7 articles
Implement bulletproof JWT authentication with TypeScript. Covers access tokens, rotating refresh tokens, httpOnly cookies, token revocation, and production security hardening.
Master Passport.js authentication in Node.js with TypeScript. Covers local strategy, JWT, Google OAuth, session handling, and composing multiple strategies in Express.
Comprehensive authentication guide for 2026 covering NextAuth v5 setup, OAuth providers, JWT patterns, middleware-based route protection, and Clerk as a managed alternative.
Comprehensive API security guide for 2026 covering OWASP API Top 10, JWT best practices, CORS configuration, SQL injection prevention, and rate limiting. For developers building public APIs.
Server A issues a JWT. Server B validates it 2 seconds later but thinks the token was issued in the future — invalid. Or a token that should be expired is still accepted because the validating server''s clock is 5 minutes behind. Clock skew causes authentication failures and security holes.
Prevent algorithm confusion attacks, implement safe key rotation, detect token theft with refresh token families, and secure JWTs with binding and revocation strategies.
Understand JWT stateless tradeoffs, session cookie security, token refresh rotation, and hybrid approaches. Learn when to use JWTs for service-to-service auth and why short TTLs matter.