A practical security tutorial series for developers. Learn how to write secure code, prevent common attacks, and protect your users. Every article has working code examples in Go, Python, JavaScript, and Kotlin.
No fear-mongering. Just simple explanations, real attacks, and practical prevention code.
Part 1: Fundamentals (Tutorials #1–#5)
Learn the most important web security concepts and how to prevent the most common attacks.
| # | Tutorial | What You Will Learn |
|---|---|---|
| 1 | Web Security Basics — OWASP Top 10 (Coming Soon) | All 10 OWASP 2025 categories, real-world examples, prevention tips |
| 2 | Authentication — Passwords, Hashing, JWT (Coming Soon) | bcrypt, Argon2, JWT tokens, refresh tokens, secure storage |
| 3 | Authorization — RBAC, OAuth 2.0, OpenID Connect (Coming Soon) | Role-based access control, OAuth flows, PKCE, Login with Google |
| 4 | SQL Injection and XSS — How to Prevent Them (Coming Soon) | Parameterized queries, output escaping, CSP, HttpOnly cookies |
| 5 | HTTPS and TLS — How Encryption Works (Coming Soon) | TLS handshake, certificates, Let’s Encrypt, HSTS |
Part 2: Web and API Security (Tutorials #6–#10)
Protect your web applications and APIs from the most common attacks.
| # | Tutorial | What You Will Learn |
|---|---|---|
| 6 | CSRF — Cross-Site Request Forgery Prevention (Coming Soon) | CSRF tokens, SameSite cookies, double-submit cookie, custom headers |
| 7 | CORS — Cross-Origin Resource Sharing Explained (Coming Soon) | Same-origin policy, preflight requests, CORS configuration |
| 8 | API Security — Rate Limiting, Input Validation, API Keys (Coming Soon) | Rate limiting, input validation, API authentication, OWASP API Top 10 |
| 9 | Managing Secrets — Environment Variables, Vaults, Key Rotation (Coming Soon) | .env files, HashiCorp Vault, cloud secret managers, pre-commit hooks |
| 10 | Security Headers — CSP, HSTS, X-Frame-Options (Coming Soon) | Content-Security-Policy, HSTS, clickjacking prevention, Helmet |
Part 3: Infrastructure and Deployment (Tutorials #11–#14)
Secure your dependencies, containers, and deployment pipeline.
| # | Tutorial | What You Will Learn |
|---|---|---|
| 11 | Dependency Scanning and Supply Chain Security (Coming Soon) | Vulnerability scanning, SBOMs, Trivy, Dependabot, supply chain attacks |
| 12 | Security Logging and Monitoring (Coming Soon) | What to log, what never to log, alerting, audit trails, centralized logging |
| 13 | Container and Docker Security (Coming Soon) | Non-root containers, image scanning, minimal images, Docker secrets |
| 14 | Security Checklist — Complete Guide (Coming Soon) | Complete security checklist for every project, organized by priority |
Who is This For?
- Backend developers building APIs and web applications
- Mobile developers who need to secure API calls and token storage
- Frontend developers who want to prevent XSS and understand CSP
- Anyone who wants to write more secure code without becoming a security researcher
How to Use This Series
Start from Tutorial #1 and go in order. Each tutorial builds on the previous one. The articles show the attack first, then the prevention — so you understand WHY each defense matters.
All code examples are self-contained. You can copy and run them in your language of choice.