Which statement best represents a time data management requirement under PCI DSS?

Which statement best represents a time data management requirement under PCI DSS?

• A. Time data should be stored only on the primary server.
• B. Time data should be publicly visible in logs.
• C. Time data should not be encrypted during transmission.
• D. Time data protection is required and time synchronization technology should be used.

Answer: (D)

The main idea is that logs and their timestamps must be reliable, consistent, and protected. PCI DSS expects accurate time data so events recorded on different systems can be correlated during monitoring, auditing, and incident response. To achieve this, you need to protect the time information (the timestamps in logs and related records) and ensure clocks are synchronized across all systems that handle cardholder data. Using a trusted time source and time synchronization technology, such as NTP, keeps clocks aligned and prevents drift, which is essential for accurately reconstructing security events. This approach is why the statement about protecting time data and employing time synchronization is the best fit. It contrasts with options that would keep time data in one place, expose it publicly, or neglect encrypting it in transit—none of which align with PCI DSS goals for reliable, secure logging and traceability.

The main idea is that logs and their timestamps must be reliable, consistent, and protected. PCI DSS expects accurate time data so events recorded on different systems can be correlated during monitoring, auditing, and incident response. To achieve this, you need to protect the time information (the timestamps in logs and related records) and ensure clocks are synchronized across all systems that handle cardholder data. Using a trusted time source and time synchronization technology, such as NTP, keeps clocks aligned and prevents drift, which is essential for accurately reconstructing security events.

This approach is why the statement about protecting time data and employing time synchronization is the best fit. It contrasts with options that would keep time data in one place, expose it publicly, or neglect encrypting it in transit—none of which align with PCI DSS goals for reliable, secure logging and traceability.