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According to the PCI DSS v3.2.1 Quick Reference Guide1, any in-scope system except for those identified as not at risk from malware must have anti-malware solutions installed and configured according to best practices. This is one of the requirements for preventing malware infections that could compromise cardholder data.

According to requirement 3.1.2, multi-tenant service providers must ensure that customers cannot access another entity’s cardholder data environment, which means they should isolate each customer’s cardholder data from other customers’ cardholder data and prevent unauthorized access or disclosure. This is one of the requirements for ensuring that multi-tenant service providers protect each customer’s cardholder data.

According to the PCI DSS v3.2.1 Quick Reference Guide1, a compensating control must address the risk associated with not adhering to a PCI DSS requirement and must be approved by an authorized person before implementation. This is one of the requirements for reducing or eliminating a risk that cannot be eliminated by other means

According to the PCI DSS v3.2.1 Quick Reference Guide1, an internal NTP server that provides time services to the cardholder data environment is in scope for PCI DSS if it stores processes or transmits cardholder data, regardless of whether it provides authentication services to systems in the DMZ or not. This is one of the requirements for preventing unauthorized access to cardholder data using time services.

According to the PCI DSS v3.2.1 Quick Reference Guide1, assigning a unique ID to each person is intended to ensure individual users are accountable for their own actions, rather than shared accounts or group accounts based on need-to-know. This is one of the requirements for ensuring that user accounts are properly managed and controlled.

when PAN is sent over the Internet, PAN must be encrypted with strong cryptography, which means it should use encryption techniques such as WEP, WPA, WPA2, or TLS/SSL to prevent unauthorized access or interception. This is one of the requirements for ensuring that PAN is protected from unauthorized access or interception.

According to the PCI DSS v3.2.1 Quick Reference Guide1, security policies and operational procedures should be distributed to and understood by all affected parties, such as management, staff, contractors, vendors, and service providers. This is one of the requirements for ensuring that security policies and operational procedures are communicated and followed consistently.

According to the PCI DSS v3.2.1 Quick Reference Guide1, internal vulnerability scans must be performed after a significant change in any component or configuration that affects cardholder data or payment processing systems. This is one of the requirements for identifying and mitigating vulnerabilities that could compromise cardholder data.

According to the PCI DSS v3.2.1 Quick Reference Guide1, passwords for default accounts and default administrative accounts should be changed before installing a system on the network. This is one of the requirements for preventing unauthorized access to cardholder data.

an entity can use both the Customized Approach and the Defined Approach to meet the same requirement, as long as it uses compensating controls to address any weaknesses or gaps inthe customized control. This is one of the requirements for ensuring that an entity can use both approaches when appropriate.

According to the PCI DSS v3.2.1 Quick Reference Guide1, screening and background checks for personnel with access to the cardholder data environment are required, as they may pose a risk if they have compromised or stolen cardholder data in the past or present. This is one of the requirements for ensuring that personnel with access to cardholder data are qualified and trustworthy.

The Secure SLC standard is one of the two standards that are part of the PCI Software Security Framework (SSF), which provides security requirements and assessment procedures for software vendors to integrate into their software development lifecycles and to validate that secure lifecycle management practices are in place12. The Secure SLC standard is designed to offer a more flexible approach to how the security and integrity of payment software is tested, and to address the evolving threat landscape and changes in software development practices3.

The PCI DSS Requirement 6 states that entities must develop and maintain secure systems and applications, and it includes several sub-requirements that cover variousaspects of software security, such as change control, secure coding, vulnerability management, and patching4. By using custom software that is compliant with the Secure SLC standard, an entity may be able to meet some or all of these sub-requirements, as the Secure SLC standard covers similar topics and ensures that the software is developed and maintained in a secure manner throughout its entire lifecycle1. However, this does not automatically make the entity PCI DSS compliant, as there are other requirements and controls that the entity must implement and validate, such as network security, access control, monitoring, and incident response4. Therefore, the correct answer is option B.

The other options are not true regarding the impact of using custom software that is compliant with the Secure SLC standard on the PCI DSS assessment. Option A is not true because, as explained above, the entity still has to comply with other PCI DSS requirements and controls that are not covered by the Secure SLC standard. Option C is not true because there is a positive impact to the entity, as it may help the entity to meet several requirements in Requirement 6 and to demonstrate that the custom software is secure and reliable. Option D is not true because the custom software cannot be excluded from the PCI DSS assessment, as it is part of the cardholder data environment (CDE) and it may store, process, or transmit cardholder data or sensitive authentication data. The entity must ensure that the custom software meets the PCI DSS requirements and controls that are applicable to it, and that the assessor validates its compliance4. References:

• Software Security Framework Secure Software Life Cycle (Secure SLC) Standard
• PCI Security Standards Council Publishes Version 1.1 of Secure Software Lifecycle (SLC) Standard and Program
• PCI Security Standards Council Publishes Version 1.1 of Secure Software Standard and Program
• PCI DSS v3.2.1

when disk encryption is used to protect account data, access to the disk encryption must be managed independently of the operating system access control mechanisms, which means it should not be affected by changes in the operating system settings or permissions. This is one of the requirements for ensuring that disk encryption is secure and effective.