A Strong Alternative to Jscrambler
Stop eSkimming attacks and script-based data leaks at runtime
Why Teams Look Beyond Jscrambler
Security and compliance leaders evaluating Jscrambler often run into the same issues:- Code protection does not secure payment flows. Obfuscation helps guard source code but does not control third and fourth party script behavior on checkout or data entry pages.
- Monitoring does not stop attacks. Jscrambler may alert after something happens, but malicious behavior can still execute before anyone responds.
- Heavy engineering effort. Instrumentation and obfuscation must be implemented, tested, and maintained across every release cycle.
- Partial alignment to PCI DSS 4.0.1. Requirements 6.4.3 and 11.6.1 call for script authorization, integrity checks, and monitoring within the browser. Obfuscation alone does not meet those expectations.
How Source Defense is Different
Real time prevention
Source Defense isolates and controls script behavior in the browser. Unauthorized access to sensitive fields is blocked before it happens. Independent reviews from VikingCloud and Coalfire confirm that Source Defense can meet PCI DSS 6.4.3 and 11.6.1 when deployed correctly.
See what runtime protection looks like in a live demo.
Instant insight into script behavior, risk scoring, and PCI DSS compliance gaps.
Full visibility into third and fourth party scripts
Most risk sits in scripts you don’t control.
Source Defense automatically discovers all first, third and fourth party scripts, identifies what they access, and profiles their behavior.
Verizon’s Payment Security Report shows more than 18 scripts per page on average, with heavy exposure on payment pages.
Purpose built for PCI DSS 4.0.1
Source Defense provides:- Script inventory and authorization workflows
- Real time monitoring for unauthorized changes
- QSA ready reporting for 6.4.3 and 11.6.1
Behavior based protection instead of static controls
- CSP and SRI are static and require constant tuning. They miss compromised but allowed third party scripts.
- Source Defense uses patented JavaScript sandboxing and behavioral policies to prevent unauthorized reading, writing, and data exfiltration.
- This includes protection against AI generated keyloggers and modern Magecart style attacks.
Fast deployment with minimal operational effort
Deployment is two lines of code added through your existing tag manager or template.
Most customers deploy in days and spend less than five hours a month managing the platform.
What To Expect In The First 30 Days
Source Defense uses a defined onboarding process that moves from discovery to full protection in less than a month.
You can expect:
- Automatic discovery and scoping of all scripts across your payment flows
- A custom PCI dashboard with live findings
- Recommended behavioral policies for each script
- Quick deployment and validation
- QSA ready reporting for 6.4.3 and 11.6.1
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.
