PCI Script Security and 6.4.3 and 11.6.1 Compliance: Webinar Q&A

During a webinar titled "A Practical Guide to PCI Script Security and 6.4.3 and 11.6.1 Compliance," several key questions and their answers were shared regarding PCI compliance. Non-compliance with PCI can lead to fines, determined by card brands and potentially passed to merchants via acquirers. The difference between third-party and Level 1 iFrames was clarified, emphasizing that only Level 1 PCI DSS compliant service providers should serve iFrames for cardholder data. Acquirers may conduct spot audits using Qualified Security Assessors (QSAs) to verify Merchant SAQs, with the findings reported to card brands, who then decide on compliance actions. PCI DSS compliance enforcement varies; merchants are typically held accountable by their acquiring banks, whereas service providers may face enforcement from card brands or customer demands. While a Content Security Policy (CSP) is useful, it may not suffice alone for 3D-Secure workflows, and alternative monitoring methods for script changes are recommended. Key security-related HTTP headers to monitor include CSP, HSTS, and others, with some deprecated in favor of CSP directives. The webinar offers insights into managing browser scripts in line with PCI DSS 4.0 requirements.

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