Phase 5: Security Testing AI-Generated Code · 60 min · Semgrep · Bandit · Z3 SMT solver

Building Security Gates

6 industry tools combined catch 7.6%. Build a gate that catches the other 92.4%.

Real-world application: Engineers who can build multi-layer security pipelines (SAST + formal verification + AI review) address the 97.8% gap in industry tools and demonstrate production-grade security engineering.

What you will learn

Compose SAST + formal verification + AI review into a multi-layer security pipeline
Understand the 97.8% gap: 6 industry tools combined catch only 7.6% of Z3-proven vulnerabilities
Build a security gate that enforces all three layers in CI/CD
Configure gate thresholds and failure modes for each layer

Introduction

Building Security Gates

Objective

Run the multi-layer security gate (SAST + AI review + Z3) on 100 AI-generated code artifacts. Observe the 97.8% gap closing from 7.6% (SAST alone) to ~97% (combined). Verify that AND logic blocks merge when any gate fails.

6 industry tools combined catch 7.6%. Build a gate that catches the other 92.4%.

Unlock the full lesson

You've read the first 2 sections. The rest of this lesson covers The Problem, The Concept, Build, Check Yourself, Key Terms & Next — plus a hands-on lab, quiz, and project artifact.

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