SC-45.2 ยท Secondary Authoritative Time Source

Control Description

Identify a secondary authoritative time source that is in a different geographic region than the primary authoritative time source; and Synchronize the internal system clocks to the secondary authoritative time source if the primary authoritative time source is unavailable.

Impact Baselines
Security baselines where this control applies
Not in any baseline
Control Properties
SP800-53-enhancement
system
Enhancement
Control Statement
The control requirements

(a) Identify a secondary authoritative time source that is in a different geographic region than the primary authoritative time source; and

(b) Synchronize the internal system clocks to the secondary authoritative time source if the primary authoritative time source is unavailable.

Supplemental Guidance

It may be necessary to employ geolocation information to determine that the secondary authoritative time source is in a different geographic region.