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Cloud Controls Matrix
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LOG-06: Clock Synchronization
Clock Synchronization
LOG-06: Is a reliable time source being used across all relevant information processing systems?
Synchronizing system clocks enables proper coordination between systems and facilitates tracing and the reconstitution of activity timelines.

Potential implementation guidance can be derived from the NIST Internet Time Servers overview (see https://tf.nist.gov/tf-cgi/servers.cgi).

Also, the following concepts should be considered:
a. Critical systems have the correct and consistent time.
b. Time is synchronized across all systems.
c. Time data is protected.
d. Time settings are received from industry-accepted time sources.
Control implemented
Not applicable - A “N/A” answer indicates that the portion of the control in question is out of scope of the assessment. The “SSRM control ownership” column is to be left blank (e.g., greyed out), and optionally the CSP may explain why it is the case (“CSP Implementation Description”).
No - A “No” answer indicates that the portion of the control in question is not implemented, while in scope of the assessment. The CSP has to assign the implementation responsibility of the control to the relevant party under column “SSRM control ownership”, and optionally elaborate on the “why” (has not been implemented), and “what” has to be done for its implementation by that party.
Yes - A “Yes” answer indicates that the portion of the control in question is implemented. The CSP indicates the responsible and accountable parties (SSRM control ownership), and optionally elaborates on the implementation “how-to” per relevant party CSP and/or CSC.
Control ownership
CSP-owned - The CSP is entirely responsible and accountable for the CCM control implementation.
CSC-owned - The Cloud Service Customer (CSC) is entirely responsible and accountable for the CCM control implementation.
Third-party - The third-party CSP in the supply chain (e.g., an IaaS provider) is responsible for CCM control implementation, while the CSP is fully accountable.
Shared CSP and CSC - Both the CSP and CSC share CCM control implementation responsibility and accountability.
Shared CSP and third party - Any CCM control implementation responsibility is shared between CSP and the third party, but the CSP remains fully accountable.
Description

Use a reliable time source across all relevant information processing systems.