SEA-30: Clock Synchronization
Mechanisms exist to utilize time-synchronization technology to synchronize all critical system clocks.
Renumbered: Formerly SEA-20 in SCF 2025.4.
Control Question: Does the organization utilize time-synchronization technology to synchronize all critical system clocks?
General (28)
| Framework | Mapping Values |
|---|---|
| CSA CCM 4.1.0 | LOG-06 |
| GovRAMP | AU-08 |
| GovRAMP Low | AU-08 |
| GovRAMP Low+ | AU-08 |
| GovRAMP Moderate | AU-08 |
| GovRAMP High | AU-08 |
| IEC 62443-2-1 2024 | NET 1.9 |
| IEC 62443-3-3 2013 | SR 2.11 RE 1 |
| IEC 62443-4-2 2019 | CR 2.11(2) |
| ISO 27002 2022 | 8.17 |
| ISO 27017 2015 | 12.4.4 |
| ISO 27018 2025 | 8.17 |
| MPA Content Security Program 5.3.1 | TS-1.5 |
| NIST 800-53 R4 | AU-8 |
| NIST 800-53 R5.2 | AU-08 |
| NIST 800-53B R5 (low) (source) | AU-08 |
| NIST 800-53B R5 (moderate) (source) | AU-08 |
| NIST 800-53B R5 (high) (source) | AU-08 |
| NIST 800-82 R3 | AU-08 |
| NIST 800-82 R3 LOW OT Overlay | AU-08 |
| NIST 800-82 R3 MODERATE OT Overlay | AU-08 |
| NIST 800-82 R3 HIGH OT Overlay | AU-08 |
| NIST 800-171 R2 (source) | 3.3.7 |
| PCI DSS 4.0.1 (source) | 10.6 10.6.1 10.6.2 10.6.3 |
| PCI DSS 4.0.1 SAQ A-EP (source) | 10.6.1 10.6.2 10.6.3 |
| PCI DSS 4.0.1 SAQ C (source) | 10.6.1 10.6.2 10.6.3 |
| PCI DSS 4.0.1 SAQ D Merchant (source) | 10.6.1 10.6.2 10.6.3 |
| PCI DSS 4.0.1 SAQ D Service Provider (source) | 10.6.1 10.6.2 10.6.3 |
US (12)
| Framework | Mapping Values |
|---|---|
| USA Federal CMS MARS-E 2.0 | AU-8.a AU-8(1) AU-8(1)-IS.1 |
| USA Federal DHS CISA TIC 3.0 | 3.UNI.TSYNC |
| USA Federal CMMC 2.0 Level 2 | AUL2.-3.3.7 |
| USA Federal CJIS Security Policy 6.0 | AU-8 |
| USA Federal FedRAMP R5 (low) | AU-08 |
| USA Federal FedRAMP R5 (moderate) | AU-08 |
| USA Federal FedRAMP R5 (high) | AU-08 |
| USA Federal FedRAMP R5 (LI-SaaS) | AU-08 |
| USA Federal IRS 1075 2021 | AU-8 |
| USA Texas DIR SCSC 2.2 2025 | AU-08 |
| USA Texas TX-RAMP Level 1 | AU-08 |
| USA Texas TX-RAMP Level 2 | AU-08 |
EMEA (6)
| Framework | Mapping Values |
|---|---|
| EMEA EU DORA RTS 2024 | Article 12.2(f) |
| EMEA UK DEFSTAN 05-138 2024 | 2421 |
| EMEA UK DEFSTAN 05-138 - L1 2024 | 2421 |
| EMEA UK DEFSTAN 05-138 - L2 2024 | 2421 |
| EMEA UK DEFSTAN 05-138 - L3 2024 | 2421 |
| EMEA Saudi Arabia ECC-1 2018 | 2-3-3-4 |
APAC (3)
| Framework | Mapping Values |
|---|---|
| APAC Australia ISM June 2026 | ISM-0988 |
| APAC Japan ISMAP | 12.4.4 12.4.4.1 12.4.4.2 12.4.4.3 12.4.4.4.PB |
| APAC Malaysia RMiT 2025 | A5-A5 |
Americas (1)
| Framework | Mapping Values |
|---|---|
| Americas Argentina Reg 132 2018 | E.1.2-9 |
Capability Maturity Model
Level 0 — Not Performed
Practices are non-existent, based on the inability to demonstrate an implemented and operational capability. A reasonable person would conclude the control is not being performed.
Level 1 — Performed Informally
Secure Engineering & Architecture (SEA) domain capabilities are ad hoc and inconsistent. Capability criteria associated with this control may include: ▪ Policies, standards & procedures associated with SEA domain capabilities provide limited coverage due to the depth and breadth of the existing documentation. ▪ Security engineering-related activities are decentralized (e.g., a localized/regionalized function) and uses non-standardized methods to implement secure, resilient and compliant practices. ▪ IT and/or cybersecurity personnel use an informal process to design, build and maintain secure, compliant and resilient solutions.
Level 2 — Planned & Tracked
Secure Engineering & Architecture (SEA) capabilities are requirements-driven, but are not standardized across the entity (e.g., local/regional level consistency). Capability criteria associated with this control reasonably expect the following criteria to exist: ▪ Policies and standards associated with SEA domain capabilities are formally documented and centrally-managed by the entity. ▪ Standardized Operating Procedures (SOP) associated with SEA domain capabilities are documented and maintained by process owners. ▪ IT and/or cybersecurity personnel work with business stakeholders and process owners to appropriately scope and reasonably implement cybersecurity and data protection controls associated with SEA domain capabilities to address applicable statutory, regulatory and/or contractual requirements for Technology Assets, Applications, Services and/or Data (TAASD). ▪ Secure engineering and architecture-related controls are primarily administrative and preventative in nature (e.g., policies, standards and procedures & guidelines). ▪ Secure engineering and architecture management may be a defined function (e.g., team or department) or assigned as an additional duty to existing IT and/or cybersecurity personnel. ▪ IT and/or cybersecurity personnel define entity-specific secure engineering practices to protect the Confidentiality, Integrity, Availability and Safety (CIAS) of the entity's TAASD. ▪ IT and/or cybersecurity personnel align secure engineering practices with the entity's broader IT architecture practices. ▪ IT and/or cybersecurity personnel use secure engineering practices to influence Secure Baseline Configurations (SBC).
Level 3 — Well Defined
Secure Engineering & Architecture (SEA) capabilities are standardized across the entity for applicability to People, Processes, Technologies, Data and/or Facilities (PPTDF) to ensure consistency for Technology Assets, Applications, Services and/or Data (TAASD). Capability criteria associated with this control reasonably expect the following criteria to exist: ▪ Policies and standards associated with SEA domain capabilities are formally documented and centrally-managed by the entity's Governance, Risk & Compliance (GRC) team, or similar function. ▪ Standardized Operating Procedures (SOP) associated with SEA domain capabilities are well-documented and kept current by process owners. ▪ A cybersecurity engineering / architecture team, or similar function, is appropriately staffed and supported to implement and maintain RSK domain capabilities. ▪ Technology is leveraged to enhance the efficiency and accuracy of secure engineering management operations (e.g., project management solution). ▪ The entity's Governance, Risk & Compliance (GRC) team, or similar function, works with business stakeholders and process owners to appropriately scope and reasonably implement cybersecurity and data protection controls associated with SEA domain capabilities to address Minimum Compliance Requirements (MCR) (e.g., applicable statutory, regulatory and/or contractual requirements) and Discretionary Security Requirements (DSR) (e.g., entity-required controls). ▪ Secure Baseline Configurations (SBC) enforce the secure engineering principles on all applicable Technology Assets, Applications and/or Services (TAAS). ▪ An implemented and operational capability exists to utilize time-synchronization technology to synchronize all critical system clocks.
Level 4 — Quantitatively Controlled
Secure Engineering & Architecture (SEA) capabilities, in addition to being standardized across the entity and centrally managed to ensure consistency across Technology Assets, Applications, Services and/or Data (TAASD), efforts are metrics driven to provide sufficient insight for decision makers to predict optimal performance, ensure continued operations and/or identify areas for improvement. Capability criteria associated with this control reasonably expect the following criteria to exist: ▪ Applicable SCR-CMM Level 3 (Well Defined) capabilities are implemented and operational. ▪ Metrics reporting includes quantitative analysis of Key Performance Indicators (KPIs). ▪ Metrics reporting includes quantitative analysis of Key Risk Indicators (KRIs). ▪ Scope of metrics, KPIs and KRIs covers organization-wide cybersecurity and data protection controls, including functions performed by third-parties. ▪ Organizational leadership maintains a formal process to objectively review and respond to metrics, KPIs and KRIs (e.g., monthly or quarterly review). ▪ Based on metrics analysis, process improvement recommendations are submitted for review and are handled in accordance with change control processes. ▪ Business and technical stakeholders are involved in reviewing and approving proposed changes to evolve capabilities.
Level 5 — Continuously Improving
Utilize SCR-CMM Level 3 or Level 4 (if available) criteria definitions: ▪ There are no defined Level 5 criteria, since it is reasonable to assume a continuously-improving process is not necessary to operationalize this control. ▪ Level 5 capabilities should be considered “world-class” where the control builds on Level 4 capabilities, but are continuously improving through Artificial Intelligence (AI) and/or Machine Learning (ML) technologies. ▪ While it may be possible to develop responsive capabilities for this control through the use of AI and/or ML technologies, the criteria would be organization-specific to define.
Assessment Objectives
- SEA-30_A01 granularity of time measurement for audit record timestamps is defined.
- SEA-30_A02 internal system clocks are used to generate timestamps for audit records.
Evidence Requirements
- E-MON-12 Event Log Protection & Time Synchronization
-
Documented evidence of event log protection (access restriction, cryptographic protection, separate backup) and synchronization with an authoritative time source.
Event Log Monitoring
Technology Recommendations
Micro/Small
- Secure Baseline Configurations (SBC)
Small
- Secure Baseline Configurations (SBC)
Medium
- Secure Baseline Configurations (SBC)
Large
- Secure Baseline Configurations (SBC)
Enterprise
- Secure Baseline Configurations (SBC)