PCI DSS requirements 6.4.3 and 11.6.1 introduce critical mandates for monitoring and tamper detection to protect payment card data, all the way down to a SAQ-A. Requirement 6.4.3 focuses on the management and integrity verification of payment page scripts. Requirement 11.6.1 emphasizes the need for the detection of unauthorized modifications to HTTP headers and payment page contents. Find out what all the fuss is about, and what you need to do to get compliant.