The Hidden Costs of CSP/SRI for PCI DSS v4 Requirements

Starting March 31, 2025, e-commerce businesses must comply with PCI DSS v4 requirements 6.4.3 and 11.6.1. As the deadline approaches, merchants are actively exploring compliance solutions to protect against web skimming and avoid costly penalties.

Many organizations are considering native browser security features like Content Security Policy (CSP) and Subresource Integrity (SRI) as a potential solution. However, configuring CSP/SRI for PCI DSS compliance presents significant challenges. Beyond complex implementation, the hidden costs of these tools—both financial and operational—are often unpredictable compared to more transparent webpage monitoring and proxy-based solutions.

This white paper breaks down the financial and security implications of using CSP/SRI for PCI DSS compliance and highlights critical factors to consider when evaluating this approach.