IAST: Continuous, Intelligent Security While the App Is in Use
If SAST checks the code before execution and DAST tests the app while it runs, IAST – Interactive Application Security Testing combines the best of both worlds.
It works while the application is running, but with an inside view of the code and its behavior in real time.
What is IAST?
IAST (Interactive Application Security Testing) is a hybrid approach that places agents inside the application to monitor how it works and identify vulnerabilities based on real usage interactions.
How does IAST work?
- A monitoring agent is integrated into the application
- During normal use (testing or controlled production), IAST observes everything: inputs, outputs, executed code, API calls and database interactions
- Vulnerabilities are detected and put in context with detailed data
- Developers receive precise information to fix issues quickly
✅ Benefits of IAST
- Combines the view of SAST (internal analysis) with that of DAST (real execution)
- Detects flaws in real time
- Reduces false positives
- Provides detailed context for fixes
- Can run continuously during QA or pre-production testing
⚠️ Examples of vulnerabilities IAST can find
- Code injection
- Sensitive data leaks
- Authentication and authorization flaws
- Insecure use of libraries
- Insecure logic that only appears in real scenarios
Recommended tools and practices
Tools such as Contrast Security, Seeker and Hdiv Security are leaders in IAST, but their effectiveness depends on:
- Good secure development practices
- Integration with the DevSecOps pipeline
- Continuous follow-up of the results
How Pluritech uses IAST
At Pluritech, IAST is applied to projects that demand maximum reliability, especially in sectors such as fintech, healthcare and e-commerce.
With it, we combine deep internal analysis with real-use simulation, delivering secure and robust applications.
📢 Conclusion
IAST is the natural evolution of security testing. It does not just find vulnerabilities, it shows how and where they happen, making them easier to fix and strengthening the application against attacks.
📞 Want your next app to be secure from end to end?
👉 Talk to Pluritech and learn how we combine SAST, DAST and IAST to protect your solution.