id: "SC-45(01)" title: "Synchronization with Authoritative Time Source" family: "SC" family_name: "System and Communications Protection" sort_id: "sc-45.01" priority: "P1" implementation_level: "system" parent: "SC-45" enhancement: True
Compare the internal system clocks {{ insert: param, sc-45.01_odp.01 }} with {{ insert: param, sc-45.01_odp.02 }} ; and
Synchronize the internal system clocks to the authoritative time source when the time difference is greater than {{ insert: param, sc-45.01_odp.03 }}.
Guidance
Synchronization of internal system clocks with an authoritative source provides uniformity of time stamps for systems with multiple system clocks and systems connected over a network.
Assessment Objective: the internal system clocks are compared {{ insert: param, sc-45.01_odp.01 }} with {{ insert: param, sc-45.01_odp.02 }};
Assessment Objective: the internal system clocks are synchronized with the authoritative time source when the time difference is greater than {{ insert: param, sc-45.01_odp.03 }}.
System and communications protection policy
procedures addressing time synchronization
system design documentation
system configuration settings and associated documentation
system audit records
system security plan
other relevant documents or records
System/network administrators
organizational personnel with information security responsibilities
organizational personnel installing, configuring, and/or maintaining the system
Mechanisms supporting and/or implementing system time synchronization