Web Security Guides
9 articlesWeb security is the foundation of every trustworthy application. A single vulnerability — an unescaped input, a misconfigured header, or a leaked API key — can expose user data, destroy brand reputation, and trigger costly regulatory penalties under GDPR, CCPA, and PCI-DSS. These guides cover the full spectrum of modern web security: from preventing cross-site scripting (XSS) and cross-site request forgery (CSRF) at the application layer, to implementing HTTP security headers (Content-Security-Policy, HSTS, X-Frame-Options) at the infrastructure layer. You will learn how to think like an attacker — understanding threat models, attack surfaces, and the OWASP Top 10 — so you can build defenses that actually work. Each article includes practical code examples, real-world vulnerability case studies, and step-by-step remediation guides that you can apply immediately to your projects.
What You'll Learn
- How to prevent XSS, CSRF, SQL injection, and other OWASP Top 10 vulnerabilities
- Implementing Content-Security-Policy, HSTS, and other HTTP security headers correctly
- Password hashing best practices: bcrypt, scrypt, Argon2 — and why SHA-256 is wrong for passwords
- Secure authentication flows: JWT handling, session management, and OAuth 2.0 pitfalls
- HTML entity encoding, input sanitization, and context-aware output escaping
- SSL/TLS certificate management and HTTPS configuration for production deployments
Why This Matters
The average cost of a data breach reached $4.45 million in 2023 (IBM Security). Most breaches exploit known vulnerabilities that proper security practices would have prevented. These guides give you the knowledge to build secure-by-default applications, pass security audits, and protect your users — without needing a dedicated security team.
All Articles
HTTP Security Headers: The Complete Checklist for Your Web App
A practical guide to HTTP security headers — CSP, HSTS, X-Frame-Options, and more. Learn what each header does, how to configure it, and the real attacks they prevent.
SSL/TLS Certificates: What Developers Should Know
A developer-focused guide to SSL/TLS certificates — how they work, how to set them up, how to debug common issues, and why your staging environment keeps showing certificate warnings.
CORS Errors Explained: Why Your Fetch Call Fails and How to Fix It
Understand why CORS errors happen, what the browser is actually doing, and how to fix the most common cross-origin request failures.
Password Security: Generation, Hashing, and Storage Best Practices
A complete guide to password security for developers. Learn password entropy, generation best practices, secure hashing with bcrypt and Argon2, and how to implement password policies correctly.
API Rate Limiting: How It Works and How to Handle It
Understand API rate limiting from both sides — implementing it as a backend developer and handling it gracefully as a consumer. Covers token bucket, sliding window, retry strategies, and common mistakes.
bcrypt vs SHA-256: Password Hashing Compared
Why SHA-256 is wrong for password storage and bcrypt is right. Learn about salting, key stretching, and modern password hashing best practices.
XSS Prevention with HTML Entity Encoding
Learn how cross-site scripting (XSS) attacks work and how HTML entity encoding prevents them. Practical examples for JavaScript and server-side frameworks.
Why Base64 is Not Encryption
Base64 encoding is often mistaken for encryption. Learn exactly why Base64 provides zero security, see real-world vulnerability examples, and understand what to use instead for passwords, API keys, and sensitive data.
Web Security: Encoding and Hashing Guide
Understand the differences between encoding, hashing, and encryption. Learn when to use Base64, SHA-256, bcrypt, AES, and HTML entity encoding for web security — with code examples and decision flowcharts.