The Payment Card Industry (PCI) Data Security Standard (DSS) is a comprehensive set of requirements designed to ensure the safe handling and protection of sensitive cardholder data. The PCI DSS consists of twelve requirements, which are further divided into hundreds of sub-requirements, each focusing on a specific aspect of payment security. These requirements cover various areas, including building and maintaining a secure network, protecting cardholder data, maintaining a vulnerability management program, implementing strong access control measures, regularly monitoring and testing networks, and maintaining an information security policy. The PCI DSS is applicable to any entity that stores, processes, or transmits cardholder data, and compliance is mandatory for any organization accepting payment cards. Non-compliance can result in significant fines and penalties, making it crucial for businesses to understand and adhere to these standards. The PCI DSS is updated periodically to address emerging threats and technologies, ensuring that it remains a robust framework for payment security. For individuals seeking to demonstrate their expertise in PCI DSS compliance, the Certified Payment Card Industry Security Associate (CPSA) certification is available. This certification examines a candidate's knowledge and understanding of the PCI DSS and its requirements, making it an essential qualification for those involved in payment security.