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Which of the following file types must be monitored by a change-detection mechanism (for example, a file-integrity monitoring tool)?
Scope of Change-Detection Mechanisms
PCI DSS v4.0 requires the implementation of a change-detection mechanism (e.g., file-integrity monitoring) to monitor unauthorized changes to critical files.
Critical files include system configuration and parameter files, application executable files, and scripts used in administrative functions.
Intent of Monitoring System Files
These files often control security settings and operational parameters of systems within the Cardholder Data Environment (CDE). Unauthorized changes could compromise system security.
Exclusions
Documents like application vendor manuals and security policies do not qualify as files requiring integrity monitoring since they do not directly impact the security posture or operational functions of systems in the CDE.
Which scenario meets PCI DSS requirements for critical systems to have correct and consistent time?
Time Synchronization Standards:
PCI DSS Requirement 10.4 mandates that all critical systems use a centralized time server to ensure time accuracy across systems. Approved external sources provide a reliable and consistent time signal.
Correctness and Consistency of Time:
Using a central time server ensures uniformity of timestamps, which is critical for forensic analysis, log correlation, and monitoring activities.
Invalid Options:
A: Internal systems acting as their own servers could lead to inconsistent timestamps.
B: Allowing all users access to time settings poses a security risk.
D: Peering directly with external sources bypasses centralized control, violating consistency requirements.
An entity wants to know if the Software Security Framework can be leveraged during their assessment. Which of the following software types would this apply to?
Software Security Framework Overview
PCI SSC's Software Security Framework (SSF) encompasses Secure Software Standard and Secure Software Lifecycle (Secure SLC) Standard.
Software developed under the Secure SLC Standard adheres to security-by-design principles and can leverage the SSF during PCI DSS assessments.
Applicability
The framework is primarily for software developed by entities or third parties adhering to PCI SSC standards.
It does not apply to legacy payment software listed under PA-DSS unless migrated to SSF.
Incorrect Options
Option A: Not all payment software qualifies; it must align with SSF requirements.
Option B: PCI PTS devices are subject to different security requirements.
Option C: PA-DSS-listed software does not automatically meet SSF standards without reassessment.
Which of the following statements Is true whenever a cryptographic key Is retired and replaced with a new key?
Key Management Requirements:
PCI DSS Requirement 3.6.5 specifies that when a cryptographic key is retired, it must no longer be used for encryption operations but may still be retained for decryption purposes as needed (e.g., to decrypt historical data until it is re-encrypted with the new key).
Secure Key Retirement:
Retired keys should be securely stored or destroyed based on the organization's key management policy to prevent unauthorized access or misuse.
Reference in PCI DSS Documentation:
Section 3.6.5 emphasizes that retired keys must be rendered inactive for further encryption while allowing use for decryption, ensuring data continuity and compliance.
An organization has implemented a change-detection mechanism on their systems. How often must critical file comparisons be performed?
PCI DSS Requirement for File Integrity Monitoring (FIM):
Requirement 11.5 mandates the use of file integrity monitoring to detect unauthorized changes to critical files, and comparisons must be performed at least weekly unless otherwise defined and justified in the entity's risk assessment.
Purpose of Weekly Comparisons:
Ensures timely detection of unauthorized modifications, reducing the risk of compromise.
Invalid Options:
B/D: These timeframes are not specific to PCI DSS unless documented as part of a risk-based approach.
C: Comparisons must occur regularly, not just after changes are installed.
