Which standard must organizations comply with to be PCI DSS compliant?

To achieve compliance, organizations must adhere to the Payment Card Industry Data Security Standard (PCI DSS). This standard specifically focuses on protecting cardholder data throughout the payment card transaction process, establishing requirements for security management, policies, procedures, network architecture, and other critical protective measures.

PCI DSS was developed by the Payment Card Industry Security Standards Council (PCI SSC) and is designed to ensure that all companies that accept, process, store, or transmit credit card information maintain a secure environment. Compliance with PCI DSS is essential for reducing fraud and enhancing security in payment card transactions.

The other listed standards or regulations address different aspects of security and data protection. For instance, ISO encompasses a broad range of standards, but not specifically focused solely on payment card data. GDPR is primarily concerned with personal data protection and privacy for individuals within the European Union. FISMA pertains to federal information systems, focusing on securing government data and is thus not applicable to all organizations that deal with payment card transactions. Therefore, PCI DSS is the only relevant standard that organizations must comply with to ensure proper handling and protection of payment card information.