AU-8(1): Synchronization With Authoritative Time Source

Parent Control:

AU-8: Time Stamps

CSF v1.1 References:


  • Moderate
  • High
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Control is withdrawn in the next version of this control set and incorporated into: SC-45(1): Synchronization with Authoritative Time Source.

Control Statement

The information system:

  1. Compares the internal information system clocks [Assignment: organization-defined frequency] with [Assignment: organization-defined authoritative time source]; and
  2. Synchronizes the internal system clocks to the authoritative time source when the time difference is greater than [Assignment: organization-defined time period].

Supplemental Guidance

This control enhancement provides uniformity of time stamps for information systems with multiple system clocks and systems connected over a network.