What is required by Requirement 6 of PCI DSS?

Requirement 6 of PCI DSS focuses on the development and maintenance of secure systems and applications. This requirement emphasizes the importance of building security into the software development lifecycle to protect cardholder data and ensure that applications are resistant to vulnerabilities.

This involves implementing security measures at every stage of application development, such as conducting risk assessments, applying secure coding practices, and regularly reviewing and testing applications for weaknesses or vulnerabilities. By doing so, organizations can minimize the risk of security breaches and ensure that their systems are resilient against threats.

The other options, while relevant to a broader security strategy, do not specifically align with the core focus of Requirement 6. Regular audits of security systems, encryption of user passwords, and User Acceptance Testing (UAT) are important aspects of an overall security program but do not directly pertain to the specific requirements outlined in Requirement 6 regarding the secure development and maintenance of systems and applications.