Which requirement is focused on the regular testing of security systems and processes?

Requirement 11 of the PCI DSS specifically emphasizes the importance of regularly testing security systems and processes to ensure they are functioning effectively and safeguarding cardholder data. This is vital for maintaining a strong security posture and addressing potential vulnerabilities before they can be exploited. Regular testing includes activities such as conducting vulnerability scans, penetration testing, and reviewing security controls and configurations to ensure compliance with industry standards.

By focusing on the regular assessment of security measures, Requirement 11 aims to establish a proactive approach to security rather than a reactive one. It helps organizations identify weaknesses and improve their security measures in a timely manner, contributing to the overall effectiveness of their security framework.

The other requirements address different aspects of security management, such as user access control, audit trails, and security policies, which are also crucial but do not specifically target the regular testing component that is central to Requirement 11.