Discover Why Traditional Defenses Fall Short Against eSkimming Attacks

Download the Free eBook: Behavior-Based vs CSP and SRI: Which is more effective?

Web-based attacks are evolving, and most organizations aren’t ready. While legacy defenses like Content Security Policy (CSP) and Subresource Integrity (SRI) provide limited, static protection, today’s threats demand a more dynamic response.

This free eBook offers a deep dive into the critical gap in web security that 97% of consumer-facing websites fail to address: protection of third-party scripts in the browser. You’ll learn why behavior-based security is rapidly becoming the new standard for defending against:

  • eSkimming and Magecart attacks
  • Credential harvesting and formjacking
  • Data leakage from third- and fourth-party JavaScript
  • AI-generated keyloggers and real-time script manipulation

What You Will Learn

  • Why CSP and SRI fall short in dynamic web environments
  • How behavior-based security blocks threats at the point of data entry
  • How to meet PCI DSS 4.0 requirements 6.4.3 and 11.6.1—without heavy lift
  • Real-world case studies showing 100% prevention of unauthorized data access
  • Actionable steps to assess and close your client-side security gap

Why It Matters

PCI DSS 4.0 requirements for payment page script control and monitoring are no longer optional. Traditional tools can’t keep up with evolving attacker tactics—and failing to meet compliance could result in penalties, reputational damage, and lost customer trust.

This guide cuts through the complexity, compares leading approaches, and lays out a fast path to compliance and protection.

Download the Report

About Source Defense

As a PCI Participating Organization and the pioneer in eSkimming security, Source Defense played a role in the development of new requirements for web security found in PCI DSS 4.0.

We’ve helped thousands of the world’s leading brands address these issues. We’ve also been educating merchants, QSAs, PSPs, eCommerce Platform providers and virtually every stakeholder in PCI compliance on the vulnerabilities in modern website design that make eSkimming attacks possible. We’ve made it our misison to provide guidance around ambiguity in the standard; advise on the pros and cons of approaches provided by the council and we recently launched a free assessment, monitoring and management solution for both merchants and their QSAs. 

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