Which of the following is a common error in PCI DSS scoping?

When assessing PCI DSS scoping, it is critical to understand that assuming encrypted data is out of scope can lead to significant compliance issues. Encryption does provide a layer of security for sensitive cardholder data, but simply having data encrypted does not automatically exclude it from being in scope for PCI DSS compliance. Data must be fully evaluated to determine its exposure and how it is utilized within the payment card processing environment. If the data is still being processed, stored, or transmitted in a manner that could impact security, it remains in scope regardless of its encryption status. Therefore, it is essential for organizations to thoroughly assess their data environments and not assume that encryption alone will shield them from compliance responsibilities.

Identifying all physical locations, maintaining a complete inventory of systems, and interviewing all application owners are positive practices that contribute to a clearer understanding of the PCI DSS environment. These methods allow for a comprehensive evaluation of what is in scope and ensures that all aspects of the cardholder data environment are accounted for, helping to minimize the risks associated with non-compliance.