identification and authentication procedures.

supplemental objective information:
A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented at the point where session activity can be determined. This is typically at the operating system-level, but may be at the application-level. A session lock is not a substitute for logging out of the information system, for example, if the organization requires users to log out at the end of the workday.

enhancements to the base objective:

(1) The information system session lock mechanism, when activated on a device with a display screen, places a publically viewable pattern onto the associated display, hiding what was previously visible on the screen.

mapping to FIPS199 baseline:

  LOW: null     MOD: base     HIGH: base  

related (regimented) controls:

None.

documents referenced in SP800-53rev3 for AC-11:

Document Date Status Title
OMB M-06-16 June, 2006 current   Protection of Sensitive Agency Information

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