Security

Security is not optional — it is a fundamental requirement for every web application. A single vulnerability can expose user data, damage your reputation, and result in regulatory fines. This topic walks through the most critical security concepts every developer and quality engineer needs to understand, from the OWASP Top 10 to the headers that protect your users.

1. 1
   OWASP Top 10

   Walk through all 10 categories of the OWASP Top 10 2021 with real-world examples and mitigations.
2. 2
   Security Headers

   Content-Security-Policy, HSTS, X-Content-Type-Options, X-Frame-Options, and other headers that harden your site.
3. 3
   Secrets Detection

   Gitleaks, TruffleHog, pre-commit hooks, and how to prevent API keys and tokens from leaking into your codebase.
4. 4
   Supply Chain Security

   npm audit, OSV.dev, Dependabot, SBOMs, and lessons from supply chain attacks like event-stream.
5. 5
   CSP: Content Security Policy Deep Dive

   Directives, nonces vs hashes, strict-dynamic, report-uri, and a step-by-step implementation guide.
6. 6
   SSL/TLS Best Practices

   TLS 1.3, certificate management, HSTS preloading, cipher suites, and common mistakes to avoid.