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Secure Software Boundaries

Repair isolated vulnerabilities and prove the safe behavior.

Advanced
9 lessons
2 projects
About 1.5h
EN · UZ · KO

Use synthetic fixtures to repair XSS, SQL injection, broken authorization, secret leakage, CSRF, and CORS mistakes. Every lab is deny-by-default, network-isolated, and framed for systems you own or are authorized to test.

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Curriculum

Section 1
Untrusted Input
Keep data as data across browser and database sinks.
1. XSS and Output Contexts
2. SQL Parameters
3. Validation vs Encoding
Section 2
Identity & Request Integrity
Authorize resources and reject forged cross-site actions.
1. Authentication vs Authorization
2. CSRF Defenses
3. CORS Is a Browser Boundary
Section 3
Secrets & Verification
Reduce credential exposure and prove both failure and fixed states.

Learning paths

AI-Native Software Developer

Ship a secure TypeScript app built with AI in your workflow: tested algorithms, tools kept inside safe limits, architecture choices you can explain, and releases you can check after they go out.

16 course sequence

Full-Stack Web Developer

Build and share a tested full-stack React app: a screen everyone can use, data only its owner can see, APIs with clear limits, realtime updates that stay correct, and deploys you can roll back.

14 course sequence

Python & Data Developer

Analyze real data and build tested tools that talk to outside APIs safely and search your own content, using Python, Git, SQL, and vector search.

10 course sequence

AI Product Builder

Build and run a real AI product: it searches your own content, uses only the tools you approved, is tested the same way every time, has a plan for when it fails, and shows its speed and cost.

11 course sequence

Try one lesson. Then build the habit.

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