Assessment Objective

Determine if:

• SC-45(01)(a) the internal system clocks are compared [Assignment: frequency] with [Assignment: authoritative time source];
• SC-45(01)(b) the internal system clocks are synchronized with the authoritative time source when the time difference is greater than [Assignment: time period].

Assessment Methods

Examine

• 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

Interview

• System/network administrators
• organizational personnel with information security responsibilities
• organizational personnel installing, configuring, and/or maintaining the system

Test

• Mechanisms supporting and/or implementing system time synchronization

Ticket collegati

• NIST -

  https://csrc.nist.gov/pubs/sp/800/53/r5/upd1/final